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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
 Etna SEC - 06.14.2021 / 9.45pm - strombolian activity and eruptive plume - EMOV / INGV webcam

Etna SEC - 06.14.2021 / 9.45pm - strombolian activity and eruptive plume - EMOV / INGV webcam

Since approximately 9:10 p.m. on June 14, a new increase in Strombolian activity at the Southeast Crater of Etna has been observed. According to the forecast model, the eruptive cloud produced by this activity disperses in the SE direction. In addition, an overflow of lava is observed from the south side of the southeastern Crater which spreads to the southwest.

At the same time as the increase in Strombolian activity, we observe a further increase in the average magnitude of the volcanic quake at the high level, located in the Southeast Crater region at about 2900 m. above sea level.

The INGV announces at 21:46 UTC that the Strombolian activity has passed to the lava fountain. The fountain ceased to be active at 10:44 UTC / 12:44 local time on June 15.

 

Source: INGVvulcani

Etna SEC - 06.14.2021 / 9:39 p.m. - webcam therm. INGV and variations of the tremor at 06.15.2021 / 1 p.m. - Doc. INGV - One click to enlarge
Etna SEC - 06.14.2021 / 9:39 p.m. - webcam therm. INGV and variations of the tremor at 06.15.2021 / 1 p.m. - Doc. INGV - One click to enlarge

Etna SEC - 06.14.2021 / 9:39 p.m. - webcam therm. INGV and variations of the tremor at 06.15.2021 / 1 p.m. - Doc. INGV - One click to enlarge

Etna - evolution of the Southeast crater from June 2007 to June 2021 - photos Boris Behncke, taken from the same point: north edge of Mount Barbagallo.

Etna - evolution of the Southeast crater from June 2007 to June 2021 - photos Boris Behncke, taken from the same point: north edge of Mount Barbagallo.

The week of June 7 to 13 was marked by moderate activity in Sabancaya, with an average of 79 daily explosions, accompanied by ash plumes up to 2,000 meters above the summit.

During the period, I.G. Peru detected 1070 earthquakes of volcanic origin associated with the circulation of internal magmatic fluids. VT earthquakes, from M 2.0 to 3.5, occurred over an eastern sector.

The institute does not report any significant deformation anomalies; it signals 11 thermal anomalies, with a max. of 22 MW, associated with the presence of a lava body on the surface in the crater.

 

Source: I.G. Peru

Sabancaya - activity from 07.06 to 13.06.2021 - Doc. I.G. Peru

Sabancaya - activity from 07.06 to 13.06.2021 - Doc. I.G. Peru

Sabancaya - 06.13.2021 - thermal anomaly and plume - image Sentinel-2 bands 12.11.8A - via Mounts project

Sabancaya - 06.13.2021 - thermal anomaly and plume - image Sentinel-2 bands 12.11.8A - via Mounts project

The Kīlauea volcano is no longer erupting. No surface activity has been observed by field crews or webcam images over the past week.

The most recent sulfur dioxide (SO2) emission rates, measured on June 11, 2021, were 70 tonnes per day (t / d). SO2 emission rates approach the levels associated with the non-eruptive period from late 2018 to late 2020 (30-35 t / d) and are significantly lower than the emission rates which were on average over 800 t / d from mid-February to mid-April.
Summit tiltmeters have registered a deflation-inflation cycle over the past week, with slight inflation over the past two days. Seismicity remains broadly stable, with earthquake counts over the past week similar to previous weeks.
It is possible that the Halema'uma'u vent will resume its eruption or that the Kīlauea will enter a period of calm before the next eruption.

Kilauea - Halema‘uma‘u crater - solidified crust covers the lava lake - 06.11.2021 / 12:20 HST - photo HVO / JM. Chang

Kilauea - Halema‘uma‘u crater - solidified crust covers the lava lake - 06.11.2021 / 12:20 HST - photo HVO / JM. Chang

Kilauea - Halema‘uma‘u crater - higher temperature spots - 11.06.2021 / 20:42 HST - photo webcam therm. HVO

Kilauea - Halema‘uma‘u crater - higher temperature spots - 11.06.2021 / 20:42 HST - photo webcam therm. HVO

The surface of the lake is completely covered with a solidified lava crust. No surface activity or evidence of recent surface activity has been observed over the past week. Small, higher temperature spots around the rim and in local cavities remain visible on the webcam thermal imaging, albeit at temperatures well below those associated with molten lava.


Current volcanic alert level: Advisory
Current Aviation Color Code: Yellow

 

Source: HVO-USGS

Fagradalsfjall, Nátthaga valley - steep lava advance between 06.15.2021 at 07:21 am and 10:29 am - the landmark is the vegetation triangle on the left - webcam mbls
Fagradalsfjall, Nátthaga valley - steep lava advance between 06.15.2021 at 07:21 am and 10:29 am - the landmark is the vegetation triangle on the left - webcam mbls

Fagradalsfjall, Nátthaga valley - steep lava advance between 06.15.2021 at 07:21 am and 10:29 am - the landmark is the vegetation triangle on the left - webcam mbls

Fagradalsfjall Eruption: Lava is now entering the Nátthaga Valley from four different points, the fourth of which started on Sunday and is still flowing now.

The flow extended into the Nátthagi valley and currently circulates mainly in tunnels (15/6 - Pierre Gondolff)


According to the latest data from the Institute of Earth Sciences at the University of Iceland, the lava flow has been stable at 12 cubic meters per second for about six weeks, for a running total of about 60 million meters. cubes so far.

Sources: RUV, mbls and P. Gondolff

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
Fagradalsfjall - Hraunáin waterfalls m.a. crossing the hiking trail towards the Nátthaga Valley. - Image VF 06/14/2021

Fagradalsfjall - Hraunáin waterfalls m.a. crossing the hiking trail towards the Nátthaga Valley. - Image VF 06/14/2021

A mighty river of lava now flows into Nátthagi from Geldingadalur / Fagradalsfjall eruption.

A large amount of fluid lava now rushes down the steep slope and collects in a pond at the bottom of the valley below. A large amount of lava flowed into Nátthaga today.

Fagradalsfjall eruption - flow in the Nátthaga valley - photo © Thierry Sluys 06/14/2021 - one click to enlarge the thubnails

Fagradalsfjall eruption - flow in the Nátthaga valley - photo © Thierry Sluys 06/14/2021 - one click to enlarge the thubnails

Fagradalsfjall eruption - supply of the flow in the Nátthaga valley by lava tunnels - photod © Thierry Sluys 06.14.2021
Fagradalsfjall eruption - supply of the flow in the Nátthaga valley by lava tunnels - photod © Thierry Sluys 06.14.2021

Fagradalsfjall eruption - supply of the flow in the Nátthaga valley by lava tunnels - photod © Thierry Sluys 06.14.2021

Fagradalsfjall eruption - flow front in the Nátthaga valley - photo © Thierry Sluys 14.06.2021

Fagradalsfjall eruption - flow front in the Nátthaga valley - photo © Thierry Sluys 14.06.2021

Our friend Thierry Sluys shared photos of his day of June 14, during which he climbed from the flow front in the Nátthaga valley towards the belvedere which allows to see the emission cone.

He encountered a bulldozer erecting a dike which should guide the lava towards the sea, prevent it from heading towards Nátthagakrik, and not threaten Grindavík and Svartsengi.

An excavator draws another path to facilitate new access for hikers to the upper part of the lava fields.

 

Sources: VF and Thierry Sluys (thank you for his photos and comments)

Fagradalsfjall eruption - the active cone which closes - photo © Thierry Sluys 06/14/2021

Fagradalsfjall eruption - the active cone which closes - photo © Thierry Sluys 06/14/2021

Fagradalsfjall eruption - works to channel the lava in the Nátthaga valley - photo © Thierry Sluys 14.06.2021

Fagradalsfjall eruption - works to channel the lava in the Nátthaga valley - photo © Thierry Sluys 14.06.2021

A visit to the Nyiragongo crater was carried out this Friday, June 11 by experts, departing from the OVG, accompanied by armed rangers from the Virungas Park.

Their mission: " to use drones and camera systems to assess landslides and see if the crater is collapsing", explains Christopher Horsley, technical assistant at the OVG. {...} " The arrival at the top offers a bird's eye view of the crater, in the process of collapsing on itself, in a low rumble, punctuated by explosions. At nightfall, glowing lava residue is visible at the bottom of the crater ".

Nyiragongo summit - view of the glowing crater during the night of 06.12.2021 - Photo by Arsène T. SADIKI via Ch.Balagizi

Nyiragongo summit - view of the glowing crater during the night of 06.12.2021 - Photo by Arsène T. SADIKI via Ch.Balagizi

North Kivu is a volcanologically active area, with two giants: the Nyiragnogo, a stratovolcano housing a lava lake, and the Nyamuragira, a shield volcano.

A red glow also appears in the distance to the north: the second volcano, Nyamuragira, is active. A new lava lake appears to be stable in its caldera.

Many other volcanoes are present in the Parc des Virungas.

 

Source: RTBF / extract from AFP news

Nyamuragira - hot spot in the caldera - image Sentinel-2 bands 12,11,4 from 06.11.2021 - one click to enlarge

Nyamuragira - hot spot in the caldera - image Sentinel-2 bands 12,11,4 from 06.11.2021 - one click to enlarge

Nyamuragira - Thermal anomalies at 06.13.2021 / 11am - Doc. Mirova MODIS_Latest10NTI

Nyamuragira - Thermal anomalies at 06.13.2021 / 11am - Doc. Mirova MODIS_Latest10NTI

This image taken by the HMG Guardian on June 12 shows the new look of La Soufrière crater, SVG.

Professor Robertson captioned the photo so we can see the 1979 crater rim, the 2021 new explosion crater rim, and the lake. There are several hydrothermal vents and these are responsible for the vapor that can be seen on most days.

The alert is still in Orange and access to the volcano is still prohibited for the moment.

 

Source: UWI-SRC

Soufriere de St. Vincent - the crater 2021 - photo HMG Guardian & Prof. Robertson / UWI / 06.12.2021

Soufriere de St. Vincent - the crater 2021 - photo HMG Guardian & Prof. Robertson / UWI / 06.12.2021

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Publié le par Bernard Duyck
Publié dans : #volcanic activity

Suðurnes police decided on June 13, 2021 to block traffic in the Fagradalsfjall eruption area for safety reasons.

The decision was taken in consultation with the Civil Protection Department of the National Police Commissioner after lava began to flow from south of Geldingadalur, on hiking trail A and up to Nátthaga. The Coast Guards flew over the area which was closed on Sunday and checked to see if anyone had been trapped. According to information from the guards, no one was seen in the area.

Fagradalsfjall - Lava cuts trail A and flows into Natthaga - 06.13.2021 - photo Veðurstofa Íslands

Fagradalsfjall - Lava cuts trail A and flows into Natthaga - 06.13.2021 - photo Veðurstofa Íslands

Fagradalsfjall - Lava cuts trail A and flows into Natthaga - 06.13.2021 - photo Safetravel

Fagradalsfjall - Lava cuts trail A and flows into Natthaga - 06.13.2021 - photo Safetravel

Fagradalsfjall - Lava cuts trail A and flows into Natthaga - 06/13.2021 10:14 am - RUV webcam via Kristin Jonsdottir

Fagradalsfjall - Lava cuts trail A and flows into Natthaga - 06/13.2021 10:14 am - RUV webcam via Kristin Jonsdottir

Preparations have started for the construction of a new hiking trail at a location similar to hiking trail B, i.e. on the west side of Fagradalsfjall.

The eruption sites are open today, but people will be directed to route B which is actually more for experienced hikers (harder and longer). Hiking trail A is not considered safe.

There is also an easy walking route to Nátthaga, where lava flows from Geldingadalur and south of Meradalur.

Geldingadalir Volcano, Iceland - LIVE! Nátthagi camera mbls

New measurements were taken on Friday, June 11, when Garðaflug flew with the Hasselblad camera from the Institute of Natural History, and new land models of Fagradalshraun have now been prepared based on the images.

The average lava flow over the period from 02 to 11 June (9 days) is nearly 12 m³ / s, which is unchanged from the previous period (18 May - 02 June). The lava flow has therefore remained almost constant for the past six weeks and has been twice as high as the average for the first six weeks.

The lava now measures 63 million cubic meters and the area is 3.23 square kilometers. The area has increased considerably since the last measurement, to more than 60,000 square meters per day. This corresponds to around 9 football pitches every day.

 

Sources: University of Iceland - http://jardvis.hi.is/eldgos_i_fagradalsfjalli (posted on 14.06.2021) & police of Suðurnes, RUV and mbls.

Fagradalsfjall eruption - parameters (area, volume and discharge of lava, geochemistry, analysis and quantities of gas emitted) - Doc. jardvis.hi.is/eldgos_i_fagradalsfjalli

Fagradalsfjall eruption - parameters (area, volume and discharge of lava, geochemistry, analysis and quantities of gas emitted) - Doc. jardvis.hi.is/eldgos_i_fagradalsfjalli

The Bulusan volcano monitoring network, in the Philippines, recorded one hundred and five (105) volcanic earthquakes on 12.06.2021 in the last 24 hours of observation. Weak emission of white vapor-laden plumes from the lower southeast vents before drifting north-northwest was observed. Soil deformation data from real-time electronic deformation monitoring recorded sustained inflation of the upper slopes that began on March 6, 2021, which corresponds to short-term inflation of the building as measured by GPS monitoring continuous since February 2021. These parameters generally indicate that shallow hydrothermal processes are occurring under the edifice.

The monitoring network recorded on 13.06 twenty-seven (27) volcanic earthquakes during the last 24 hours of observation.

The increase in seismic activity is probably due to shallow hydrothermal activity following the recharge of rainwater in the Bulusan hydrothermal system.

Bulusan Volcano has Level 1 alert status, which means it is currently in an abnormal state. Local authorities and the public are reminded that entry into the permanent danger zone (PDZ) with a radius of 4 kilometers must be strictly prohibited and that vigilance in the extended danger zone (EDZ) of 2 kilometers in the sector southeast must be exercised due to the increased possibilities of sudden and dangerous phreatic eruptions
 

Source: Phivolcs

Bulusan - surface thermal events - overview PHIVOLCS-SPDRRMO / archives 10.2016

Bulusan - surface thermal events - overview PHIVOLCS-SPDRRMO / archives 10.2016

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Publié le par Bernard Duyck
Publié dans : #volcanic activity

From approximately 11:30 UTC on June 12, 2021, an increase in the intensity and frequency of Strombolian activity is observed at the level of the southeast crater of Etna, which produces a discontinuous ash emission which is scattered in the summit area.
From approximately 11:30 UTC, the average amplitude of the volcanic tremor showed a clear increase and around 12:15 UTC, it reached the high range; At present, the parameter still shows a clear increasing trend. The centroid of volcanic tremor sources is located in the area of ​​the southeastern crater at an altitude of 2900-3000 m above sea level. At the same time, infrasonic activity has also intensified and shows a clear trend of increase, both in terms of the rate of occurrence and in the energy of infrasonic events, which are located in the south-eastern crater.

Etna SEC - 06.12.2021 - photo Rosanna Corsaro via INGV

Etna SEC - 06.12.2021 - photo Rosanna Corsaro via INGV

A further increase in Strombolian activity at the southeast crater is observed from around 12:50 UTC. According to the forecast model, the eruptive cloud produced by this activity disperses in the SW direction.

In addition, an overflow of lava is observed from the southern flank of the southeast crater which extends in a southwest direction. The mean amplitude of the volcanic tremor continues to show an increasing trend, in the range of high values. The center of gravity of the source of the volcanic tremor is located in the south-eastern crater area at an altitude of 2900-3000 m above sea level.

Etna SEC - 06.12.2021 / 1:03 p.m. - EMOT / INGV webcam

Etna SEC - 06.12.2021 / 1:03 p.m. - EMOT / INGV webcam

From around 7:30 p.m. the Strombolian activity of the southeast crater passed to a lava fountain. Based on the forecast model, the eruptive cloud produced by the current activity disperses to the south. As for the lava overflow, it is well fed and its front has reached an altitude of about 2800 m above sea level. In addition, an additional flow is observed which extends in an easterly direction and which around 19:00 UTC reached the upper western edge of the Bove valley.

From around 21:15 UTC, the mean amplitude of the volcanic tremor showed a rapid decrease and reached the base of the high value range around 22:50 UTC. Currently, this parameter shows a new downward trend.

At 11:16 pm we observe that the lava fountain of the southeast crater has ceased; instead, Strombolian activity continues.
The eruptive cloud produced during the fountain dispersed towards the SSE and news of a fallout of volcanic material was received at the Sapienza refuge. Lava overflows are reported.

The decrease in the average amplitude of the volcanic tremor, reported in the same press release, also continued in the following hours and around 00:30 the parameter reached the range of low values. Currently, the amplitude of the tremor shows a stationary trend within this level. The center of gravity of the springs
of the volcanic tremor is located in the area between the Bocca Nuova crater and the southeast crater, at an altitude of 2900-3000 m above sea level.

 

Source: INGV OE

Etna SEC - Lava fountain and flow on 12.06.2021 / 20:04 - EMOT / INGV webcam

Etna SEC - Lava fountain and flow on 12.06.2021 / 20:04 - EMOT / INGV webcam

Etna SEC - 12.06.2021, the main phase started at sunset - photo Boris Behncke

Etna SEC - 12.06.2021, the main phase started at sunset - photo Boris Behncke

Etna - trémor on 13.06.2021 / 06h - INGV OE document

Etna - trémor on 13.06.2021 / 06h - INGV OE document

During the past 24 hours, the Taal volcano network has not detected any volcanic earthquakes, however, a low-level earthquake has persisted since April 8, 2021. The activity of the main crater has been dominated by the ascent of hot volcanic fluids in its lake which generated plumes of 1,500 meters high which drifted towards the northwest. Sulfur dioxide (SO2) emissions were on average 9,911 tonnes / day as of June 10, 2021.

The activity of the main crater, dominated by the rise of hot volcanic fluids in its lake, generated plumes 1,000 meters high that drifted southwest and northwest. Sulfur dioxide (SO2) emissions were on average 4,673 tonnes / day on June 11, 2021.

Taal - photo sat. de la caldera and Volcano Island - Imagery courtesy of Planet Inc. / via GVP

Taal - photo sat. de la caldera and Volcano Island - Imagery courtesy of Planet Inc. / via GVP

" The unprecedented level of sulfur dioxide flux during this period of seismic quiescence warns the public not only of continuing magmatic unrest, but also of the direct impact of volcanic gas on downwind populations and economies. localities around Taal Lake ” the Phivolcs said in an advisory.

 

Alert level 2 (increased unrest) is currently maintained on the Taal volcano. DOST-PHIVOLCS reminds the public that at Alert Level 2, sudden steam or phreatic explosions, volcanic earthquakes, minor ash falls and fatal accumulations or expulsions of volcanic gas can occur and threaten areas in and around TVI. DOST-PHIVOLCS strongly recommends that entry be strictly prohibited into the volcanic island of Taal, the permanent danger zone or PDZ of Taal, especially the surroundings of the main crater and the Daang Kastila fissure, as well as the occupation and boating on Taal Lake.

 

Sources: Phivolcs and Philippine Star

Nyiragongo - Sentinel-2 bands 12,11,4 of 11.06.2021 (after the eruption)

Nyiragongo - Sentinel-2 bands 12,11,4 of 11.06.2021 (after the eruption)

The authorities of the Democratic Republic of Congo (DRC) have decided to degas the Kabuno golf course on the northwest coast of Lake Kivu after the eruption, last May, of the Nyiragongo volcano, whose contact with carbon dioxide massed in the gulf could kill millions of people in the region.

"The government is in the process of harnessing itself so that the disbursement is done quickly so that the delivery of the material which will allow this degassing to be done as quickly as possible", declared to the Anadolu Agency, Didier Budimbu , Congolese Minister of Hydrocarbons.

He commissioned the French entrepreneur and expert Michel Halbwachs to degas the Kabuno golf course.

“The carbon dioxide in this gulf is less than 20 meters from the surface. It would suffice for there to be a flame, an explosion that will release this gas and if the wind is not favorable and it heads towards Goma, this gas will decimate the population by asphyxiation even in full sleep ”, a he said.

The cost of the work to extract carbon dioxide from this gulf is $ 5.5 million, he estimated.

 

Source: Anadolu Agency

Eruption - June 10, 2021- Traveler In The Whole World

Fagradalsfjall eruption :

The lava flow from the Geldingadalur eruption now appears to be heading largely to the eastern part of Meradalur, where the lava field has started to thicken considerably. So the thickness of the lava is 10-12 meters in the valley, but 2-3 meters at the edges.

The thickening of the lava flow occurs in both Geldingadalur and Meradalir. There is less flow to Nátthaga.

 

Source: Þorvaldur Þórðarson,  Professor of Volcanology at the University of Iceland / via mbls.

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
Stromboli - 06.11.2021 / 4:06 p.m. - webcam therm. INGV OE

Stromboli - 06.11.2021 / 4:06 p.m. - webcam therm. INGV OE

The National Institute of Geophysics and Volcanology, Etneo Observatory, announces that as of approximately 2:00 p.m. UTC, CCTV camera images from Stromboli show an increase in projection activity and explosions from active vents in the area. from the North crater. The coarse material produced covers the sides of the cone abundantly and rolls along the Sciara del Fuoco.

From 14:40 UTC, an overflow of lava is also observed from the edge of the north crater area. The lava flow produced is in the upper sector of the Sciara del Fuoco.
The trend of the average amplitude of the volcanic tremor does not show significant variations and the values ​​are maintained at the average level. The frequency and amplitude of transients attributable to explosive events do not show significant variations.
The networks of tilt and GNSS stations for monitoring soil deformation on the island do not show any significant changes.

 

Source: INGV OE

Stromboli - 06.12.2021 / 06:03 - webcam therm. INGV OE

Stromboli - 06.12.2021 / 06:03 - webcam therm. INGV OE

In Merapi, on the island of Java, the activity level has remained at level III (siaga) since November 5, 2020 at 12:00 WIB.

Thanks to the seismographic recordings of June 11, 2021, it was recorded:
- 4 earthquakes linked to pyroclastic avalanche flows
- 124 times the avalanche earthquake
- 12 times the blast / emission earthquake
- 21 hybrid / multiphase earthquakes
- 2 times the shallow volcanic earthquake
- 1 distant tectonic earthquake.

 

On June 12, 2021 at 8:30 a.m. WIB was recorded on a seismogram with an amplitude of 67 mm and a duration of 155 seconds. No visuals due to fog, glide distance estimated at 2,000 m to the southwest.

 

Sources: PVMBG, Magma Indonesia and BPPTKG

Merapi - Pyroclastic flow of collapse on 06.11.2021 / 08:14 - Babadan-2 webcam

Merapi - Pyroclastic flow of collapse on 06.11.2021 / 08:14 - Babadan-2 webcam

Merapi - seismicity for the week on 06.11.2021 (above) & seismograms for 06.12.2021 (below) - Doc. BPPTKG
Merapi - seismicity for the week on 06.11.2021 (above) & seismograms for 06.12.2021 (below) - Doc. BPPTKG

Merapi - seismicity for the week on 06.11.2021 (above) & seismograms for 06.12.2021 (below) - Doc. BPPTKG

The surface of the lake in the Halama'uma'u Crater of Kilauea is now completely covered with a solidified lava crust. No surface activity or evidence of recent surface activity has been observed over the past week except for minor subsidence in the range of 1 to 2 meters (3 to 7 feet).

Small, higher-temperature spots around the rim and in local cavities remain visible on the webcam thermal imaging, albeit at temperatures well below those associated with molten lava.

 

Source: HVO-USGS

Kilauea - Halema'uma'u lava lake - HVO therm webcam 06.11.2021 / 8:42 p.m. HST

Kilauea - Halema'uma'u lava lake - HVO therm webcam 06.11.2021 / 8:42 p.m. HST

The Volcanological Observatory of Piton de la Fournaise, the Reunion National Park and the Cité du Volcan, are pleased to announce the baptismal name of the new volcanic cone, resulting from the eruption from April 9 to May 24, 2021: the "Piton Guy Valcourt PICARD".

Guy Valcourt PICARD was a former guide and carrier of the Volcano. He left us at the age of 85, shortly before the onset of this eruption. He was the son of Alfred PICARD, emblematic guide of the Volcano who marked his time in the 50s / 60s and who forged the spirit of the last former guides and carriers of the Volcano.

He was introduced to geology by the scholars Marcel Ducrot, Maurice Jean, Haroun Tazieff, Maurice and Katia Krafft, whom he accompanied to the Piton de la Fournaise.

 

Source: P.Huet / City of the volcano

Le piton Guy Valcourt PICARD - City of the volcano / photo P.Huet

Le piton Guy Valcourt PICARD - City of the volcano / photo P.Huet

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Publié dans : #volcanic activity
 Fagradalsfjall, active eruptive vent - 06.09.2021 / 11:14 pm - waterfalls and rivers of lava - webcam mbls

Fagradalsfjall, active eruptive vent - 06.09.2021 / 11:14 pm - waterfalls and rivers of lava - webcam mbls

Fagradalsfjall, active eruptive vent - 06.10.2021 / 03:40 - waterfalls and rivers of lava - webcam mbls

Fagradalsfjall, active eruptive vent - 06.10.2021 / 03:40 - waterfalls and rivers of lava - webcam mbls

According to Kristín Jónsdóttir, head of natural hazards monitoring at the Icelandic Met Office, changes took place on Thursday, June 10 at around 4 p.m. at the site of the Fagradalsfjall volcanic eruption.

The activity is no longer characterized by fountains at the crater, but rather cascades.

The pulsatile activity of the fountains, which has become the norm since May 2, has changed: the fountains have become smaller and more regular, to pass to a constant emission activity.

 Overall lava production remains stable, however.

 

According to Icelandic experts, the observations of the evolutionary stage towards a shield volcano will be evaluated with the modern tools available today ... a first !

Lava thickness maps were born, and show that in some places the lava reached more than 100 meters thick ... a tower of more than 30 floors.

 

Sources: analyzes by Kristín Jónsdóttir / RUV and Szabolcs Harangi / FB

Fagradalsfjall - 02.06.2021 - Lava thickness maps of the Geldingadalir volcanic eruption - autors référenced / image down

Fagradalsfjall - 02.06.2021 - Lava thickness maps of the Geldingadalir volcanic eruption - autors référenced / image down

HUGE LAVA FALLS - BEST SPACTACLE ON EARTH RIGHT NOW - Iceland Volcano Eruption - June 10, 2021 / Traveller In The Whole World

During the morning of June 9, 2021, plumes of water vapor and gas were observed at the Turrialba volcano ... phenomenon which gave it its name (white tower).

Recall that this occurs largely due to the presence of rainwater which, entering the crater and meeting the hot material, turns into water vapor which is then expelled forming these white columns that denote the presence of a lot of water vapor from gases.

 

Source: Ovsicori- UNA

Turrialba - gas and steam plume - 06.10.2021 / 10.59am Ovsicori webcam

Turrialba - gas and steam plume - 06.10.2021 / 10.59am Ovsicori webcam

In Poas, no eruption is reported.
Seismic activity is similar, compared to yesterday.
Frequent low amplitude earthquakes of 1 to 10 Hz are detected. The geodesic observations do not show any significant deformation of the volcanic building. Gas ratios are stable.

 

A note: a historic first, this June 9, with the flight over the hyperacid lake of Poas (temperature: 10 ° C - pH: 0.31) by a Matrice Pro 600 drone, dedicated to surveillance and research.

 

Sources: OVSICORI-UNA & LAGAT-UNA / Geospatial Innovation

Poas - drones photo 09.06.2021 - Foto Manuel HC GEOINN / Geospatial Innovations - via Maria Martinez

Poas - drones photo 09.06.2021 - Foto Manuel HC GEOINN / Geospatial Innovations - via Maria Martinez

Poas - drone photo 09.06.2021 - Doc. OVSICORI-UNA & LAGAT-UNA / Geospatial Innovation

Poas - drone photo 09.06.2021 - Doc. OVSICORI-UNA & LAGAT-UNA / Geospatial Innovation

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 Ili Lewotolok - 08.06.2021 / 6:50 p.m. WITA - Doc. PVMBG - KSEDM / Magma Indonesia

Ili Lewotolok - 08.06.2021 / 6:50 p.m. WITA - Doc. PVMBG - KSEDM / Magma Indonesia

Ili Lewotolok - seismicity at 07.06.2021 - Doc. Magma Indonesia

Ili Lewotolok - seismicity at 07.06.2021 - Doc. Magma Indonesia

The eruption of Mount Ili Lewotolok, East Nusa Tenggara continues, with this June 8, 2021 at 6:10 p.m. WITA, an explosion, accompanied by a column of gray and thick ash, observed at ± 500 m above the summit (at ± 1,923 m above sea level).

This eruption was recorded on a seismograph with a maximum amplitude of 4 mm and a duration of 30 seconds.

Communities around Mount Ili Lewotolok as well as visitors / climbers / tourists are recommended not to engage in activities within 3 km of the summit / crater of Mount Ili Lewotolok. The community of Jontona Village should always be aware of the potential threat of weathered material avalanches which may be accompanied by hot clouds originating from the southeastern portion of G. Ili Lewotolok peak / crater.

The activity level is 3 / siaga

 

Sources: PVMBG-KESDM & Magma Indonesia

Gareloi - 05.23.2021, and its persistent fumarole zone on the western edge of the south crater - AVO

Gareloi - 05.23.2021, and its persistent fumarole zone on the western edge of the south crater - AVO

A slight increase in seismic activity was observed at Gareloi volcano in the Aleutians on May 18, and from May 27 there was a sustained increase in the rate and size of small volcanic earthquakes.

Because the level of seismic activity is now higher than the background noise, the AVO increases the Aviation Color Code to YELLOW and the Volcanic Alert Level to ADVISORY. There have been no other noticeable changes to the volcano in satellite data or web camera views. Sulfur dioxide has been detected in satellite images from Gareloi over the past week and matches measurements of recent years. No activity was observed by an AVO field team flying over the summit on May 23.

The Gareloi volcano persistently emits magmatic gases from a field of fumaroles on the southern crater and generally exhibits low-level seismic activity. These observations suggest the presence of shallow magma and a potential interaction with a hydrothermal system. The current increase in seismicity likely reflects a change in the magmatic-hydrothermal system, but it is not clear that the likelihood of a volcanic eruption has increased. AVO will continue to monitor activity to determine if recent changes are related to the influx of new magma or other changes in the magma system.

Gareloi is monitored by a local seismic and infrasound network, satellite data and regional infrasound and lightning detection networks.

 

Source: AVO

Fagradalsfjall - numerous overflows at the active vent - photo this 08.06.2021 / 09.46.20 - new webcam mbls

Fagradalsfjall - numerous overflows at the active vent - photo this 08.06.2021 / 09.46.20 - new webcam mbls

The eruption continues at Fagradalsfjall, with numerous lava overflows at the only active crater, and in the Náttagha valley, smoke emissions at the lava front (wildfires?) Which block the view of the lava flowing down the slope in the valley.

Fagradalsfjall - numerous overflows at the active vent - photo this 06/08/2021 / 1:04 p.m. - new mbls webcam

Fagradalsfjall - numerous overflows at the active vent - photo this 06/08/2021 / 1:04 p.m. - new mbls webcam

Fagradalsfjall eruption, Nattagha Valley - Screen capture of the flow front with smoke masking the flows at the bottom of the valley / the car gives the scale - mbls webcam / screenshot 08.06.2021

Fagradalsfjall eruption, Nattagha Valley - Screen capture of the flow front with smoke masking the flows at the bottom of the valley / the car gives the scale - mbls webcam / screenshot 08.06.2021

Volcanologist Þorvaldur Þórðarson comments on the Fagradalsfjall eruption:

"... All types of basalt lava that existed on earth formed, without the productivity of the eruption changing to any extent.

If you think about the productivity of this rash, it was pretty consistent, only variability and no big changes.

However, we first see big changes in the behavior of the eruption in crater activity. We started off with some pretty weak gas bubbles that burst as they rose to the surface and splashed here and there and maybe tiny jets of magma. Then we switched to continuous magma jet activity for a while, then we switched to higher impulse activity where it happened in cycles, then we got very high magma jets and powerful. So now we are in the Spattering / Splash circle {...}

"We received confirmation of some theories and ideas, as with pyroclastic particles, they changed over time, their outer surface actually became more like glass when the activity of the magma jet was at its strongest. , but at first it was a much duller surface and not as well defined ", explains Þorvaldur. "Many years ago I put forward the idea that such a glazed surface of pyroclastic particles from such eruptions formed because hot gas circulated around the particles so quickly that they melted the shell. external. And that's exactly what they do, so I have confirmation of that. It's one of those funny things. "  -  (extracts from an interview with RUV)

 

Sources: RUV, mbls

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 Sinabung - the dome after eruption of June 6 - photo 08.06.2021 by Firdaus Surbakti from Desa Payung / via Beidar Sinabung

 Sinabung - the dome after eruption of June 6 - photo 08.06.2021 by Firdaus Surbakti from Desa Payung / via Beidar Sinabung

In Sinabung, after the eruption of July 6, 2021 at 11:50 p.m. WIB, the morphology of the summit dome has changed significantly. The rim has exploded and leaves only a central needle.

At the seismic level, since May 15 of this year, we have noticed an increase in the number of hybrid / multiphase earthquakes ... whereas until then, it was earthquakes linked to collapses that dominated.

 

Sources Beidar Sinabung & Magma Indonesia

Sinabung - seismicity at 07.06.2021 - Doc. Magma Indonesia

Sinabung - seismicity at 07.06.2021 - Doc. Magma Indonesia

Following low magnitude earthquakes, which are not published automatically, a virtual meeting was held between the IGEPN teams and the WCC of the canton of Baños on the activity of Tungurahua.

The latest earthquakes felt in the town of Baños, of magnitudes less than 2.9 and shallow, are associated with faults nearby. They do not pose a threat to the population.

Monitoring of the volcano remains permanent; its surface activity is very low, and the internal activity remains low, both unchanged.

Tungurahua - photo archives 08.2018 / José Luis Espinosa Naranjo

Tungurahua - photo archives 08.2018 / José Luis Espinosa Naranjo

The Reventador presents a high surface activity, with an increasing tendency, and a moderate internal activity, without change. In terms of seismicity, on June 7/11 a.m., there were 12 explosion earthquakes, 37 LP earthquakes and 4 tremor episodes.

Two ash emissions are reported by VAAC Washington, at a max. 700 m. above the summit.

The alert level remains in Naranja.

Reventador - plume of ash and gas - photo 05.06.2021 / IGEPN webcam Copete

Reventador - plume of ash and gas - photo 05.06.2021 / IGEPN webcam Copete

In recent days, heavy rains have affected the surroundings of Sangay and are responsible for the remobilization of the ashes. This phenomenon has been recurring since May 2019. It is advisable not to access the drainages of the Volcán and Upano rivers.

 

Source for these three Ecuadorian volcanoes: IGEPN

Sangay - photo 05.31.2021 Ana Lucia Estrella / via IGEPN

Sangay - photo 05.31.2021 Ana Lucia Estrella / via IGEPN

In the Reykjanes peninsula, the activity of Fagradalsfjall continues.

The lava is already flowing over the two protective walls which had been built to slow the flow of lava towards the valley of Nátthaga, where it evolves less quickly at the level of the ephemeral pond; lava could continue to flow south and threaten a fiber optic cable and the Suðurstrandarvegur road. Superintendent Rögnvaldur Ólafsson explains that the protective walls are still standing, although lava is flowing over them.

New hiking trails leading to the site of the Fagradalsfjall eruption in southwest Iceland are under consideration following a threat of recovery from Geldingadalur.

Pollution by volcanic gases, on the rise this weekend, has decreased, following a change in the direction of the winds and their greater force.

New webcams have been installed; references are below.

 

Sources: RUV, mbls, IMO

Geldingadalir Volcano,vent #5 - Close-up timelapse June 7th 2021

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Fagradalsfjall - 05.06.2021 / 10h29 - overflow of the west dam towards the Nátthaga valley - webcam Veðurstofa Íslands / Meradalur - one click to enlarge

Fagradalsfjall - 05.06.2021 / 10h29 - overflow of the west dam towards the Nátthaga valley - webcam Veðurstofa Íslands / Meradalur - one click to enlarge

Fagradalsfjall - 05.06.2021 / 19h31 - overflow of the west dam - webcam RUV Langihryggur

Fagradalsfjall - 05.06.2021 / 19h31 - overflow of the west dam - webcam RUV Langihryggur

On the morning of June 5, the Meteorological Office team noticed an increase in turbulence and gas emissions during the eruption in Fagradalsfjall.

A lava overflow occurred at the western dam and a very rapid lava flow flowed into the Nátthaga valley. The lava advanced to the ephemeral pond, while widening; it is fed by a bifid flow at the level of the drop closing the valley to the north.

South of Geldingadalur, the flow has thickened and is heading south of the valley and could descend into Nátthaga, and block hiking trail A and access to the eruption.

 

Sources: RUV, mbls, local observers

Fagradalsfjall eruption - Nátthaga Valley, the flow reaches the ephemeral pond - 05.06.2021 / 10:09 pm - webcam RUV Langihryggur

Fagradalsfjall eruption - Nátthaga Valley, the flow reaches the ephemeral pond - 05.06.2021 / 10:09 pm - webcam RUV Langihryggur

The lava has pierced the western wall and is flowing at high speed into Syðri Meradalur (valley above Natthagi) and the lava is spreading over this valley in a large hot lake.

Nátthaga Valley - flow progress timelapse from 05.06.2021 - new mbls camera

In Sinabung, this June 6 from 11:35 pm WIT, an eruption generating a pyroclastic flow occurred. It could not be observed directly because of the fog, but Sadrah Peranginangin reports fallout of small pumice stones on the villages of Kuta Gugung and Kuta Rayat around midnight.

 

An Incandescent zone remained visible above the village of Sigarang-garang; the cause is not clearly identified, lava or pyroclastic flow, because of the fog blanket.

Several villages on the slopes of the Sinabung were hit by a hail of stones and gravel, the ash was confirmed to have reached Stabat.

Sinabung - plot on the seismogram of 06.06.2021 / 11:50 p.m. APG - and pumice samples - photos Sadrah Peranginangin / Beidar - one click to enlarge Sinabung - plot on the seismogram of 06.06.2021 / 11:50 p.m. APG - and pumice samples - photos Sadrah Peranginangin / Beidar - one click to enlarge

Sinabung - plot on the seismogram of 06.06.2021 / 11:50 p.m. APG - and pumice samples - photos Sadrah Peranginangin / Beidar - one click to enlarge

The seismicity of June 6 from 6 to midnight local is characterized by;

- 1 eruption earthquake; with an amplitude of 36 mm and a duration of 85 seconds.
- 1 pyroclastic flow collapse earthquake, with an amplitude of 120 mm and a duration of 421 seconds.
- 9 avalanche earthquakes, with an amplitude of 6-37 mm and an earthquake duration of 31-163 seconds.
- 23 hybrid / multiphase earthquakes with an amplitude of 2-23 mm, S-P was not observed and the duration of the earthquake was 6-21 seconds.
- 1 distant tectonic earthquake with an amplitude of 72 mm lasting 57 seconds.

 

The activity level remained at 3 / siaga

The community and visitors / tourists should not conduct activities in the relocated villages, as well as the locations within a radial radius of 3 km from the summit of Mount Sinabung, as well as a sector radius of 5 km for the southeast sector, and 4 km for the east-north sector.
In the event of ash rain, people are advised to wear masks when leaving the house to reduce the health impact of volcanic ash. Secure drinking water facilities and clean roofs of houses from heavy volcanic ash so that they do not collapse.
People who live and live near rivers that originate at Mount Sinabung to stay alert to the dangers of lahars.

 

Sources: PVMBG, Magma Indonesia, Beidar Sinabung / Sadrah Peranginangin

  Suwanosejima - plume to 1500 m on 2021.07.06 / 14h41 - 14h42  - webcam JMA

Suwanosejima - plume to 1500 m on 2021.07.06 / 14h41 - 14h42 - webcam JMA

In the Ryukyu archipelago, the eruption continues in Suwanosejima, with this June 7 at 2:38 pm, an explosion accompanied by a plume entering the clouds at an altitude of 1,500 meters; the plume is heading northeast.

 

Source: JMA webcams

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The last eruption of Sinabung, on Sumatra, occurred on June 4, 2021 and the height of the eruptive column was not observed.


On June 5, the dome was clearly visible; it was topped with a light plume of gas. Thanks to Endro for the recent photos.

Thanks to the seismographic recordings of June 5, 2021, it was recorded: 1 -1 low frequency earthquake
- 55 times the hybrid / multiphase earthquake
- 2 times the deep volcanic earthquake
- 1 local tectonic earthquake
- 1 distant tectonic earthquake.

Note a different seismicity since mid-May 2021.

Sinabung - the summit on 06.05.2021 - photo Endro Rusharyanto - one click to enlarge

Sinabung - the summit on 06.05.2021 - photo Endro Rusharyanto - one click to enlarge

Sinabung - the summit on 06.05.2021 from another angle- photo Endro Rusharyanto - one click to enlarge

Sinabung - the summit on 06.05.2021 from another angle- photo Endro Rusharyanto - one click to enlarge

Sinabung -  seismicity at 05.06.2021 - Doc. PVMBG / Magma Indonesia - one click to enlarge

Sinabung - seismicity at 05.06.2021 - Doc. PVMBG / Magma Indonesia - one click to enlarge

The activity level remains at 3 / siaga. The last VONA sent the color code Orange, published on June 3, 2021, at 8:05 p.m. WIB. Volcanic ash is not observed because it is covered with fog.

The community and visitors / tourists should not conduct activities in the relocated villages, as well as the locations within a radial radius of 3 km from the summit of Mount Sinabung, as well as a sector radius of 5 km for the southern sector. east, and 4 km for the northeast sector.
In the event of ash fallout, people are advised to wear masks when leaving home to reduce the health impact of volcanic ash and to secure drinking water facilities and clean house roofs from ash. thick volcanic so they do not collapse
People who live and live near the rivers that originate at Mount Sinabung should remain vigilant against the dangers of lahars.

 

Sources: PVMBG, Magma Indonesia and photos of Endro Rusharyento.

Taal volcano island - gas and steam plume - photo archives co ABS-CBN News 24.05.2021

Taal volcano island - gas and steam plume - photo archives co ABS-CBN News 24.05.2021

During the last 24 hours, the seismic network of the Taal volcano has not detected any volcanic earthquakes, however, a low-level background quake has persisted since April 8, 2021. The activity of the main crater has been dominated by the rise of hot volcanic fluids in its lake which generated plumes of 500 meters high which drifted towards the south-east. Sulfur dioxide (SO2) emissions averaged 1,898 tonnes / day on June 5, 2021.

The island of the Taal volcano started to deflate in April 2021 while the Taal region is swelling and expanding very slowly and steadily at a decreasing rate since the eruption of 2020. These parameters indicate a decrease in magmatic activity deep under the building.

Despite the insistence of local authorities to lower it, alert level 2 (increased unrest) is currently maintained on the Taal volcano. DOST-PHIVOLCS reminds the public that at Alert Level 2, sudden steam or phreatic explosions, volcanic earthquakes, minor ash falls and fatal accumulations or expulsions of volcanic gas can occur and threaten areas in and around TVI. DOST-PHIVOLCS strongly recommends that entry be strictly prohibited into the volcanic island of Taal, the permanent danger zone or PDZ of Taal, especially the surroundings of the main crater and Daang Kastila fissure, as well as the occupation and boating on Taal Lake

 

Sources: Phivolcs and Manilla Times

This view from the top of Mauna Loa looks northeast. The eastern flank of Mauna Kea is to the left, and North Pit, at the northeast end of Moku'āweoweo, is opposite - HVO-USGS photo - one click to enlarge

This view from the top of Mauna Loa looks northeast. The eastern flank of Mauna Kea is to the left, and North Pit, at the northeast end of Moku'āweoweo, is opposite - HVO-USGS photo - one click to enlarge

Mauna Loa volcano on Big Island / Hawaii is not erupting. The current level of volcanic alert remains at Advisory and the aviation code at Yellow.

Seismicity rates at the summit remain slightly high and above long-term background levels, with around 55 low-magnitude earthquakes below Mauna Loa, most concentrated below the summit and elevation flanks of the volcano. All of the earthquakes last week were below M3 and mostly occurred at depths less than 8 km (about 5 mi) below ground level.
Other Mauna Loa monitoring data feeds show no significant changes in deformation rates or patterns that would indicate increased volcanic risk at present.
Gas concentrations (below 2 ppm SO2) and fumarole temperatures (below 100 degrees Celsius) at the summit and Sulfur Cone in the southwest rift zone remain stable.

 

Source: HVO-USGS

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