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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
 Pacaya - ESPECIGEST / Facebook photo 15.06.2020

Pacaya - ESPECIGEST / Facebook photo 15.06.2020

 Pacaya - ESPECIGEST / Facebook photo 15.06.2020

Pacaya - ESPECIGEST / Facebook photo 15.06.2020

In Pacaya / Guatemala, three lava flows, longer than 150 meters, are observed from the MacKenney crater; two north and one west.

During the night and in the morning, the Strombolian explosions eject incandescent materials at 25-50 meters in height. In addition, a slight white plume is observed moving towards the southwest

A thermal anomaly, of VRP 167MW (high) is reported by Mirova this June 16 at 5:15 p.m.

Guides and tourists are advised to restrict climbs to the MacKenney and active lava flows, and to remain in alert to avalanches of boulders in areas of steep slopes.

 

Sources: Insivumeh & Mirova

Nevado del Ruiz - photo SGC archives

Nevado del Ruiz - photo SGC archives

In Colombia, the Nevado del Ruiz volcano has continued to exhibit behavioral instability in the past week.

The SGC reports an increase in seismicity in relation to rock fracturing, the occurrence of several episodes of the drumbeat type, and an increase in the number of events related to the dynamics of internal fluids and their energy.

Small gas and ash emissions were noted, with dispersion towards the WNW; the plumes have reached max. 1.000 meters above the summit

No noticeable change in surface deformation.

The activity level remains at Amarillo / 3

 

Source: Servicio Geologico Colombiano - Manizales - 16.06.2020 / 21:35 local

Kick'em Jenny - 3D Bathymetry  with gas emissions - Credit Imperial College London / April 2017

Kick'em Jenny - 3D Bathymetry with gas emissions - Credit Imperial College London / April 2017

Following an increase in the seismic activity of the underwater volcano Kick 'em Jenny, in the volcanic arc of the Lesser Antilles, observed over a period of seven days in June - a swarm of more than 1,400 volcanic earthquakes of M <1 , 8 -, the National Disaster Management Agency (NaDMA) issued a vigilance notice on June 14, 2020.

Although the alert level remained at Yellow / 2, with a 1.5 km marine exclusion zone around the submerged summit of the volcano, the corner is to be avoided, even between eruptions: the release of large quantities of gas bubbles from the volcano, without signs of this surface activity, can decrease the density of seawater above the vent, and decrease the lift of the water.

Any navigator is therefore reminded that the 1.5 km exclusion zone must continue to be observed.

As a reminder, in August 1944, the Island Queen, a wooden schooner, disappeared between the islands of Grenada and St Vincent, without leaving any debris.

The volcano is under surveillance by the University of the West Indies Seismic Research Center of the Trinidad and Tobago Campus (UWI SRC) and the NaDMA.

 

Sources:

- NaDMA and UWI SRC

- Global Volcanism Program - Kick 'em Jenny - link

Location and position monitoring means Kick 'em Jenny in the Lesser Antilles - NaDMA map

Location and position monitoring means Kick 'em Jenny in the Lesser Antilles - NaDMA map

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
Nevados de Chillan - aerial view from the northeast of the Nicanor crater (in red) and the dome in the center. - photo archive Vulcanologia en Chile 02.2018

Nevados de Chillan - aerial view from the northeast of the Nicanor crater (in red) and the dome in the center. - photo archive Vulcanologia en Chile 02.2018

From the analysis of satellite images of the Nevados de Chillan complex, it is possible to observe the location of a new magmatic body inside the active crater (Nicanor) with an elliptical morphology of NW-SE orientation ( similar to the one formed at the end of 2017 - see photo).

The presence of thermal anomalies coincides with the location of the magmatic body / lava dome. In addition, the deformation stations detected vertical variations and since June 10, explosive activity is associated with long-term seismicity (LP; movement of fluids) and tremors with harmonic characteristics, which demonstrate the extrusion of wash.

 

Considering recent morphological changes and surveillance parameters, the Sernageomin hopes for an explosive scenario of moderate magnitude, with the occurrence of eruptive columns up to 5,000 meters in height, ballistic projections; ash falls, avalanches generating pyroclastic flows that can impact an O-SW sector. Given the snow cover and / or the rains, small lahars could form in the quebradas north and northeast of the active crater.

The volcanic technical alert is maintained in Amarilla

 

Source: Sernageomin

Makushin - photo Makushin summit hike by Jacob Whitaker, August 8, 2019.

Makushin - photo Makushin summit hike by Jacob Whitaker, August 8, 2019.

In the past few hours, there have been two earthquakes of magnitude greater than 4 in the vicinity of the Makushin volcano, in the Aleutian arc. This represents a significant deviation from the background seismic activity and may be associated with volcanic disturbances. As a result, the aviation color code and the volcano alert level have been increased to Yellow / Advisory.

These disorders could lead to a future rash, but it is not a certainty. Aftershocks are continuing, as one would expect with earthquakes of this magnitude. The volcano is monitored with a network of seismic instruments, a web camera, GPS, satellite data and regional instruments for detecting infrasound and lightning.

 

 

The Makushin volcano is located on the north of Unalaska Island in the eastern Aleutian Islands. Makushin is a large ice-covered stratovolcano that rises to an altitude of 6,680 feet. The summit caldera, 3 km in diameter, is the site of frequent eruptions of steam and minor ash; however, no major eruptions have occurred during this century. The community of Unalaska and the port of Dutch Harbor are located 25 km (16 miles) east of the Makushin volcano. (Map location via AVO)

 

Source: AVO

Sabancaya - summary of the activity between 8 and 14 June 2020 - Doc. I.G.Peru

Sabancaya - summary of the activity between 8 and 14 June 2020 - Doc. I.G.Peru

The Geophysical Institute of Peru (IGP) reports that the eruptive activity of the Sabancaya volcano remains at moderate levels, with the continuous recording of explosions, on average 16 per day, accompanied by plumes of ash and gas up to 2 , 2 km high above the summit of the volcano, scattered towards the southwest, south and southeast sectors.

The IGP recorded and analyzed the occurrence of approximately 498 earthquakes of volcanic origin, associated with the circulation of fluids (magma, gas, etc.) inside the Sabancaya volcano.

The monitoring of the deformation of the volcanic structure, using GNSS data (processed with fast orbits), does not present any significant anomalies; However, slight inflation was recorded in the north and southeast sector of Sabancaya. Satellite surveillance identified the presence of 5 thermal anomalies with values ​​between 2MW and 19MW, associated with the presence of a lava dome in the crater of the volcano, being destroyed due to explosive activity.

The alert level remains at Naranja, with a 12 km prohibited area around the crater.

 

Source: I.G. Peru

Nishinoshima - photo of the overview by the Japan Coast Guards on 06.15.2020 / 3:20 p.m.

Nishinoshima - photo of the overview by the Japan Coast Guards on 06.15.2020 / 3:20 p.m.

VAAC Tokyo has regularly issued notices of ash emissions from Nishinoshima in the Ogasawara Islands, since June 12.

They continue this June 16, with a brown-black plume emitted at about 2,000 meters, doubled with plumes of gas and vapor emitted by lava flows and their entry into the sea.

 

Source: VAAC Tokyo and Japan Coast Guards

Nishinoshima - volcanic ash advisory for 15 and 16.06.2020 - Doc. VAAC Tokyo - one click to enlargeNishinoshima - volcanic ash advisory for 15 and 16.06.2020 - Doc. VAAC Tokyo - one click to enlarge

Nishinoshima - volcanic ash advisory for 15 and 16.06.2020 - Doc. VAAC Tokyo - one click to enlarge

Nishinoshima -thermal anomaly at 16.06.2020 /  03h55 - Doc. Mirova_MODIS_Latest10NTI

Nishinoshima -thermal anomaly at 16.06.2020 / 03h55 - Doc. Mirova_MODIS_Latest10NTI

Nishinoshima - photo of the overview by the Japan Coast Guards on 06.15.2020 / 3:17 p.m.

Nishinoshima - photo of the overview by the Japan Coast Guards on 06.15.2020 / 3:17 p.m.

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
Pacaya - 13.06.2020 - Two emission points of lava flows are identifiable: the McKenney and another one hundred meters below the summit - Image Sentinel-2 bands 12,11,5 - Doc. Insivumeh - one click to enlarge

Pacaya - 13.06.2020 - Two emission points of lava flows are identifiable: the McKenney and another one hundred meters below the summit - Image Sentinel-2 bands 12,11,5 - Doc. Insivumeh - one click to enlarge

Pacaya - 06.13.2020 - the two emission points of the flows on this image Sentinel Hub bands 12,11,4 - one click to enlarge

Pacaya - 06.13.2020 - the two emission points of the flows on this image Sentinel Hub bands 12,11,4 - one click to enlarge

In Guatemala, the MacKenney crater of the Pacaya presents strombolian explosions observed during the night and early morning of June 14, 2020, with the expulsion of incandescent materials from 50 to 100 meters above the crater. During the day, the activity is marked by a white fumarole, which the wind disperses to the west and northwest.

A lava flow about 250 meters long is observed in a northern direction, which emerges from an eruptive focus on the north flank, about 100 meters below the crater. These two sources of lava can be identified on a Sentinel-2 bands 12,11,5 image from June 13 / Insivumeh

The PCG and PCG5 seismic stations record tremors associated with the rise of magma and gases.

 

Source: Insivumeh

 Sheveluch - 15.06.2020 / 06:21 - photo IVS FEB RAS KVERT

Sheveluch - 15.06.2020 / 06:21 - photo IVS FEB RAS KVERT

In Sheveluch, the growth of the lava dome continues, characterized by explosions and ash plumes emitted at more than 5,000 meters asl. before drifting northeast.

Sheveluch - hot spot of 14.06.2020 / 06:44 - Modvolc Hawaii

An incandescence marks the dome and the avalanches of blocks which accompany the process.A moderate thermal anomaly is reported by Mirova for the period from June 8 to 14, 2020.

Aviation code stays orange

 

Sources: KVERT & Mirova

Sheveluch - moderate thermal anomaly on 14.06.2020 / 2:25 p.m. - Doc. Mirova_MODIS_logVRP

Sheveluch - moderate thermal anomaly on 14.06.2020 / 2:25 p.m. - Doc. Mirova_MODIS_logVRP

On Saturday June 13, with the support of the National Guard, expert staff from the Geophysical Institute of the National Autonomous University of Mexico (UNAM) and the National Center for Disaster Reduction (CENAPRED), an overview of the Popocatépetl volcano found that the internal crater maintains a diameter of 350 to 380 meters and the approximate depth is 100 to 150 meters, which is covered with tephra. At the bottom, remains of materials from a dome, probably put in place in May, were observed.

Cenapred reports 2 explosions on June 5, one on June 8, and one on June 13, 2020.

Popocatépetl - the summit and the crater during the overflight on 13.06.2020 - doc. Cenapred / CNPC / Seguridad

Popocatépetl - the summit and the crater during the overflight on 13.06.2020 - doc. Cenapred / CNPC / Seguridad

Popocatépetl - Interior of the crater during the overflight on 13.06.2020 - doc. Cenapred / CNPC / Seguridad

Popocatépetl - Interior of the crater during the overflight on 13.06.2020 - doc. Cenapred / CNPC / Seguridad

In the past 24 hours, using the Popocatépetl volcano monitoring system, 225 exhalations have been identified, accompanied by water vapor, volcanic gases and sometimes small amounts of ash. In addition, 295 minutes of tremor were recorded.

In the morning there is a slight emission of vapor and gas moving south-east (SE)

The volcanic alert remains Amarillo fase 2

 

Source: Cenapred - report of 14.06.2020

Popocatépetl - exhalation on 14.06.2020 / 06:19 - WebcamsdeMexico

Popocatépetl - exhalation on 14.06.2020 / 06:19 - WebcamsdeMexico

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
Activity of Sangay, Fuego, Rincon de La Vieja, Stromboli and in the Reykjanes peninsula.

In Ecuador, the explosive activity of Sangay continues on June 13, 2020.

Emissions of gas and ash are observed via the camera ECU911, dispersing towards the southwest; VAAC Washington issued two ash dispersion notices, including one at 2:11 p.m. UTC at a flight altitude of 230 / 7,000 meters, moving SW for 15-20 km. Ash falls affect the provinces of Chimborazo, Cotopaxi, Tungurahua and Bolivar.

During the morning, the IGEPN observed the descent of incandescent materials on the SE flank.

The observatory notes a significant accumulation of pyroclastic materials on the flanks of the volcano, likely to be remobilized in the event of rain, with mudslide and / or lahars.

The alert level remains Amarillo, with recommendation from, do not access the rios of the sector.

 

Sources: IGEPN and VAAC Washington.

Sangay - Volcani ash advisory for 13-14.06.2020 Doc. VAAC Washington / SANG0573

Sangay - Volcani ash advisory for 13-14.06.2020 Doc. VAAC Washington / SANG0573

Since June 12, the INSIVUMEH network of seismic stations and acoustic sensors has recorded a change in the eruptive pattern of Volcán de Fuego.

Fuego - RSAM (seismic amplitude) graph of the FG16 station. It shows how the seismic amplitude has gradually increased due to the continuous extrusion of material in the crater. This increase shows that the lava flow started to form last night and was fed with magma material. - Doc. Insivumeh

Fuego - RSAM (seismic amplitude) graph of the FG16 station. It shows how the seismic amplitude has gradually increased due to the continuous extrusion of material in the crater. This increase shows that the lava flow started to form last night and was fed with magma material. - Doc. Insivumeh

 5000/5000 Nombre maximal de caractères : 5000 Activity of Sangay, Fuego, Rincon de La Vieja, Stromboli and in the Reykjanes peninsula. Activity of Sangay, Fuego, Rincon de La Vieja, Stromboli and in the Reykjanes peninsula. In Sangay, the explosive activity continues on June 13, 2020.  Emissions of gas and ash are observed via the camera ECU911, dispersing towards the southwest; VAAC Washington issued two ash dispersion notices, including one at 2:11 p.m. UTC at a flight altitude of 230 / 7,000 meters, moving SW for 15-20 km. Ash falls affect the provinces of Chimborazo, Cotopaxi, Tungurahua and Bolivar.  During the morning, the IGEPN observed the descent of incandescent materials on the SE flank.  The observatory notes a significant accumulation of pyroclastic materials on the flanks of

5000/5000 Nombre maximal de caractères : 5000 Activity of Sangay, Fuego, Rincon de La Vieja, Stromboli and in the Reykjanes peninsula. Activity of Sangay, Fuego, Rincon de La Vieja, Stromboli and in the Reykjanes peninsula. In Sangay, the explosive activity continues on June 13, 2020. Emissions of gas and ash are observed via the camera ECU911, dispersing towards the southwest; VAAC Washington issued two ash dispersion notices, including one at 2:11 p.m. UTC at a flight altitude of 230 / 7,000 meters, moving SW for 15-20 km. Ash falls affect the provinces of Chimborazo, Cotopaxi, Tungurahua and Bolivar. During the morning, the IGEPN observed the descent of incandescent materials on the SE flank. The observatory notes a significant accumulation of pyroclastic materials on the flanks of

In the early hours of June 13, a new lava flow was observed in the direction of the Seca barranca located on the northwest flank of the volcano, about 250 meters long. This activity is accompanied by incandescent and almost constant degassing in the crater, avalanches which travel 1 km and reach the vegetation. Weak and moderate explosions are also observed and recorded which generate rumblings, shock waves and columns of ash up to 4800 m altitude.

The current activity is similar to that recorded from May 22 to 26, 2020, but this effusive activity generates a higher degassing which generates an acoustic signal with amplitudes of 0.7 to 1.5 Pa continuously over periods up to at 4 o'clock.

Effusive activity can intensify and even extend to another ravine, presenting block avalanches; it is recommended not to stay near or in the barrancas.

A notice of possible dispersion of ash up to 20 km in a south and southwest sector has been issued to civil aeronautics.

 

Source: Insivumeh

Fuego - thermal anomaly on 13.06.2020 - Doc.   Mirova _MODIS_Latest10NTI

Fuego - thermal anomaly on 13.06.2020 - Doc. Mirova _MODIS_Latest10NTI

Fuego - lava flow and avalanche of boulders in the Secanca barranca on 13.06.2020 - image Sentinel-2 bands 12,11,5 - Doc. Insivumeh

Fuego - lava flow and avalanche of boulders in the Secanca barranca on 13.06.2020 - image Sentinel-2 bands 12,11,5 - Doc. Insivumeh

In Costa Rica, Rincon de la Vieja, in activity level 3 / eruption (stable), presented this eruption on June 13 at 6:26 a.m., accompanied by a balnc plume which developed at 1,000 meters above the crater .

 

Source: Ovsicori

Rincon de La Vieja - 06.13.2020 / 6:26 am - Ovsicori video screenshot

Rincon de La Vieja - 06.13.2020 / 6:26 am - Ovsicori video screenshot

This week, the new thermal camera on the Pizzo sopra la Fossa of Stromboli was installed above the Stromboli Pit, replacing the thermal camera destroyed by the paroxysmal explosion of July 3, 2019. The operation was carried out by the staff of INGV-Etnéo Observatory, and the images are accessible by following this link.

 

Source: Boris Behncke

Stromboli - 13.06.2020 / 06:39 - Cam Pizzo / INGV OE

Stromboli - 13.06.2020 / 06:39 - Cam Pizzo / INGV OE

At 8:27 p.m. on June 13, an earthquake of magnitude M3.5 occurred approximately 3.7 km north of Grindavík, on the Reykjanes Peninsula. Residents of Grindavík felt the earthquake.

It is part of a swarm of earthquakes in progress since May 30, and about 2000 earthquakes have been detected there since, mainly small earthquakes, sometimes more intense, including 3 of M between 2.5 and 2 , 9 and one of M3.5 on June 13.

Observations of the area indicate signs of re-swelling around Þorbjörn.

The phase of uncertainty declared by civil protection due to this activity is still in force

 

Source: IMO

Reykjanes peninsula - location and magnitude of the earthquakes at 14.06.2020 / 6:55 am - Doc. IMO
Reykjanes peninsula - location and magnitude of the earthquakes at 14.06.2020 / 6:55 am - Doc. IMO
Reykjanes peninsula - location and magnitude of the earthquakes at 14.06.2020 / 6:55 am - Doc. IMO

Reykjanes peninsula - location and magnitude of the earthquakes at 14.06.2020 / 6:55 am - Doc. IMO

Reykjanes- parameters of the last 15 days, as of 13.06.2020 - Doc Vedur.is

Reykjanes- parameters of the last 15 days, as of 13.06.2020 - Doc Vedur.is

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
Sangay - photos taken by FlyToUio Aviador Ecuatoriano 10.06.2020 (via Infopinion / Twitter)

Sangay - photos taken by FlyToUio Aviador Ecuatoriano 10.06.2020 (via Infopinion / Twitter)

In the past 15 hours, an increase in volcanic activity has been observed in the Sangay volcano, in Ecuador.

This activity is characterized by a higher gas and ash emission height, reaching between 1.5 and 2.8 km above the crater level, an increase in the range of the ash cloud to the west, reaching more than 600 km from the volcano, and an increase in the number of thermal alerts on the southeast flank of the volcano associated with an increase in lava emissions.

Due to these circumstances, Sangay's activity is classified as HIGH with an upward trend.

Multiparametric graph of the activity of the Sangay volcano from May 2019 to June 12, 2020. a: seismic activity (number of events per day) detected at the PUYO station (source: IG-EPN); b: SO2 emissions (tonnes per day) detected by the Sentinel-5P satellite sensor (TROPOMI: red squares; source: MOUNTS) and by IGEPN (DOAS: green bars); c: height of the ash clouds (m above the crater level) detected by the GOES-16 satellite sensor (source: Washington VAAC); d: thermal emission power (megawatt) detected by the MODIS satellite sensor (source: MODVOLC) and estimate of the accumulated lava volume (millions of m3, the fine lines represent the error range). - Doc. IGEPN

Multiparametric graph of the activity of the Sangay volcano from May 2019 to June 12, 2020. a: seismic activity (number of events per day) detected at the PUYO station (source: IG-EPN); b: SO2 emissions (tonnes per day) detected by the Sentinel-5P satellite sensor (TROPOMI: red squares; source: MOUNTS) and by IGEPN (DOAS: green bars); c: height of the ash clouds (m above the crater level) detected by the GOES-16 satellite sensor (source: Washington VAAC); d: thermal emission power (megawatt) detected by the MODIS satellite sensor (source: MODVOLC) and estimate of the accumulated lava volume (millions of m3, the fine lines represent the error range). - Doc. IGEPN

Multiparametric graph of the activity of the Sangay volcano from May 2019 to June 12, 2020. a: seismic activity (number of events per day) detected at the PUYO station (source: IG-EPN); b: SO2 emissions (tonnes per day) detected by the Sentinel-5P satellite sensor (TROPOMI: red squares; source: MOUNTS) and by IGEPN (DOAS: green bars); c: height of the ash clouds (m above the crater level) detected by the GOES-16 satellite sensor (source: Washington VAAC); d: thermal emission power (megawatt) detected by the MODIS satellite sensor (source: MODVOLC) and estimate of the accumulated lava volume (millions of m3, the fine lines represent the error range). - Doc. IGEPN

Multiparametric graph of the activity of the Sangay volcano from May 2019 to June 12, 2020. a: seismic activity (number of events per day) detected at the PUYO station (source: IG-EPN); b: SO2 emissions (tonnes per day) detected by the Sentinel-5P satellite sensor (TROPOMI: red squares; source: MOUNTS) and by IGEPN (DOAS: green bars); c: height of the ash clouds (m above the crater level) detected by the GOES-16 satellite sensor (source: Washington VAAC); d: thermal emission power (megawatt) detected by the MODIS satellite sensor (source: MODVOLC) and estimate of the accumulated lava volume (millions of m3, the fine lines represent the error range). - Doc. IGEPN

 Sangay - thermal anomalies / Mirova and thermal alerts detected by the FIRMS system in the last 24 hours. / IGEPN 12.06.2020 - one click to enlarge Sangay - thermal anomalies / Mirova and thermal alerts detected by the FIRMS system during the last 24 hours. / IGEPN 12.06.2020 - one click to enlarge Sangay - thermal anomalies / Mirova and thermal alerts detected by the FIRMS system in the last 24 hours. / IGEPN 12.06.2020 - one click to enlarge Sangay - thermal anomalies / Mirova and thermal alerts detected by the FIRMS system during the last 24 hours. / IGEPN 12.06.2020 - one click to enlarge

Sangay - thermal anomalies / Mirova and thermal alerts detected by the FIRMS system in the last 24 hours. / IGEPN 12.06.2020 - one click to enlarge Sangay - thermal anomalies / Mirova and thermal alerts detected by the FIRMS system during the last 24 hours. / IGEPN 12.06.2020 - one click to enlarge

 Sangay - 11.06.2020 / 06:11 - cam ECU 911 / IGEPN

Sangay - 11.06.2020 / 06:11 - cam ECU 911 / IGEPN

This June 12, on GOES-16 satellite images, a continuous emission of ash from the Sangay volcano is observed, directed to the southwest and northwest. This activity could cause light to moderate ash falls in the provinces of Chimborazo, Tungurahua, Cotopaxi, Bolivar, Azuay, Cañar and Guayas.

Sangay - Ashes emitted in 2 directions - Goes satellite image -16 / 12.06.2020

Sangay - Ashes emitted in 2 directions - Goes satellite image -16 / 12.06.2020

The main phenomenon that can affect the population in the coming hours or days, associated with this activity, is the fall of the ashes. At the time of publication of the observatory report, the wind direction is towards the southwest, which could cause light to moderate ash falls in the provinces of Chimborazo, Cañar, Guayas, Azuay and El Oro. If the wind direction changes, it could affect other provinces.

The increase in materials at the head of the Volcán river could also lead to an increase in sediments and even lahars in the Volcán and Upano rivers.

 

Sources: IGEPN reports 2 - 3

Nishinoshima - activity during the overflight of 07.06.2020 / 12:25 by the Japan Coast Guards.

Nishinoshima - activity during the overflight of 07.06.2020 / 12:25 by the Japan Coast Guards.

In the Ogasawara Islands, the activity of Nishinoshima does not weaken, with many high thermal anomalies on June 11 and 12, 2020, listed between 46 and 578 MW.

The last overview by the Japan Coast Guards on June 7 shows an intense gas and ash emission activity at the crater of the pyroclastic cone, as well as the plumes of gas and vapor emitted by the arrival of lava at sea.

 

Sources: Japan Coast Guards & Mirova

Nishinoshima - the pyroclastic cone and its ash emissions on 07.06.2020 / 12:41 pm during the overflight by the Japan Coast Guards.

Nishinoshima - the pyroclastic cone and its ash emissions on 07.06.2020 / 12:41 pm during the overflight by the Japan Coast Guards.

Nishinoshima - thermal anomalies on 12 June / 04h20 - Doc. Mirova - one click to enlarge Nishinoshima - thermal anomalies on 12 June / 04h20 - Doc. Mirova - one click to enlarge

Nishinoshima - thermal anomalies on 12 June / 04h20 - Doc. Mirova - one click to enlarge

An IMO research team measured an increase in volcanic gases from the Icelandic volcano Grímsvötn.

The water surface of the subglacial lake in the caldera is high and a jökulhlaup (a glacial debacle) could occur in weeks / months, which can trigger an eruption following a discharge of weight on the magma chamber, according to Magnús Tumi Guðmundsson, professor of geophysics at the University of Iceland.

Higher seismic activity, increased geothermal energy, and magmatic gas flow indicate that Grímsvötn is preparing for an eruption, according Magnús Tumi.

The last major eruption of the Grimsvötn dates back to 2011, and emitted 0.8 km³ of tephra, preceded by smaller eruptions in 1998 and 2004.

 

Sources: Icelandic Met Office (IMO), EuroVolc, Visir and Iceland Review

Grimsvötn - field visit by IMO in June 2020 under the gases escaping from the volcano, and gas samples taken - source EuroVolc
Grimsvötn - field visit by IMO in June 2020 under the gases escaping from the volcano, and gas samples taken - source EuroVolc

Grimsvötn - field visit by IMO in June 2020 under the gases escaping from the volcano, and gas samples taken - source EuroVolc

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
 Sangay - effusion and lava flow 09.06.2020 / 18h51 - IGEPN cam. ECU 911

 Sangay - effusion and lava flow 09.06.2020 / 18h51 - IGEPN cam. ECU 911

The IGEPN gives details of the activity in progress at Sangay :

"These types of events can occur in the Sangay volcano, with more or less intensity, causing damage such as that recorded last night and early in the morning (June 8-9) due to the fall of ashes at the level At the proximal level, the lava front collapses generate pyroclastic density currents (pyroclastic flows) which are very dangerous and can affect the dynamics of the Volcán river and even of the Upano river, causing floods and mudslides ( lahars). Events with characteristics similar to the current one have occurred repeatedly (May 2019; July 2019; January; 2020) during the ongoing eruptive process which started in May 2019.

 

If ash remains in the environment, it is recommended not to be exposed and to protect the respiratory tract, eyes and skin. "


Source : IGEPN & VAAC Washington

Sangay - left: Satellite image showing the dispersion of 46 thermal anomalies in the past 24 hours in the Sangay volcano. (Source: FIRMS). - on the right: Warning of dispersion of the ash plume of the Sangay volcano, time 5:43 am TL. (https://www.ssd.noaa.gov/VAAC/ARCH20/GFX/SANG0553.jpg).

Sangay - left: Satellite image showing the dispersion of 46 thermal anomalies in the past 24 hours in the Sangay volcano. (Source: FIRMS). - on the right: Warning of dispersion of the ash plume of the Sangay volcano, time 5:43 am TL. (https://www.ssd.noaa.gov/VAAC/ARCH20/GFX/SANG0553.jpg).

Sangay - image of the GOES satellite 10.06.2020 / IGEPN - and Volcanic Ash advisory for 10.06.2020 / VAAC Washington
Sangay - image of the GOES satellite 10.06.2020 / IGEPN - and Volcanic Ash advisory for 10.06.2020 / VAAC Washington

Sangay - image of the GOES satellite 10.06.2020 / IGEPN - and Volcanic Ash advisory for 10.06.2020 / VAAC Washington

The Ebeko, in the northern Kurils, pursues a moderate eruptive activity.

The KVERT reports an explosion accompanied by an ash plume at 2,600 meters asl, drifting northeast from the volcano.

Aviation code stays orange

 

Source: KVERT 11.06.2020 / 03.32Z & VAAC Tokyo

Ebeko - volcanic ash advisory for 11.06.2020 / 04h54Z - Doc. VAAC Tokyo

Ebeko - volcanic ash advisory for 11.06.2020 / 04h54Z - Doc. VAAC Tokyo

The Klyuchevskoy continues its explosive-effusive activity, with this June 9, 2020 a plume of gas and ash at 5,500-6,000 meters asl, extending over 34 km to the southwest of the volcano.

The aviation code remains orange.

On June 10, small explosions form a "train" of small clouds of gas and ash, accompanied at times by a ring of vapor.

 

Source: KVERT

The Klyuchevskoy plays the train, with a beautiful ring (at the top right of the plume) - 10.06.2020 / 05h43 - photo IVS FEB RAS / KVERT

The Klyuchevskoy plays the train, with a beautiful ring (at the top right of the plume) - 10.06.2020 / 05h43 - photo IVS FEB RAS / KVERT

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
 Sangay - plume of gas and ashes 09.06.2020 / 6:30 am - photo cortesía. Ing. David Rivero. via IGEPN

 Sangay - plume of gas and ashes 09.06.2020 / 6:30 am - photo cortesía. Ing. David Rivero. via IGEPN

The ongoing eruption of Sangay, in Ecuador, left these 8 and 9 June several localities covered with ashes; this situation follows a change of wind direction towards the coast and towards Guayaquil.

Guyayaquil Airport has stopped flights to clean the runways, and authorities are removing ashes from public spaces to prevent respiratory problems they may cause. Roads have been closed in the provinces of Los Rios and Chimborazo. (Reuters Agency)

Sangay - volcanic ash advisory for 09 and 10.06.2020 - Doc VAAC Washington - one click to enlarge Sangay - volcanic ash advisory for 09 and 10.06.2020 - Doc VAAC Washington - one click to enlarge

Sangay - volcanic ash advisory for 09 and 10.06.2020 - Doc VAAC Washington - one click to enlarge

Sangay - ash fall on the west of the volcano on 08.06.2020 - photo IGEPN

Sangay - ash fall on the west of the volcano on 08.06.2020 - photo IGEPN

The IGEPN reports an eruptive episode on the night of June 8, with the lava front collapsing on the southern flank of the Sangay, associated with pyroclastic flows towards the rio Volcán on the south-eastern flank; the ashes are deflected west under strong winds

An emission of ash and gas is reported this June 9 in the morning, at a height of 1,500 meters above the crater in a western direction.

The VAAC Washington reports on several episodes of ash and gas emissions, at a maximum height of 1,770 meters, and a drift to the west and southwest.

 

Sources: IGEPN, VAAC Washington and Reuters agency

 Etna - photo Salvatore lo Giudice 07.06.2020

Etna - photo Salvatore lo Giudice 07.06.2020

During the period from 1 ° to 7 June 2020, the activity of Etna was characterized by eruptive activity in the New Crater of Southeast (NSEC) and the degassing of a variable character from the other summit craters.

A modest intracratric strombolian type activity continued at the NSEC without interruption of time in the saddle cone reported in the previous bulletin. On the surface, this activity produced an intense pulsating degassing, which at night resulted in lightning flashes of variable intensity, discontinuous and weak emissions of ash which quickly dispersed in the atmosphere and occasional expulsion of shreds of lava at - above the edge of the cone crater.

Etna - amplitude of the tremor between 3 and 10.06.2020 - Doc. INGV OE

Seismicity is linked to low fracturing events, to high tremor levels. The infrasonic activity was considerable, decreasing towards the end of the week.

Etna's ground deformation monitoring networks have not shown any significant changes in the past week. Thermal activity in the summit area remained low, as did the flow of sulfur dioxide.

 

Sources: INGV OE - Bollettino Settimanale 01/06/2020 - 07/06/2020 (data emissione 06/09/2020)

Taal - Several months after the Taal eruption, vegetation is noticed in certain parts of Volcano island - photo GMA News / YouScoopers - John Carlo Bagas Avelida
Taal - Several months after the Taal eruption, vegetation is noticed in certain parts of Volcano island - photo GMA News / YouScoopers - John Carlo Bagas Avelida

Taal - Several months after the Taal eruption, vegetation is noticed in certain parts of Volcano island - photo GMA News / YouScoopers - John Carlo Bagas Avelida

In the Philippines, the Taal remains on level 1 / abnormal alert in recent days, with 1 to 5 volcanic earthquakes recorded per day.

During the past 24 hours, weak fumarolic activity, rising to ten meters before drifting to the southwest is observed at the main crater and the vents along the Daang Kastila trail.

 

Several months after the Taal eruption, vegetation is noticed in certain parts of Volcano island ... which remains a zone of permanent danger.

 

Sources: Phivolcs & GMA News / YouScoopers - John Carlo Bagas Avelida

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
 Whakaari / White Island - steam emissions - photo GeoNet 09.06.2020

Whakaari / White Island - steam emissions - photo GeoNet 09.06.2020

GeoNet scientists recorded a short-lived pulse of gas that crossed the Whakaari / White Island volcano from depth. This gas pulse was accompanied by a slight elevation of the ground in the vent area and is probably linked to an intrusion of a new batch of magma at a shallow depth under the volcano. The volcanic alert level remains at level 2 and the aviation color code is yellow.

This short gas pulse reminds us that the volcano is still in a high state of agitation with shallow magma.

Thermal infrared images taken during the observation flight on Wednesday 3 June show that the lava lobes (extrusions observed for the first time in early January) are still very hot, at around 450 ° C. The recent rains have increased emissions steam and water has accumulated on the bottom of the crater.

Occasional slightly high tremor episodes are still observed, although overall tremor levels remain low and in the background levels for the volcano. A rash could occur with little precursor activity. The plausible triggers for an eruption remain the collapse of unstable materials around the vents, the sudden release of gas from the magma and the rapid entry of water onto the shallow magma body.

If an explosive activity produces an ash cloud, the likelihood of ash affecting the continent remains very low. Under appropriate weather conditions, the plume of gas and vapor can be seen on the continent in the form of weak acid rain.

The volcanic alert level remains at level 2. The aviation color code remains yellow.

 

Source: GeoNet 09.06.2020

Pacaya - 2020.06.08 lava flow - Sentinel-2 bands 12,11,5 - Doc. Insivumeh

Pacaya - 2020.06.08 lava flow - Sentinel-2 bands 12,11,5 - Doc. Insivumeh

At Pacaya, the Mackenney crater is observed, with a white fumarole, shriveled to the south and southwest.

During the night and early morning of June 8, 2020, Strombolian explosions with ejections of volcanic materials 50, 75 and 100 meters high were observed. The lava flow in a northeast direction with a length of about 700 meters. (unlike the length announced with the Sentinel-2 image - information both announced by Insivumeh)

The PCG and PCG5 seismic stations record tremors associated with the rise of magma and gases.


Source: Insivumeh

 Fuego - block avalanches 08.06.2020 - Sentinel-2 bands 12,11,5 - Doc. Insivumeh
 Fuego - block avalanches 08.06.2020 - Sentinel-2 bands 12,11,5 - Doc. Insivumeh

Fuego - block avalanches 08.06.2020 - Sentinel-2 bands 12,11,5 - Doc. Insivumeh

The observatory of the Fuego volcano reports a weak white fumarole with a height of 4,100 meters, weak and moderate explosions, between 7 to 10 per hour, accompanied by columns of gray ash, at a height of 4,300 to 4,600 meters, dispersed in a north and northeast direction.

Weak incandescent pulses are observed at the crater, as are weak and moderate block avalanches, towards the Trinidad, Taniluyá, Ceniza, Las Lajas, Honda and Seca barrancas.

The explosions generated low rumblings with shock waves, vibrant roofs and windows in the homes of villages near the volcano. Sounds similar to locomotives are heard for periods of 1 to 3 minutes.


Source: Insivumeh

Sabancaya - summary of the activity between 1 ° and 7 June 2020 - Doc. I.G.Peru

Sabancaya - summary of the activity between 1 ° and 7 June 2020 - Doc. I.G.Peru

The Peruvian Geophysical Institute (IGP) reports that the eruptive activity of the Sabancaya volcano remains at moderate levels; that is to say with the continuous recording of explosions, at the rate of 18 explosions daily on average, with ash plumes up to 1.5 km high above the summit of the volcano and the emission consequent of ash and gas.

During this period, the IGP recorded and analyzed the occurrence of approximately 598 earthquakes of volcanic origin, associated with the circulation of fluids (magma, gas, etc.) within the volcano.

Between June 2 and 5, earthquakes of magnitudes M2.9 to M3.6 occurred, located between 12 km to 15 km southwest and northeast of the volcano, near the populated centers of Huambo, Maca and Pinchollo, which would be associated with the tectonic and volcanic activity of the area.

The monitoring of the deformation of the volcanic structure, using GNSS data (processed with fast orbits), does not present any significant anomalies; however, slight inflation in the northern sector of Sabancaya has been recorded since May 23, probably linked to the eruptive activity of the volcano.

Satellite surveillance identified the presence of 3 thermal anomalies with values ​​included with values ​​between 1 MW-13 MW, associated with the presence of a body of lava on the surface of the volcano crater.

The volcanic alert remains in Naranja, along with a 12 km prohibited area around the crater.

 

Source: I.G. Peru

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
 Nevados de Chillan - 06.06.2020 / 04h17 loc. - Doc. OVDAS

Nevados de Chillan - 06.06.2020 / 04h17 loc. - Doc. OVDAS

The Sernageomin OVDAS reports an LP earthquake, associated with the dynamics of internal fluids at the Nevados de Chillan complex this June 6, at 4:17 am local; the hypocentre is located 6 km deep.

The corresponding explosive activity on the surface is characterized by a plume of ash, incandescent materials and gases rising 760 meters above the point of emission, with a dispersion towards the northeast, and projections on the upper flanks of the volcano.

The Amarilla alert level is maintained.

 

Source: Sernageomin

Semeru - Sentinel-2 L1C image on 2020-05-05 bands 12,4,2 dated 04.06.2020 - one click to enlarge

Semeru - Sentinel-2 L1C image on 2020-05-05 bands 12,4,2 dated 04.06.2020 - one click to enlarge

The activity of Semeru, on the island of Java, continues.

The PVMBG reports for this June 6, 20:

- 62 eruption earthquakes, with an amplitude of 10-22 mm, and the duration of the earthquake 55-150 seconds.

- 22 blast earthquakes, with an amplitude of 2 to 8 mm and an earthquake duration of 37 to 75 seconds.

- 1 volcanic earthquake with an amplitude of 20 mm, S-P 0.5 seconds and an earthquake duration of 8 seconds.

- 2 distant tectonic earthquakes, with an amplitude of 10-12 mm, S-P 14-15 seconds and an earthquake duration of 35-45 seconds.

A glowing flow is still visible on the Sentinel-2 images

 

Sources: PVMBG, Magma Indonesia and Sentinel-2

Semeru - seismicity increasing since the 1st week of April / Magma indonesia - and thermal anomalies on 07.06.2020 / 03h20 / Doc.Mirova - one click to enlarge
Semeru - seismicity increasing since the 1st week of April / Magma indonesia - and thermal anomalies on 07.06.2020 / 03h20 / Doc.Mirova - one click to enlarge

Semeru - seismicity increasing since the 1st week of April / Magma indonesia - and thermal anomalies on 07.06.2020 / 03h20 / Doc.Mirova - one click to enlarge

IBU - 06.06.2020 / 10.50 am - photo webcam Magma Indonesia / PVMBG

IBU - 06.06.2020 / 10.50 am - photo webcam Magma Indonesia / PVMBG

In the Moluccas, we observe a plume of ash and gas, white-gray, 200-800 meters above the summit of the Gunung Ibu this June 6.

Seismicity is available in:

- 67 eruption earthquakes, with an amplitude of 15-30 mm, and the duration of the earthquake 21-80 seconds.

- 69 collapse earthquakes with an amplitude of 2-8 mm and an earthquake duration of 13 to 60 seconds. The sliding distance and the direction of fall are not observed.

- 242 blast earthquakes, with an amplitude of 5 to 14 mm and an earthquake duration of 10 to 105 seconds.

 

Sources: PVMBG, Magma Indonesia

Kagoshima Bay with Sakurajima on 06/05/2020 - Image Sentinel-2 bands 12,11,4 - one click to enlarge

Kagoshima Bay with Sakurajima on 06/05/2020 - Image Sentinel-2 bands 12,11,4 - one click to enlarge

In Japan, Sakurajima is still as active on June 6 and 7.

The JMA for this day raises an ash plume at 1,000 meters above the Minamidake crater.

Emissions are dispersed west and southwest, while remaining close to the place of origin.

 

Source: JMA and VAAC Tokyo

June 6, 2020, ~ Explosion ~ 桜島 Sakurajima Volcano, Japan ~ 23:24 JST

Sakurajima - Volcanic Ash Advisory 07.06.2020 - Doc. VAAC Tokyo

Sakurajima - Volcanic Ash Advisory 07.06.2020 - Doc. VAAC Tokyo

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Publié le par Bernard Duyck
Publié dans : #volcanic activity

Monthly summary of the activity of the Kīlauea volcano, which is not erupting. Monitoring data for May shows variable but typical rates of seismicity and soil deformation, low rates of sulfur dioxide emissions and only minor geological changes since eruptive activity ended in September 2018 .

Seismicity rates during the month were about 25% lower than last month.

Sulfur dioxide emission rates are low at the top and below the detection limits at PuʻuʻŌʻō and in the lower East Rift Zone.

The crater lake at the bottom of Halema'uma'u continues to expand and deepen slowly. As of June 3, the depth of the lake was approximately 36 meters. A certain amount of sulfur dioxide is dissolved in the summit lake and work is continuing to try to quantify this process.

Kilauea - Halema'uma'u crater on 05.29.2020 - The lake has an area of ​​around 25,000 square meters, which is more than double the area measured at the end of December - photo HVO

Kilauea - Halema'uma'u crater on 05.29.2020 - The lake has an area of ​​around 25,000 square meters, which is more than double the area measured at the end of December - photo HVO

Kilauea - Halema'uma'u crater on 29.05.2020 - The lake is warmer than the rocks which surround it and have fumaroles - Doc. HVO - One click to enlarge

Kilauea - Halema'uma'u crater on 29.05.2020 - The lake is warmer than the rocks which surround it and have fumaroles - Doc. HVO - One click to enlarge

Over the past month, summit inclinometers have shown a slight increase in inflationary tilt, consistent with an increase in the rate of magma entering the volcano's shallow storage system.

The gas measurements show continuous low levels of sulfur dioxide emissions from the Halema'uma'u region, which probably means that magma is not present a few hundred meters from the surface.

Further east, on the east rift zone of Kīlauea, GPS stations and inclinometers continue to show movements compatible with the filling of the magmatic reservoir of the east rift zone in the vast region between Puʻu ʻŌʻō and route 130 .

Although not currently erupting, areas of high and persistent ground temperatures and minor gas releases are still in the vicinity of the cracks in the lower rift zone east of 2018. These include vapor from water, very small amounts of hydrogen sulfide and carbon dioxide. These conditions should be present in the long term. Similar conditions after the 1955 eruption continued for years, if not decades.

Kilauea - This series of maps compares aerial images collected before the collapse of the Kīlauea summit in 2018 with aerial images collected after the collapse of the summit in 2018 - Doc. HVO - One click to enlarge

Kilauea - This series of maps compares aerial images collected before the collapse of the Kīlauea summit in 2018 with aerial images collected after the collapse of the summit in 2018 - Doc. HVO - One click to enlarge

For the record, an episode that is reminiscent of that of 2018 ...

The last global pandemic raged 100 years ago when Kilauea erupted. This eruption produced the Mauna Iki ("small mountain") lava shield in the southwest rift zone of Kīlauea, and coincided with fluctuations in the Halema'uma'u lava lake. It ended in early August 1920.

By the end of November 1919, the long-lived lava lake Halema'uma'u was at a high level and, in fact, frequently spilled over the main soil of the caldera. Suddenly, on November 28, it emptied completely without earthquakes, leaving an empty pit almost 200 meters deep.

 

Source: HVO

Asosan - photo RKK 05.06.2020 / 09h55

Asosan - photo RKK 05.06.2020 / 09h55

The eruption that occurred at Mount Aso on May 22 continues.

This June 5, an ash plume is observed between 500 and 900 meters (after 3 p.m.) above the Nakadake crater.

The activity is underway this June 6.

 

Sources: JMA & VAAC Tokyo

Manam - blue gas emission on 03.06.2020 / Sentinel-2 bands 12,11,4 - and thermal anomalies of the last days / Doc Mirova on 06.06.2020
Manam - blue gas emission on 03.06.2020 / Sentinel-2 bands 12,11,4 - and thermal anomalies of the last days / Doc Mirova on 06.06.2020

Manam - blue gas emission on 03.06.2020 / Sentinel-2 bands 12,11,4 - and thermal anomalies of the last days / Doc Mirova on 06.06.2020

The eruption started in Manam, Papua New Guinea, on June 29, 2014 continues with spaced episodes.

In June, the Sentinel-2 images reveal a covered summit, from which emitted bluish gas (sulfur dioxide) emissions on June 3, and Mirova reports thermal anomalies, moderate - 23 MW on June 4 - to low - 5 MW on June 6.

 

Sources: Sentinel-2 and Mirova

Popocatépetl - explosion of 04.06.2020 / 23h01 - WebcamsdeMexico

Popocatépetl - explosion of 04.06.2020 / 23h01 - WebcamsdeMexico

In the past 24 hours, the Popocatépetl volcano monitoring system has identified 344 exhalations accompanied by water vapor, volcanic gases and small amounts of ash. The ash emissions were scattered in the south, southwest sector.

Two moderate explosions were also detected yesterday at 11:00 p.m. and 11:02 p.m. local time.

In addition, 453 minutes of tremors were recorded.

During the night, continuous emissions of water vapor, gas and small amounts of ash were observed.

During the morning of June 5, there were volcanic gas emissions and small amounts of ash scattered to the southwest.

The volcanic alert remains at Amarillo Fase 2.

 

Source: Cenapred

 Popocatépetl - exhalation on 04.06.2020 / 12h29 - WebcamsdeMexico

Popocatépetl - exhalation on 04.06.2020 / 12h29 - WebcamsdeMexico

Popocatépetl - summary of activity over the past 24 hours - Doc. Cenapred

Popocatépetl - summary of activity over the past 24 hours - Doc. Cenapred

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