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Earth of fire

Actualité volcanique, Articles de fond sur étude de volcan, tectonique, récits et photos de voyage

volcanic activity

Publié le par Bernard Duyck
Publié dans : #volcanic activity
Piton de La Fournaise - overflight of the eruptive site by the PGHM on 05.04.2020: lava fountain 50 m high. and rapid construction of a cone - photo SAG and PGHM via OVPF

Piton de La Fournaise - overflight of the eruptive site by the PGHM on 05.04.2020: lava fountain 50 m high. and rapid construction of a cone - photo SAG and PGHM via OVPF

Following a reconnaissance flight by the SAG and the PGHM carried out on April 5 at around 10:30 am local time at Piton de La Fournaise, the casting front could be located with precision (white star on the map). It was 550 m above sea level, about 2.7 km from national road 2 (compared to 800 m above sea level and 3 km from the road yesterday at 6:52 pm). The activity focuses on 2-3 eruptive mouths, with lava fountains reaching 50 meters high.

Note that from an altitude of 400m the slopes will be much less steep (12-13% on average) which will have the consequence of slowing the spread of the flow.

Piton de La Fournaise - Mapping of the lava flow dated 4/4/2020 at 18:52 local time. The white star represents the position of the pouring front at 10:12 local time on 5/4/2020 (© OVPF / IPGP / LMV / OPGV).

Piton de La Fournaise - Mapping of the lava flow dated 4/4/2020 at 18:52 local time. The white star represents the position of the pouring front at 10:12 local time on 5/4/2020 (© OVPF / IPGP / LMV / OPGV).

The intensity of the volcanic tremor (indicator of the intensity of the eruption) has been relatively stable over the past 24 hours.

Strong seismic activity has been recorded under the summit craters since morning, and 189 superficial volcano-tectonic earthquakes have been recorded. These earthquakes are located less than 2 km deep below the southeast edge of the summit.

These earthquakes testify to the weakening of the environment, either by a circulation of fluid or the emptying of a reservoir, most certainly in connection with the supply of the eruptive site and its revival of activity since approximately 24 hours.

Given this weakening, a risk of collapse of the Dolomieu crater (or part of the crater) is not excluded.

Piton de La Fournaise- Evolution of the RSAM (volcanic tremor indicator) since 02/04/2020 at 00h UT time (04h local time) on the seismological station DSO located at the top of the volcano. (© OVPF / IPGP).

Piton de La Fournaise- Evolution of the RSAM (volcanic tremor indicator) since 02/04/2020 at 00h UT time (04h local time) on the seismological station DSO located at the top of the volcano. (© OVPF / IPGP).

Piton de La Fournaise - Histogram representing the number of surface volcano-tectonic earthquakes recorded since 4/4/2020 00 (UT time).

Piton de La Fournaise - Histogram representing the number of surface volcano-tectonic earthquakes recorded since 4/4/2020 00 (UT time).

Thermal images taken by an OVPF team yesterday evening and images from OVPF webcams that night show that the pour is still very active. Last night, the OVPF team on site reported that the northernmost casting fronts had stopped, with activity focusing on a new casting arm to the south. The lava front on this new  arm most certainly progressed last night. The Sainte Rose gendarmerie will go on site to regularly monitor its development, given the increase in lava flows.

The estimated surface flows, from satellite data via the HOTVOLC (OPGC - University of Auvergne) and MIROVA (University of Turin) platforms, although still greatly disturbed by the cloud cover around Piton de la Fournaise, are still within the rise. Over the past 12 hours, average flows have been estimated at 30 m³ / s.

Thermal anomalies, when not disturbed by cloud cover, are very high, with a VRP of 5,218 MW on April 5 at 6:55 p.m.

Piton de La Fournaise - Shooting of the eruptive site on 5/4/2020 around 8pm local time from the RN2 - note the temperature difference between the two lava arms (© OVPF-IPGP).

Piton de La Fournaise - Shooting of the eruptive site on 5/4/2020 around 8pm local time from the RN2 - note the temperature difference between the two lava arms (© OVPF-IPGP).

Piton de La Fournaise - thermal anomalies on 05.04.2020 / 22h00 - Doc. Mirova Modis

Piton de La Fournaise - thermal anomalies on 05.04.2020 / 22h00 - Doc. Mirova Modis

Piton de La Fournaise - SO2 mass 5,66 kt on 05.04.2020 - Doc. Sentinel-5 P Tropomi -  DLR / BIRA / ESA

Piton de La Fournaise - SO2 mass 5,66 kt on 05.04.2020 - Doc. Sentinel-5 P Tropomi - DLR / BIRA / ESA

The Réunion air observatory (ORA) has recorded a concentration of sulfur dioxide (SO2) since Sunday, April 5, 2020 since 5 am in the town of Tampon (observation station "Bourg Murat"). Consequently, the prefect of Réunion decided to implement the information and recommendation procedure relating to atmospheric pollution.

Short-term exposure may have limited and transient health effects for sensitive people such as young children, asthma or allergies, chronic respiratory failure or the elderly with respiratory disorders, over 65 years and women pregnant.

Weather news draws attention to the dispersion of Pélé's hair over an area up to 50 km from the eruption site, e.g. on the Plaine des Palmistes, Bras Panon, etc.

 

Sources: OVPF, ORA, Weather news 974 & Ludovic Leduc / Onactif volcans

Find all the information relating to the activity of Piton de la Fournaise on the various media of the OVPF-IPGP:
- the website (http://www.ipgp.fr/fr/ovpf/actualites-ovpf),
- the Twitter account (https://twitter.com/obsfournaise?lang=fr),
- and the facebook account (https://www.facebook.com/ObsVolcanoPitonFournaise/)

Piton de La Fournaise - 06.04.2020 / 01:50 UT - Cascades webcam

Piton de La Fournaise - 06.04.2020 / 01:50 UT - Cascades webcam

Piton de La Fournaise - 06.04.2020 / 5h47 - HD camera OVPF IRT

Piton de La Fournaise - 06.04.2020 / 5h47 - HD camera OVPF IRT

In the Ryukyu arc, the activity of the Kuchinoerabujima continues, according to the JMA with plumes of gas and ash observed this April 6 at 8:10 a.m. JST, from a height of 400 meters, and at 3 p.m. JST, with a plume reaching 700 meters.

Ash and lapilli falls are expected.

The alert level is 3 / do not approach the volcano.

 

Sources: JMA & NHK

 Kuchinoerabujima - 06.04.2020 / 8h26 JST - NHK image

 Kuchinoerabujima - 06.04.2020 / 8h26 JST - NHK image

On Suwanosejima, on alert level 2 / not to approach the crater, an eruption occurred on March 6 from 3 p.m. local time, and ash falls are expected.

 

Source: JMA

Suwanosejima - activity of 06.04.2020 and ash dispersal area - Doc. JMA

Suwanosejima - activity of 06.04.2020 and ash dispersal area - Doc. JMA

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
Rincon de La Vieja - 04.04.2020 / 8h24 - hydrothermal explosion - screenshot of the video of the Ovsicori.

Rincon de La Vieja - 04.04.2020 / 8h24 - hydrothermal explosion - screenshot of the video of the Ovsicori.

Rincon de La Vieja - 04.04.2020 - degassing after the hydrothermal explosion - screenshot of the video of the Ovsicori.

Rincon de La Vieja - 04.04.2020 - degassing after the hydrothermal explosion - screenshot of the video of the Ovsicori.

At 8:24 a.m. today April 4, a hydrothermal explosion occurred in Rincon de La Vieja (Costa Rica), with an eruptive column that rose 1,000 meters above the crater and 2,916 meters above above sea level (meters above sea level), easily observed due to weather conditions in the area.

Since yesterday, the inhabitants of Buenos Aires de Upala (community located towards the northern flank) reported the observation of the plume of the volcano associated with degassing.

 

Source: Ovsicori

Poas - intense degassing on 03.04.2020, respectively at 11.38 am and 3.15 pm - Ovsicori webcam
Poas - intense degassing on 03.04.2020, respectively at 11.38 am and 3.15 pm - Ovsicori webcam

Poas - intense degassing on 03.04.2020, respectively at 11.38 am and 3.15 pm - Ovsicori webcam

In Poas, on April 3, 2020, a strong degassing was observed around the old dome. ; medium to vigorous degassing marked mouth A and there was continuous tremor. The SO2 / CO2 ratio has reached the highest values ​​in months. The maximum sulfur dioxide concentration at the watchtower was 6 ppm in the morning.

On April 4, degassing was moderate to vigorous from mouth A. The maximum concentration of SO2 recorded at the watchtower this morning was approximately 4 ppm. The SO2 / CO2 ratio decreased from the previous day by 0.9. There have been slight fluctuations with a tendency to decrease the H2S / SO2 ratio (from 0.11 to 0.06) compared to the previous day The concentration of SO2 detected at the MultiGas station located on the western edge of the crater has reached a value of ~ 11 ppm in the early morning today.

 

Source: Ovsicori

 Piton de La Fournaise - 05.04.2020 / 5:35 UT - webcam piton de Bert

Piton de La Fournaise - 05.04.2020 / 5:35 UT - webcam piton de Bert

Piton de La Fournaise - 05.04.2020 / 8h17 - webcamHD OVPF / IRT

Piton de La Fournaise - 05.04.2020 / 8h17 - webcamHD OVPF / IRT

The eruption which started on 02.04.2020 on the eastern flank of Piton de la Fournaise, around 12:20 local time, continues. The intensity of the volcanic tremor (indicator of the intensity of the eruption) has been relatively stable over the past 24 hours despite a temporary increase between 9:00 a.m. and 11:00 a.m. (local time) this morning

The bad weather prevailing in the eastern area of ​​Piton de la Fournaise at the beginning of the morning did not allow us to locate the casting front using the images from our cameras.

Piton de La Fournaise - Evolution of the RSAM (indicator of the volcanic tremor and the intensity of the eruption) since 02/04/2020 at 00h UT time (04h local time) on the DSO seismological station located at the top of the volcano. (© OVPF / IPGP).

Piton de La Fournaise - Evolution of the RSAM (indicator of the volcanic tremor and the intensity of the eruption) since 02/04/2020 at 00h UT time (04h local time) on the DSO seismological station located at the top of the volcano. (© OVPF / IPGP).

Piton de La Fournaise -  thermal anomaly on 04.04.2020 /  21h20 - Doc. Mirova_MODIS_Latest10NTI

Piton de La Fournaise - thermal anomaly on 04.04.2020 / 21h20 - Doc. Mirova_MODIS_Latest10NTI

Over the past 24 hours:
- no significant deformation has been recorded,
- but a marked resumption of seismicity under the summit zone should be noted with 13 superficial volcano-tectonic earthquakes (<2 km deep) over the past 11 hours, including 10 over the past 5 hours.
Note that following this recovery in seismicity, the OVPF / IPGP lost data from one of its stations located near the eruptive crack (station became unreachable). A request for aerial reconnaissance via the Air Force Gendarmerie Section was requested in order to have a visual feedback of the situation at the eruptive site and to see if any new cracks would have opened.
- at the same time, the flow of CO2 into the soil at the distal stations (Plaine des Cafres, Plaine des Palmistes sector) is on the rise again. This increase could reflect the continuation of a deep re-supply of magma.

Piton de La Fournaise - Mapping of the lava flow dated 4/4/2020 at 18:52 local time (© OVPF / IPGP / LMV / OPGV).

Piton de La Fournaise - Mapping of the lava flow dated 4/4/2020 at 18:52 local time (© OVPF / IPGP / LMV / OPGV).

Piton de La Fournaise - Interferogram representing the deformations at Piton de la Fournaise associated with the eruption of April 2, 2020 (© OVPF-IPGP). In addition to ground measurements, the OVPF also uses a satellite technique called dInSAR to monitor the building's inflation / deflation cycles associated with magma movements at depth. To do this, the satellite “illuminates” an area of ​​the ground with an electromagnetic wave and collects the signal reflected from the ground. The comparison of two measurements of this type of the same surface taken at different times makes it possible to image the deformations of the surface. The above interferogram shows the deformation of the surface associated with the eruption of April 2, 2020. (© OVPF-IPGP).

Piton de La Fournaise - Interferogram representing the deformations at Piton de la Fournaise associated with the eruption of April 2, 2020 (© OVPF-IPGP). In addition to ground measurements, the OVPF also uses a satellite technique called dInSAR to monitor the building's inflation / deflation cycles associated with magma movements at depth. To do this, the satellite “illuminates” an area of ​​the ground with an electromagnetic wave and collects the signal reflected from the ground. The comparison of two measurements of this type of the same surface taken at different times makes it possible to image the deformations of the surface. The above interferogram shows the deformation of the surface associated with the eruption of April 2, 2020. (© OVPF-IPGP).

An acquisition of the Sentinel1 satellite yesterday at the end of the afternoon (04.04.2020 at 18:52 local time) made it possible to carry out a mapping of the lava flow, as well as an interferogram in order to visualize the deformations at the scale of the Fouqué enclosure.

The interferogram above shows the deformation of the surface associated with the eruption of April 2, 2020. Each complete color cycle (from red to blue) of the interferogram corresponds to 27.8 mm of displacement from the surface to (positive) or opposite (negative) of the Sentinel-1 satellite (whose direction is represented by the arrow "LOS" at the top right of the figure). The black lines represent the location of the eruptive cracks of the eruption of February 10-16, 2020 and the red line the location of the crack opened on April 2, 2020.

At 6:52 p.m. local on April 4, the casting front was around 800 m above sea level (against 1000 m above sea level on 03.04 morning), or approximately 3.3 km (against 3.8 km on 03.04 in the morning) of the RN2. Given the slopes in the area, the casting front must have continued to spread overnight. Indeed, the shots taken that night by the gendarmerie of Sainte Rose and the webcam of the OVPF / IPGP located in Piton Cascade (Sainte Rose) show that the casting front continues its progression.

At 10:30 am local time on April 5, it was 550 m above sea level, about 2.7 km from the national road.

Piton de La Fournaise - 04.04.2020 / 6.39pm - the lava flow front in the Great Slopes - © Image Gendarmerie Ste Rose via OVPF

Piton de La Fournaise - 04.04.2020 / 6.39pm - the lava flow front in the Great Slopes - © Image Gendarmerie Ste Rose via OVPF

The estimated surface flows, from satellite data via the HOTVOLC platform (OPGC - University of Auvergne) are still greatly disturbed by the cloud cover around the Piton de la Fournaise. But an increase seems to take shape over the last 12 hours with flows fluctuating between 3 and 63 m3 / s. and an average around 15-25 m3 / s. over the last 12 hours.

 

Source: OVPF

Find all the information relating to the activity of Piton de la Fournaise on the various media of the OVPF-IPGP:
- the website (http://www.ipgp.fr/fr/ovpf/actualites-ovpf),
- the Twitter account (https://twitter.com/obsfournaise?lang=fr),
- and the facebook account (https://www.facebook.com/ObsVolcanoPitonFournaise/)

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Publié le par Bernard Duyck
Publié dans : #volcanic activity, #Sismologia
 Piton de La Fournaise - 04.04.2020 / 9.47am - HD / OVPF / IRT panoramic camera

Piton de La Fournaise - 04.04.2020 / 9.47am - HD / OVPF / IRT panoramic camera

At the Piton de La Fournaise, the eruption which started on 02.04.2020 on the eastern flank of the Piton de la Fournaise, around 12:20 local time, continues. The intensity of the volcanic tremor (indicator of the intensity of the eruption) has been relatively stable over the past 12 hours.

On April 3, at 6:25 a.m., the lava front could be estimated at around 1,000 m above sea level at the top of the Grandes Pentes, and 3.8 km from the national road, according to visual feedback from the webcam of the OVPF / IPGP located in Piton Cascades.

The eruption has stabilized on the central part of the eruptive fissure. The number of fountains is reduced little by little and soon the eruption will only be active on one or two mouths. In the meantime, the projected pieces of lava fall back and build a spatter-rampart which has already grown well.

On April 3 at 10:15 p.m., the thermal anomaly noted by Mirova was VRP 2607 MW (probably due to a thinning)

Note that during the lateral magma intrusion towards the eruptive site on April 2, between 8:50 am and 12:20 pm, and following the seismic crisis (8:15 am - 8:51 am), the deformations and seismicity were extremely weak. The lateral propagation was thus done in a fairly "passive" way in an already open environment and extremely weakened by the eruptions of 2019 and the eruption of February 10-16, 2020 which took place in this sector.

Piton de La Fournaise - Spatter-rampart under construction - rb photo / ImazPress Réunion 03.04.2020

Piton de La Fournaise - Spatter-rampart under construction - rb photo / ImazPress Réunion 03.04.2020

Piton de La Fournaise - Evolution of the RSAM (indicator of the volcanic tremor and the intensity of the eruption) since 02/04/2020 at 00h UT time (04h local time) on the DSO seismological station located at the top of the volcano. (© OVPF / IPGP).

Piton de La Fournaise - Evolution of the RSAM (indicator of the volcanic tremor and the intensity of the eruption) since 02/04/2020 at 00h UT time (04h local time) on the DSO seismological station located at the top of the volcano. (© OVPF / IPGP).

The CO2 fluxes in the far field soil (Plaine des Cafres / Plaine des Palmistes sectors) fell between 28/3 and 01/4 before increasing again. This could correspond to an expulsion of superficial magma (superficial reservoir) by a rise of deeper magma.

SO2 air flows have dropped since yesterday. This drop is in agreement with the visual feedback from the eruptive site which shows weaker activity today.

The estimated surface flows, from satellite data via the HOTVOLC platform (OPGC - University of Auvergne) are greatly disturbed by the cloud cover around the Piton de la Fournaise. Estimates since the start of the eruption fluctuate between 2 and 45 m³ / s with an average around 7-10 m³ / s.

 

Source: OVPF

 

Find all the information relating to the activity of Piton de la Fournaise on the various media of the OVPF-IPGP:
- the website (http://www.ipgp.fr/fr/ovpf/actualites-ovpf),
- the Twitter account (https://twitter.com/obsfournaise?lang=fr),
- and the facebook account (https://www.facebook.com/ObsVolcanoPitonFournaise/)

Piton de La Fournaire - measurement of the SO2 mass by Sentinel-5P Tropomi on 03.04.2020: 6.15 kt - Doc. Tropomi / DLR / BIRA / ESA

Piton de La Fournaire - measurement of the SO2 mass by Sentinel-5P Tropomi on 03.04.2020: 6.15 kt - Doc. Tropomi / DLR / BIRA / ESA

Piton de La Fournaise - 03.04.2020 / 5:05 pm UT - OVPF webcam Piton de Bert

Piton de La Fournaise - 03.04.2020 / 5:05 pm UT - OVPF webcam Piton de Bert

This Friday, April 03 at 04.17 local time, an earthquake of local magnitude 2.8 located 3.2 km deep was recorded under the summit of the Chaitén volcano. The National Service of Geology and Mines has indicated that this earthquake is associated with rock fracturing and the dynamics of internal fluids (hybrid earthquake). The volcanic technical alert remains on "verde".

The last period of activity of the Chaiten occurred between May 2, 2008 and May 31, 2011 (GVP). This first historic eruption produced major explosive rhyolitic activity, numerous pyroclastic flows and lahars, and was followed by the installation of a dome complex which filled much of the caldera.

 

Sources: Sernageomin & Global Volcanism Program

The eruptive plume of the Chaitén volcano - photo Patricia Santini M / 10.05.2008

The eruptive plume of the Chaitén volcano - photo Patricia Santini M / 10.05.2008

GPS measurements, along with detailed analysis and model calculations of the available data, now testify to a new magma deposit west of the Reykjanes Peninsula under Rauðhólar and Sýrfell.

The map shows the location of the magmatic deposits which would have occurred during the year on the Reykjanes peninsula. These are preliminary results and the models are simplified, but will be updated as data is received. The map indicates when the intrusions were formed - 1. in orange: January 2020 - 2. in red: February-March 2020 - 3. in green: March-April 2020. - Doc. IMO

The map shows the location of the magmatic deposits which would have occurred during the year on the Reykjanes peninsula. These are preliminary results and the models are simplified, but will be updated as data is received. The map indicates when the intrusions were formed - 1. in orange: January 2020 - 2. in red: February-March 2020 - 3. in green: March-April 2020. - Doc. IMO

This confirms the data that was collected in collaboration with the Institute of Earth Sciences, ÍSORs, HS Energy and the Icelandic Meteorological Office after the start of activities in Thorbjörn.

"The data we have processed indicates that the magma intrusion took place from mid-February to the first week of March. This image was better explained when we received data from GPS measurements from the University, which are not directly linked to our monitoring system, which means that we have not detected them so far, "says Kristín Jónsdóttir, group director of nature conservation at the Icelandic Meteorological Office.

One model places the magmatic intrusion about 8-13 km deep, which is probably deep in the earth's crust at a depth considerably higher than the two magma deposits at Thorbjörn.

"This magma deposit under Sýrfell is the third magma deposit that we have reported on the Reykjanes peninsula since the beginning of the year. The presence of this magma insert shows that it is necessary to examine activity on the peninsula Reykjanes globally, not just local activity around Svartsengi and Reykjanes, " said Kristín Jónsdóttir. It reiterates that it is too early at this stage to draw solid conclusions and underlines the need to examine the current activity in a historical context with other known events in the Reykjanes peninsula.

Rauðhólar (icelandic Red hills) - photo Roman Z / wikipedia

Rauðhólar (icelandic Red hills) - photo Roman Z / wikipedia

Rauðhólar (the Icelandic red hills):

Remains of a group of pseudocraters in the Elliðaárhraun lava fields on the south-eastern outskirts of Reykjavik, Iceland. Rauðhólar's age is around 5200 years. Originally there were more than 80 craters, but their gravel was taken and used in construction. Most of the equipment was taken away during the Second World War for constructions such as Reykjavík Airport and road construction.

 

Source: IMO

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
 Piton de La Fournaise - the eruptive site and the flows 02.04.2020 - image © SAG - PGHM via OVPF

 Piton de La Fournaise - the eruptive site and the flows 02.04.2020 - image © SAG - PGHM via OVPF

Piton de La Fournaise - the eruptive site, its lava fountains and the flows 02.04.2020 - image © SAG - PGHM via OVPF

Piton de La Fournaise - the eruptive site, its lava fountains and the flows 02.04.2020 - image © SAG - PGHM via OVPF

The eruption that started on April 2, 2020 around 12:20 local time at Piton de La Fournaise continues.

Following the seismic crisis, no earthquake had been recorded. As Aline Peltier explains in an interview with LINFO. Re, this particular case of propagation without seismicity is to be related to an environment already weakened by the eruption of February 2020 and those of 2019, which took place on the same flank.

A second particular characteristic: the eruption started very quickly, in less than 2 days from the first warning sign, because very little magma had been emitted on the surface in February, making it available quickly. 

Piton de La Fournaise - Location map of the eruption tremor, 04/02/2020 between 1:15 p.m. and 1:30 p.m. (local time) (© OVPF / IPGP).

Piton de La Fournaise - Location map of the eruption tremor, 04/02/2020 between 1:15 p.m. and 1:30 p.m. (local time) (© OVPF / IPGP).

Piton de La Fournaise - Evolution of the RSAM (indicator of the volcanic tremor and the intensity of the eruption) since 02/04/2020 00h on the seismological station DSO located at the top of the volcano. (© OVPF / IPGP).

Piton de La Fournaise - Evolution of the RSAM (indicator of the volcanic tremor and the intensity of the eruption) since 02/04/2020 00h on the seismological station DSO located at the top of the volcano. (© OVPF / IPGP).

The intensity of the volcanic tremor (indicator of the intensity of the eruption) after an increase phase at the start of the eruption has been relatively stable over the past two hours. An overview of the SAG and the PGHM confirmed the opening of a crack on the eastern flank of the volcano about 1.7 km from the center of the Dolomieu crater at around 1900 m above sea level. This crack is located slightly below the eruption of February 10-16, 2020. During this overflight, the lava fountains did not seem to exceed 30m in height.

A significant signal of sulfur dioxide, with 31.37 DU, is observed by Tropomi above La Fournaise.

Piton de La Fournaise - 02.04. 2020- SO2 emission 0.32 kt - Sentinel-5 P Tropomi image - Doc. DLR / BIRA / ESA

Piton de La Fournaise - 02.04. 2020- SO2 emission 0.32 kt - Sentinel-5 P Tropomi image - Doc. DLR / BIRA / ESA

The estimated surface flows, from satellite data via the HOTVOLC platform (OPGC - University of Auvergne) are greatly disturbed by the bad weather conditions observed around Piton de la Fournaise. The rare measurements carried out, relate to flows of the order of 4 m³ / s but these are probably underestimated.

The Mirova site reports thermal anomalies on April 2 from 16 MW at 10:35 am, and 156 MW at 9:30 pm, attenuated by the clouds.

Piton de La Fournaise - Thermal anomalies on 02.04.2020 / 9:30 p.m. - Doc. Mirova MODIS_logVRP

Piton de La Fournaise - Thermal anomalies on 02.04.2020 / 9:30 p.m. - Doc. Mirova MODIS_logVRP

The island being in Covid-19 confinement, there are few images of the volcanophiles on the spot, the confirmation of the eruption was carried out by helicopter by the volcanologists thanks to the PGHM and the journalists of Imaz Press / http: // www.ipreunion.com/volcan,5/.

But you can still see some nice pictures on the webcams; to note: a beautiful pyrocumulus develops above the flows, seen from the webcam of Piton de Bert, in the evening.

 

Sources: OVPF / IPGP; Mirova; Sentinel-5 P Tropomi; ImazPress; Linfo.Re

Piton de la Fournaise - activity at 2:20 p.m., 2:46 p.m., 2:50 p.m. and 3:15 p.m. - OVPF webcams of Piton de Bert and Piton Partages - one click to enlargePiton de la Fournaise - activity at 2:20 p.m., 2:46 p.m., 2:50 p.m. and 3:15 p.m. - OVPF webcams of Piton de Bert and Piton Partages - one click to enlarge
Piton de la Fournaise - activity at 2:20 p.m., 2:46 p.m., 2:50 p.m. and 3:15 p.m. - OVPF webcams of Piton de Bert and Piton Partages - one click to enlargePiton de la Fournaise - activity at 2:20 p.m., 2:46 p.m., 2:50 p.m. and 3:15 p.m. - OVPF webcams of Piton de Bert and Piton Partages - one click to enlarge

Piton de la Fournaise - activity at 2:20 p.m., 2:46 p.m., 2:50 p.m. and 3:15 p.m. - OVPF webcams of Piton de Bert and Piton Partages - one click to enlarge

Piton de La Fournaise - incandescence of the eruptive site and formation of a pyro-cumulus - image capture 02.04.2020 / 6:47 pm - HD panoramic camera / copyright: IRT and IPGP-OVPF property

Piton de La Fournaise - incandescence of the eruptive site and formation of a pyro-cumulus - image capture 02.04.2020 / 6:47 pm - HD panoramic camera / copyright: IRT and IPGP-OVPF property

Second day of eruption on Piton de La Fournaise

Piton de La Fournaise - 03.04.2020 / 01h20 TU - OVPF webcam Cascades

Piton de La Fournaise - 03.04.2020 / 01h20 TU - OVPF webcam Cascades

Piton de La Fournaise - pyrocumulus over the lava flows on  03.04.2020 / 02h25 TU - OVPFwebcam Cascades

Piton de La Fournaise - pyrocumulus over the lava flows on 03.04.2020 / 02h25 TU - OVPFwebcam Cascades

In Vanuatu, the VGO signals an increase in the activity of Yasur, on alert 2 / major disorders on 2,3 and 4 April 2020.

Sometimes intense explosions with expulsion of projectiles and volcanic bombs in / and around the summit crater, and the emission of plumes of vapors and gases mark the volcano; the level of risk for visitors entering danger zone A (around the edge of the crater to the parking zone) remains increased.

Areas and villages in the southern part of Tanna can continue to expect ash falls and volcanic gas effects depending on the wind direction (currently northeast direction

 

Source: activity reports of the Vanuatu Geohazards Observatory of April 2 and 3.

Yasur - activity, respectively from April 2 at 8:30 am and 1:45 pm, and from April 3 at 9:15 am - Doc. VGO - one click to enlarge
Yasur - activity, respectively from April 2 at 8:30 am and 1:45 pm, and from April 3 at 9:15 am - Doc. VGO - one click to enlargeYasur - activity, respectively from April 2 at 8:30 am and 1:45 pm, and from April 3 at 9:15 am - Doc. VGO - one click to enlarge

Yasur - activity, respectively from April 2 at 8:30 am and 1:45 pm, and from April 3 at 9:15 am - Doc. VGO - one click to enlarge

The BPPTKG reports an eruption in Merapi / Java on April 2 at 3:10 pm WIB / 8:10 am Z. It was accompanied by a plume of gas and ash observed at about 3,000 meters above the summit, with a drift to the east. Its imprint on the seismogram is of an amplitude of 78 mm and a duration of 345 seconds.

The activity level remains at 2 / waspada, with a 3 km radius danger zone around the summit, and an orange VONA.

 

Sources: BPPTKG, PVMBG, Magma Indonesia

 Merapi - ash plume of 02.04.2020 / 3.10pm WIB - photo BPPTKG

Merapi - ash plume of 02.04.2020 / 3.10pm WIB - photo BPPTKG

Merapi - summary table of the activity of 02.04.2020 / 00h-24h WIB - Doc. PVMBG

Merapi - summary table of the activity of 02.04.2020 / 00h-24h WIB - Doc. PVMBG

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La Fournaise on alert 2-2

Following the seismic crisis of April 2 in the morning, between 8:15 a.m. and 8:51 a.m. local time, and after a lull of more than 3 hours, a volcanic tremor, synonymous with the arrival of magma in proximity to the surface, has been recorded since approximately 12:20 local time.

According to the OVPF records, the source of this tremor is located on the eastern flank, at inside the Enclosure.

No visual confirmation of an onset of eruption could be made at this time and
we cannot confirm the arrival of the lava on the surface. Nevertheless the presence
of a tremor shows the emission of hot and incandescent gases on the surface, and
possibility of lava emission.

The recommended alert level is 2-2

 

Source: OVPF

Piton de La Fournaise - RSAM and location of the tremor between 12.54 and 13.09 local time on 04/02/2020 (image © OVPF / IPGP).

Piton de La Fournaise - RSAM and location of the tremor between 12.54 and 13.09 local time on 04/02/2020 (image © OVPF / IPGP).

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March 2020 was a particularly calm month at Piton de la Fournaise, according to the OVPF:

The replenishment of magma and the pressurization of the surface magmatic reservoir which had resumed following the end of the eruption of February 10-16, ceased around March 10, 2020.

At the same time, seismicity remained low in March, with less than one earthquake per day recorded under the summit craters.

Note that during the last two days of March, 3 and 7 superficial volcano-tectonic earthquakes were recorded.

 Piton de La Fournaise - Histogram representing the number of surface volcano-tectonic earthquakes recorded in March 2020 (© OVPF-IPGP).

 Piton de La Fournaise - Histogram representing the number of surface volcano-tectonic earthquakes recorded in March 2020 (© OVPF-IPGP).

Piton de La Fournaise - Illustration of the deformation over the last six months (October 1, 2019 - March 31, 2020) the eruptive and intrusive periods are shown in red and green respectively. Here are shown the variations in distance between two GPS receivers crossing the Piton de la Fournaise building, at the top (reference SNEG; top), at the base of the terminal cone (reference FJAG; in the middle) and in the far field (reference PRAG ; below) (see location in Figure 5). An increase is synonymous with elongation and therefore swelling of the volcano; conversely, a decrease is synonymous with contraction and therefore deflation of the volcano (© OVPF-IPGP)

Piton de La Fournaise - Illustration of the deformation over the last six months (October 1, 2019 - March 31, 2020) the eruptive and intrusive periods are shown in red and green respectively. Here are shown the variations in distance between two GPS receivers crossing the Piton de la Fournaise building, at the top (reference SNEG; top), at the base of the terminal cone (reference FJAG; in the middle) and in the far field (reference PRAG ; below) (see location in Figure 5). An increase is synonymous with elongation and therefore swelling of the volcano; conversely, a decrease is synonymous with contraction and therefore deflation of the volcano (© OVPF-IPGP)

Since 2016, replenishments of the surface magmatic reservoir under the Piton de la Fournaise have been done in pulses, so such phases of lull in deformations and seismicity have already been observed several times between 2016 and 2019 over periods ranging from 15 to around 80 days.

The still high values ​​of CO2 fluxes in the far field soil show that deeper magma ascent (at the level of the mantle) continues but that these have not yet reached the surface reservoir, at the end of March.

Piton de La Fournaise - seismic cries on 02.04.2020 - (© OVPF-IPGP). - one click to enlarge.

Piton de La Fournaise - seismic cries on 02.04.2020 - (© OVPF-IPGP). - one click to enlarge.

A seismic crisis was recorded on the instruments of the Volcanological Observatory of Piton de la Fournaise this April 2, with 92 superficial volcano-tectonic earthquakes detected between 8:15 am and 8:51 am local time.

This seismic crisis was accompanied by rapid deformation (of the order of 10-20 micro-radians). This indicates that magma has left the surface magmatic reservoir and has spread to the surface.

 This seismic crisis, like the signals, shows:
1) a resumption of seismicity in general under the Piton de la Fournaise massif since March 30,

2) accompanied by a resumption of building inflation for two days,
show that the superficial magmatic reservoir pressurizes again.

 A rash is therefore not ruled out in the medium term.

Alert level: Alert 1

 

Sources:

- OVPF - Monthly bulletin for March 2020. - link

- OVPF - Activity bulletins of April 2, 2020 - link

Santiaguito - 01.04.2020 / 2:45 p.m. - photo Insivumeh

Santiaguito - 01.04.2020 / 2:45 p.m. - photo Insivumeh

In Guatemala, the Santiaguito presented on April 1, 2020 a plume of vapors, accompanied by a little ash 400 meters above the summit, drifting west and southwest over the Palajuno area and the villages of Loma Linda and San Marcos; the explosions remain weak.

 

Sources: Conred & Insivumeh

Ebeko - photo archive 20.01.2020 / Leonid Kotenko

Ebeko - photo archive 20.01.2020 / Leonid Kotenko

In the Northern Kurils, the Ebeko continues its eruptive activity; it is weak and characterized this April 1 by a plume of ash at 1,700 meters asl. , drifting northeast from the volcano for 5 km., according to observations by volcanologists based in Severo-Kurilsk.

The aviation code remains orange, ashes explosions can affect aviation at low altitude.

 

Sources: KVERT & VAAC Tokyo

Popocatépetl - 03.31.2020 / 9.58pm - WebcamsdeMexico

Popocatépetl - 03.31.2020 / 9.58pm - WebcamsdeMexico

Popocatépetl - 01.04.2020 / 02h06 - WebcamsdeMexico

Popocatépetl - 01.04.2020 / 02h06 - WebcamsdeMexico

In the past 24 hours, the Popocatépetl volcano monitoring system has identified 100 exhalations accompanied by water vapor, volcanic gases and slight amounts of ash, as well as an explosion on March 31 at 10:08 a.m.

In addition, there were 500 minutes of tremors, and three volcano-tectonic earthquakes with a calculated magnitude of 1.7, 2.1 and 1.7, respectively.

Since 10 a.m. on April 1, there has been an emission of volcanic gases and slight amounts of ash scattered west-southwest.

The alert remains set to amarillo Fase 2.

 

Sources: Cenapred

Popocatépetl - summary of activity over the past 24 hours - Cenapred / CNPC / Seguridad

Popocatépetl - summary of activity over the past 24 hours - Cenapred / CNPC / Seguridad

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Nevados de Chillan - 29.03.2020 / 9.44 p.m. - Webcam Sernageomin

Nevados de Chillan - 29.03.2020 / 9.44 p.m. - Webcam Sernageomin

At the Nevados de Chillan volcanic complex, explosive activity was recorded on March 29 at around 6:38 p.m. local, with a scattering of ash at low altitude in an east-southeast direction.

It continued on March 30, with grayish emissions reaching a maximum of 1,400 meters.

Volcano-tectonic earthquakes dominate at the seismicity level.

The technical alert is maintained in Amarilla

 

Sources: Sernageomi & Volcanes de Chile

Stromboli - 03.31.2020 - lava overflow in the Scira del Fuoco, at 2:35 and 4:47 respectively - SPCT / INGV OE webcam
Stromboli - 03.31.2020 - lava overflow in the Scira del Fuoco, at 2:35 and 4:47 respectively - SPCT / INGV OE webcam

Stromboli - 03.31.2020 - lava overflow in the Scira del Fuoco, at 2:35 and 4:47 respectively - SPCT / INGV OE webcam

The National Institute of Geophysics and Volcanology, Etnean Observatory, informs that the surveillance networks recorded from 23:40 hours UTC approximately on March 30, 2020, a lava overflow from the crater terrace of Stromboli; lava reached the coast line at approximately 1:50 a.m. UTC on March 31.

At the same time as volcanic phenomenology, there is a seismic signal associated with episodes of rolling incandescent blocks along the Sciara del Fuoco and small landslides that generate clouds of dust.

 

Sources : INGV OE & L.G.S.

Stromboli - lava flow in Sciara del Fuoco - 31.03.2020 / à   01h45 and  6h48  -Doc. LGS

Stromboli - lava flow in Sciara del Fuoco - 31.03.2020 / à 01h45 and 6h48 -Doc. LGS

Stromboli - sismogram 31.03.2020 between 01h and 6h45 - Doc. Seismo-acoustic network LGS

Stromboli - sismogram 31.03.2020 between 01h and 6h45 - Doc. Seismo-acoustic network LGS

Sabancaya - summary of the activity between 23 and 29 March 2020 - Doc. I.G.Peru

Sabancaya - summary of the activity between 23 and 29 March 2020 - Doc. I.G.Peru

The eruptive activity of the Sabancaya volcano remained at moderate levels between March 23 and 29, with the continuous recording of moderate explosions and the consequent emission of ash and gas. Consequently, for the following days, no significant change is expected regarding its activity.

During the aforementioned period, the IGP recorded and analyzed the occurrence of approximately 536 earthquakes of volcanic origin, associated with the circulation of fluids (magma, gas, etc.) inside the volcano and accompanied columns of gas and ash up to 3 km high above the summit of the volcano, scattered towards the western, southwest and southern sectors of Sabancaya.

In addition, 16 medium to low intensity daily explosions were recorded on average. The monitoring of the deformation of the volcanic structure records significant anomalies.

Satellite surveillance has enabled the presence of 5 thermal anomalies with values ​​between 2MW and 13 MW, associated with the presence of a surface lava body in the crater of the volcano.

The volcanic alert level in orange and it is recommended not to approach within a radius of 12 km.

 

Source: IG Peru
 

Taal - main crater - taken by drone / Phivolcs archives - Raffy Tima

Taal - main crater - taken by drone / Phivolcs archives - Raffy Tima

In Taal volcano, March 29 was marked by 93 volcanic earthquakes, associated with the fracturing of rocks, including 6 of magnitude between M1.8 and M3.4, felt in the barangays Banyaga, Bilibinwang and Subic Ilaya.

Low emissions of steam plumes are observed at the main crater and at the vents along Daang Kastila Road.

On March 30, the emissions observed reached only 50 to 100 meters in height, drifting to the southwest. THE number of volcanic earthquakes has decreased and is now only 17 events.

The alert level remains at 1 / abnormal; the prohibited zones remain around the main crater and the Daang Kastila crack.

 

Source: Phivolcs

 Reykjanes Peninsula - 30.03.2020 / 5:50 pm - location and magnitude of earthquakes - Doc.IMO
 Reykjanes Peninsula - 30.03.2020 / 5:50 pm - location and magnitude of earthquakes - Doc.IMO

 Reykjanes Peninsula - 30.03.2020 / 5:50 pm - location and magnitude of earthquakes - Doc.IMO

In Reykjanes Peninsula, activity in Grindavík remained high this week after a swarm of earthquakes that started on March 12. This is the same area as where previous earthquake swarms occurred earlier this year.

About 1,000 earthquakes have been located on the Reykjanes Peninsula. The biggest earthquake of the week was M4.2 on March 18, about 5 km NW of Gunnuhver on the Reykjanes Peninsula. The earthquake was widely felt in the southwestern part of Iceland. On March 19, an M3.5 earthquake occurred 3.5 km NW of Grindavík. An M3.0 earthquake occurred on March 20 by Kleifarvatn on the Reykjanes Peninsula, where a small swarm of earthquakes occurred on the same day.

On March 28, 2020, an earthquake swarm occurred on the Reykjanes Ridge. The largest earthquakes in this swarm had a magnitude of Mw3.5. A total of seven earthquakes occurred which were greater than the magnitude Mw3.0.

 

Source: IMO

Reykjanes ridge and peninsula - location and magnitude of the earthquakes of March 29 and 30 / 1:25 p.m. - Doc. IMO
Reykjanes ridge and peninsula - location and magnitude of the earthquakes of March 29 and 30 / 1:25 p.m. - Doc. IMO
Reykjanes ridge and peninsula - location and magnitude of the earthquakes of March 29 and 30 / 1:25 p.m. - Doc. IMO
Reykjanes ridge and peninsula - location and magnitude of the earthquakes of March 29 and 30 / 1:25 p.m. - Doc. IMO

Reykjanes ridge and peninsula - location and magnitude of the earthquakes of March 29 and 30 / 1:25 p.m. - Doc. IMO

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 Merapi - 28.03.2020 / 19h26 - explosive eruption - screenshot of the video BPPTKG

Merapi - 28.03.2020 / 19h26 - explosive eruption - screenshot of the video BPPTKG

An eruption occurred at Merapi on on Saturday, March 28, 2020 at 7:25 p.m. West Indonesia time, with an ash column height observed at ± 3000 m above the summit (± 5968 m above sea ​​level). It was observed that the ash column was gray with thick intensity, and directed towards the west. This eruption was recorded on a seismogram with a maximum amplitude of 75 mm and a duration of 243 seconds.

Merapi - 28.03.2020 / 19h26 - explosive eruption - screenshot of the video Volvano YT i Frekom

Merapi - 28.03.2020 / 19h26 - explosive eruption - screenshot of the video Volvano YT i Frekom

March 28, 2020, ~ Eruption ~ Mount Merapi, Indonesia ~ Via VolcanoYT & Frekom

Merapi - 28.03.2020 / 19:26 - Seismogram in UTC time - Doc. Magma Indonesia

Merapi - 28.03.2020 / 19:26 - Seismogram in UTC time - Doc. Magma Indonesia

Merapi - 28.03.2020 / 7:27 p.m. - Doc. BPPTKG

Merapi - 28.03.2020 / 7:27 p.m. - Doc. BPPTKG

Another eruption occurred at Merapi on Sunday, March 29, 2020 at 12:15 a.m. Western Indonesia time, the height of the ash plume being observed at ± 1500 m above the summit. It was observed that the ash column was gray with thick intensity, and directed towards the west. This eruption was recorded on a seismogram with a maximum amplitude of 40 mm and a duration of 150 seconds.

 Merapi - 03.29.2020 / 00:19 am loc. - Doc.BPPTKG

 Merapi - 03.29.2020 / 00:19 am loc. - Doc.BPPTKG

Merapi - 28.03 - 29.03.2020 - Seismogram in UTC time - Doc. Magma Indonesia

Merapi - 28.03 - 29.03.2020 - Seismogram in UTC time - Doc. Magma Indonesia

People are advised to stay calm and not to panic. The alert activity level remains at 2 / waspada. The danger distance is set at a radius of 3 km from the summit of Merapi. Outside this radius, the community can move as usual.

 

Sources: PVMBG, BPPTKG, Magma Indonesia

Stromboli - 28.03.2020 - overflow of the terrace in the sciara del Fuoco, respectively at 7:06 p.m. / LGS and 7:09 p.m. / INGV OE - one click to enlargeStromboli - 28.03.2020 - overflow of the terrace in the sciara del Fuoco, respectively at 7:06 p.m. / LGS and 7:09 p.m. / INGV OE - one click to enlarge

Stromboli - 28.03.2020 - overflow of the terrace in the sciara del Fuoco, respectively at 7:06 p.m. / LGS and 7:09 p.m. / INGV OE - one click to enlarge

This March 28, 2020 at 16:44 UTC, the geophysical monitoring network of the Laboratory of experimental geophysics #LGS of the Department of Earth sciences of the University of Florence recorded an increase in the seismic tremor at Stromboli, accompanied by events of roll (such as "rockfall"), the longest of which (approximately 3 minutes) took place at 16:57 UTC.

This phase of increase in tremors is associated with an overflow, that is to say an overflow of lava, from the NE crater as in the images of the Labronzo camera and caused the collapse of small portions of the edge of the crater.

 

At the moment, there is no significant change in the other parameters monitored. This activity is still ongoing.

 

Source: LGS

 Popocatépetl - 28.03.2020 / 08h16 - WebcamsdeMexico

 Popocatépetl - 28.03.2020 / 08h16 - WebcamsdeMexico

 Popocatépetl - 28.03.2020 / 08h29 - WebcamsdeMexico

 Popocatépetl - 28.03.2020 / 08h29 - WebcamsdeMexico

In the past 24 hours, 128 exhalations have been identified at Popocatépetl, accompanied by water vapor, volcanic gases and small amounts of  ash. Emissions of ash dispersed in the northwest sector (NW). So far, there have been no reports of ash falling. WebcamsdeMexico posted photos of the activity at 8:16 a.m., 8:29 a.m. and 11:55 a.m., viewed from San Nicolás de los Ranchos, Puebla.

In addition, 967 minutes of tremor were recorded.

At the time of this report / 11h local, and from an hour, an emission of volcanic gases and slight amounts of ash dispersed to the northwest (NW) are observed.

The alert level remains at Amarillo Fase 2

 

Sources: Cenapred & Mexico City webcams

 Popocatépetl - 28.03.2020 / 11.58 am - WebcamsdeMexico

 Popocatépetl - 28.03.2020 / 11.58 am - WebcamsdeMexico

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 Merapi - 27.03.2020 / 9.44 p.m. - photo Sarkaliurang via BPPTKG

 Merapi - 27.03.2020 / 9.44 p.m. - photo Sarkaliurang via BPPTKG

After the Merapi's eruption of March 27 at 10:56 a.m. loc. (see yesterday's article), a second eruption occurred in the evening, around 9:40 p.m. local, less strong and accompanied by a plume culminating at 1,000 meters, before being knocked down by the winds to the west of the volcano. The trace on the seismogram has an amplitude of 40 mm and a duration of 180 seconds.

The PVMBG also informs for this day two avalanche earthquakes, 20 blast earthquakes, and three hybrid earthquakes.

VAAC Darwin maintains a red aviation code, ashes may be present at flight altitude 230.

The activity level remains at 2 / waspada.

 

Sources: PVMBG, Magma Indonesia, BPPTKG and Vaac Darwin.

 Merapi - 27.03.2020 / 9:44 p.m. - Doc. BPPTKG

 Merapi - 27.03.2020 / 9:44 p.m. - Doc. BPPTKG

Merapi - seismogram of 27.03.2020, showing the 2 eruptions of 03.54 and 14.40 UTC - Doc. Magma Indonesia

Merapi - seismogram of 27.03.2020, showing the 2 eruptions of 03.54 and 14.40 UTC - Doc. Magma Indonesia

Seismicity remains high at Shishaldin, with low level continuous tremor recorded in the past week.

A weak gas plume was commonly observed on webcam images when the views were clear, and high surface temperatures were observed on satellite images.

Eruptive activity appears to be confined to the summit area during this latest period of unrest, which began in mid-March. However, activity could increase with little or no warning, causing lava flows outside the crater, lahars and ash emissions.

The volcanic alert is Watch, and the aviation code orange.

The Shishaldin is monitored by local seismic and infrasound sensors, satellite data, web cameras, a geodesic and rangefinder network, and remote infrasound and lightning networks.

 

Source: AVO

Shishaldin - gas plume of 03.22.2020 / 12 p.m. - photo McConnell, Angela / via AVO

Shishaldin - gas plume of 03.22.2020 / 12 p.m. - photo McConnell, Angela / via AVO

A moderate explosive eruption of the volcano continues at Klyuchevskoy ; a strombolian activity and gas-vapor emission was noted all week.

Vulcanian activity was noted on March 20 and 25, ash plumes extending east and northeast of the volcano, over 130 km.

Satellite data showed a brilliant thermal anomaly over the summit volcanic crater all week.

This moderate explosive eruption of the volcano continues, and ash explosions up to 5-7 km a.s.l. could happen at any time. The current activity could affect low altitude aviation. The aviation code remains orange.

 

Sources: KVERT & Mirova
 

Klyuchevskoy - thermal anomalies on 28.03.2020 / 02h25 - Doc. Mirova
Klyuchevskoy - thermal anomalies on 28.03.2020 / 02h25 - Doc. Mirova

Klyuchevskoy - thermal anomalies on 28.03.2020 / 02h25 - Doc. Mirova

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 Merapi - eruptive plume of 03.23.2020 / at 10.54 am and 11.00 am - photos BPPTKG
 Merapi - eruptive plume of 03.23.2020 / at 10.54 am and 11.00 am - photos BPPTKG

Merapi - eruptive plume of 03.23.2020 / at 10.54 am and 11.00 am - photos BPPTKG

The Merapi, on Java, still in activity level 2 / waspada, presented on March 27 an eruption (presumably phreatic) at 10.56 loc., characterized by an ash plume estimated at 5,000 meters above the summit and a trace on the seismogram 75 mm amplitude; the earthquake linked to this episode lasted 500 sec.

VAAC Darwin reports ash at flight altitudes 100 and 250, disconnected from the summit, heading southeast. The aviation code is red.

 

The PVMBG also reports, by March 27:

- an avalanche earthquake of 18 sec. / slip distance and direction not observed.

- 10 blast earthquakes, 5 low frequency earthquakes and a shallow volcanic earthquake, of amplitude 7 mm and with a duration of 18 sec.

 

The seismicity of March 16 was characterized by:

- 1 avalanche earthquake, of 15 mm amplitude and with a duration of 22.92 sec.

- 2 hybrid earthquakes, and 2 tectonic earthquakes.

 

Sources: PVMBG, BPPTKG & Magma Indonesia

Merapi - seismogram of 27.03.2020 / UTC hours - Doc.Magma Indonesia

Merapi - seismogram of 27.03.2020 / UTC hours - Doc.Magma Indonesia

 Merapi - 27.03.2020 / 05:00 UTC - Doc.Citra Himawari  - BMKG

Merapi - 27.03.2020 / 05:00 UTC - Doc.Citra Himawari - BMKG

In the past 24 hours, Cenapred has identified 147 exhalations at Popocatépetl, accompanied by gas, a little ash, and two minor explosions, respectively on March 25 at 4:10 p.m. and March 26 at 2:00 a.m.

Meanwhile, the constant emission of volcanic gases, sporadically accompanied by slight amounts of ash is reported, dispersed towards the NNO.

At the seismicity level, 653 minutes of low amplitude tremor and two volcano-tectonic earthquakes were recorded, respectively from M1.2 at 4:34 p.m. on March 25 and from M2.3) at 8:55 a.m. on March 26.

The volcanic alert remains fixed at Amarillo Fase 2.

 

Source: Cenapred / CNPC / Seguridad

Popocatépetl - summary of the activity of 26.03.2020 - Doc. Cenapred / CNPC / Seguridad

Popocatépetl - summary of the activity of 26.03.2020 - Doc. Cenapred / CNPC / Seguridad

An explosion occurred in Manam, Papua New Guinea, generating a plume of about 3,000 meters above sea level and reported by the VAAC Darwin via RNZ.

Manam's last activity dates back to November 2019.

Islanders displaced by the previous series of eruptions are still awaiting proper resettlement on the continent.

 

Source: RNZ & Sentinel-2

 Manam - hot spots visible on these images from 20.03.2020 Sentinel-2 L1C bands 12,4,2 and bands 12,11,4 - one click to enlarge
 Manam - hot spots visible on these images from 20.03.2020 Sentinel-2 L1C bands 12,4,2 and bands 12,11,4 - one click to enlarge

 Manam - hot spots visible on these images from 20.03.2020 Sentinel-2 L1C bands 12,4,2 and bands 12,11,4 - one click to enlarge

Manam - Sentinel-2 L1C image from 2020-03-25 bands 12,11,4

Manam - Sentinel-2 L1C image from 2020-03-25 bands 12,11,4

As a bonus, a photo of Etna this morning all in white, the snow-capped peaks topped with a white plume also

 

Source: EtnaWalk Photo / Etna Map

Etna - Symphony of white on 27.03.2020 in the morning - photo EtnaWalk

Etna - Symphony of white on 27.03.2020 in the morning - photo EtnaWalk

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