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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
Kilauea - eruption this 12/20/2020 / from 9:36 p.m. HST - Doc. HVO

Kilauea - eruption this 12/20/2020 / from 9:36 p.m. HST - Doc. HVO

Kilauea - Halema'uma'u crater - eruption this 12/20/2020 10:38 p.m. HST - therm.USGS webcam - HVO

Kilauea - Halema'uma'u crater - eruption this 12/20/2020 10:38 p.m. HST - therm.USGS webcam - HVO

A seismic swarm began on the evening of December 20 in Kilauea, accompanied by ground deformation detected by inclinometers.

Shortly after approximately 9:36 p.m. HST on December 20, the USGS Hawaiian Volcano Observatory (HVO) detected a glow in Halema'uma'u Crater at the top of Kīlauea Volcano.

An eruption has started in the summit caldera of Kīlauea. The situation is changing rapidly and the HVO will issue another statement when more information becomes available.

According to the first data, this is a small eruption limited to the caldera ... to be continued!

As a result, the HVO raised Kīlauea's volcanic alert level to WARNING and its aviation color code to RED.

Kilauea - Halema'uma'u crater - 12.20.2020 / 10:40 p.m. - USGS

Kilauea - Halema'uma'u crater - 12.20.2020 / 10:40 p.m. - USGS

On December 2, 2020, GPS stations and inclinometers recorded a ground deformation event at the summit of Kīlauea. Accompanied by earthquake swarms, the observed soil deformation patterns were consistent with a small intrusion of levee magma below the southern part of the Kīlauea caldera. The injection resulted in an uplift of about 8 cm (3 inches) of the caldera floor, and modeling suggests that it represented 0.4 to 0.7 million cubic meters (yards) of magma accumulated at about 1 , 5 km (1 mile) below the surface. Although the intrusion did not reach the surface and did not erupt, it represented a notable intrusion compared to trends seen in Kīlauea summit surveillance data streams after the 2018 eruption ended.

 

On December 17, 2020, seismometers detected a noticeable increase in the occurrence and duration of long-period seismic signals below the summit of Kīlauea, which is attributed to magmatic activity. While this type of seismicity was seen on average once every few weeks after the 2018 eruption, rates have increased to more than a dozen over the past few days.

 

Source: HVO- USGS

Klyuchevskoy - image Sentinel-2 L1C bands 12,11,4 from 21.12.2020 - one click to enlarge

Klyuchevskoy - image Sentinel-2 L1C bands 12,11,4 from 21.12.2020 - one click to enlarge

The explosive-effusive eruption continues in Klyuchevskoy, with this December 21 the emission of a cloud of ash at 6,000-7,000 meters asl. extending 152 km northwest of the volcano.

Despite the attenuation of the signals by the cloud cover, the thermal anomaly remains at a VRP of 988 MW on December 21 at 2:50 a.m.

 

The aviation code remains at orange, other explosions which may have occurred and impact air traffic.

 

Sources: Kvert, Mirova & VAAC Tokyo

Klyuchevskoy - Doc._Sentinel-2 Mirova _Last 20.12.2020 / 00h31

Klyuchevskoy - Doc._Sentinel-2 Mirova _Last 20.12.2020 / 00h31

Klyuchevskoy - Volcanic ash advisory Doc. VAAC Tokyo 21.12.2020 / 05h22Z

Klyuchevskoy - Volcanic ash advisory Doc. VAAC Tokyo 21.12.2020 / 05h22Z

Ruapehu's Te Wai ā-moe crater lake continues to heat and is now at 43 ° C. Warming has been accompanied by bursts of volcanic tremor and a marked increase in the amount of gas flowing through the crater lake .

The volcanic alert level has been raised to level 2 and the aviation color code has been changed to yellow.

On a gas flight last week, the lake was observed to be a uniform gray color, showing that it is well mixed. There is some flow on the outlet. The production of gas through the crater lake has also increased dramatically in response to this heating cycle. The quantities of carbon dioxide (CO2) and sulphurous gas (SO2 and H2S) in the plume are the highest measured in the last two decades. The continuous flow of gas and hydrothermal fluids through the lake shows that the underlying ventilation zone is open.

 

The volcanic quake is produced as short-lived pulses that coincide with an increase in gas passing through the crater lake and its plumbing system. Modeling of the energy input to the lake has shown an increase over the past month from around 200 MW to around 400 MW. Since 2007, Crater Lake's temperature has exceeded 40 ° C on several occasions without causing an eruption. However. the combination of increased lake temperature, volcanic tremor and gas production motivated the change in alert level.

 

Source: GEONET

Ruapehu - 12.21.2020 - The area within 2 km of Te Wai ā-moe / Crater Lake is closed to the public and concessionaires due to the increased risk of eruption. - Doc. GeoNet

Ruapehu - 12.21.2020 - The area within 2 km of Te Wai ā-moe / Crater Lake is closed to the public and concessionaires due to the increased risk of eruption. - Doc. GeoNet

During the month of November 2020 in the region of the Phlegraean Fields, 225 low-energy earthquakes were recorded with a maximum magnitude = 1.1 ± 0.3. 204 events (91%) had a magnitude less than 1.0, demonstrating a very low energy level; out of 17 events, it was not possible to determine the magnitude due to the low amplitude of the signal which is not clearly distinguishable from the background noise. A total of 124 events (55% of those recorded) were located mainly between Pozzuoli and the Solfatara-Pisciarelli region with depths not exceeding 2.5 km.

 

The soil deformation monitoring networks confirm a radial geometry of the ascent centered in the Pozzuoli area with an average speed of around 10 mm / month. The ascent recorded at the GPS station of Rione Terra (RITE) from January 2016 is approximately 39 cm. Thermographic measurements in the monitored areas show noticeably stable temperature trends with a slight downward trend. The geochemical parameters confirm the upward trends already observed previously.

 

Everything therefore seems under control and within standards.

 

Source: INGV - Osservatorio Vesuviano

Phlegraean Fields - image NASA_ISS004-E-5376

Phlegraean Fields - image NASA_ISS004-E-5376

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Publié le par Bernard Duyck
Publié dans : #volcanic activity

In the Ryukyu archipelago, the eruption continues at Suwanoejima, at Mitake crater.

The JMA reported a plume of ash on December 19 at 10:56 p.m., rising to 1,300 meters above the crater, and drifting towards the southeast.

This December 20 at 07:46 am, a plume is observed at 1,100 meters above the crater, with a dispersion towards the south-east.

Also on December 20 at 8:37 am, an ash plume was observed at 1,330 meters above the crater as it entered the clouds; the drift is towards the south-east.

 

Sources: JMA & VAAC Tokyo

Suwanosejima -19.12.2020 / 33h59 - JMA webcam

Suwanosejima -19.12.2020 / 33h59 - JMA webcam

Suwanosejima - 12.20.2020 / 12:40 - JMA webcam

Suwanosejima - 12.20.2020 / 12:40 - JMA webcam

At Klyuchevskoy, an explosive-effusive activity continues, with the emission of an ash plume at 6,000-6,500 meters asl. stretching 65 km northeast of the volcano.

The aviation code remains orange, other ash explosions can occur at any time.

The effusion feeds a lava flow on the southern flank of the volcano

Mirova noted very high thermal anomalies on December 20, with a VRP of 1,034 MW at 12:15 a.m., 1,491 Mw at 1:55 a.m. and 1,176 MW at 2:05 a.m.

 

Sources: KVERT, VAAC Tokyo & Mirova

Klyuchevskoy - Thermal anomalies at 20.12.2020 / 02:05 - Doc. Mirova_MODIS_logVRP

Klyuchevskoy - Thermal anomalies at 20.12.2020 / 02:05 - Doc. Mirova_MODIS_logVRP

The Klyuchevskoy remaining under the clouds, the photo is from 08.12.2020 (from left to right, the Bezymianny, the Kamen and the Klyuchevskaya Sopka) - photo Y. Demyanchuk - Volkstat.ru

The Klyuchevskoy remaining under the clouds, the photo is from 08.12.2020 (from left to right, the Bezymianny, the Kamen and the Klyuchevskaya Sopka) - photo Y. Demyanchuk - Volkstat.ru

During the last 24 hours, thanks to the monitoring systems of the Popocatépetl volcano, 225 exhalations have been identified, accompanied by emissions of water vapor, volcanic gases and small amounts of ash. In addition, 109 minutes of low amplitude tremor were recorded.

During the night, and in the morning, a light emission of water vapor and gas was observed, at the time of this report there is a partial visibility of the volcano, any emission will have a northeast direction.

CENAPRED urges not to approach the volcano and especially the crater, because of the danger posed by the fall of ballistic fragments and, in the event of heavy rains, to stay away from the bottom of the ravines because of the danger of flows mud and garbage.

The Popocatépetl volcanic alert semaphore is on YELLOW PHASE 2.

 

Source: Cenapred

Popocatépetl - 18.12.2020 / 10:17 - webcams of Mexico

Popocatépetl - 18.12.2020 / 10:17 - webcams of Mexico

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
 Poas - fumarole on the inner eastern side of the crater - Doc. Ovsicori 16.12.2020 / D.U.Castro

Poas - fumarole on the inner eastern side of the crater - Doc. Ovsicori 16.12.2020 / D.U.Castro

In Costa Rica, the Poas volcano has presented a new fumarole on the eastern side of the crater for a few days, reported by Danilo Umana Castro.

The photo dates from December 16, the crater having been subsequently masked by fog on December 17 and part of the day on December 18. When there is a gap providing sufficient visibility on the crater, we no longer notice the fumarole on the webcam.

The seismic activity remains comparable to that of the previous days, and the other parameters are within the standards.

 

Source: Ovsicori

Poas - 12/18/2020 5:38 p.m. - Ovsicori webcam

Poas - 12/18/2020 5:38 p.m. - Ovsicori webcam

In Villarica, Chile, we can observe this December 16 several new ash emissions, a.o. At 08:45, 11:48, 11:56,12:41, ... activity in progress.

 

The Sernageomin reported an LP earthquake on December 17 at 5:16 pm local time, accompanying an emission of particulate matter in the form of a plume rising to a maximum of 720 meters; and derivative ESE.

The technical alert is maintained in Amarilla.

Onemi also maintains this level for the Villarrica, Pucón and Curarrehue municipalities in the La Araucanía region and the Panguipulli municipality in the Los Ríos region.

 

Sources: Sernageomin, Onemi and POVI

Villarica - Calendar of explosive activity since August 2020 and one of the explosions of 16.12.2020 - Doc. POVI
Villarica - Calendar of explosive activity since August 2020 and one of the explosions of 16.12.2020 - Doc. POVI

Villarica - Calendar of explosive activity since August 2020 and one of the explosions of 16.12.2020 - Doc. POVI

Villarica - plume of the explosion of 12/17/2020 / 5:16 p.m. - Sernageomin report

Villarica - plume of the explosion of 12/17/2020 / 5:16 p.m. - Sernageomin report

At Sinabung, the white summit plume is observed between 50 and 500 meters above the summit on December 18,. The dome is still growing, more and more cantilevered, and dangerous.

Thanks to the seismographic records of December 18, 2020, it was recorded:

- 90 collapse / avalanche earthquakes

- 4 blast / emission earthquakes

- 16 low frequency earthquakes

- 31 hybrid / multiphase earthquakes

- 1 distant tectonic earthquake.

 

The activity level remains at 3 / siaga, with a recommendation for communities and visitors / tourists not to carry out activities in the villages that have been displaced, as well as within a radial radius of 3 km from the summit of G. Sinabung, and a sector radius of 5 km for the south-eastern sector and 4 km for the east-north sector.

 

Sources: PVMBG & Magma Indonesia

Sinabung - 12.19.2020 - photo Nachelle Homestay

Sinabung - 12.19.2020 - photo Nachelle Homestay

Sinabung - 19.12.2020 - the dome in a precarious balance - photo Nachelle Homestay "the place to be"

Sinabung - 19.12.2020 - the dome in a precarious balance - photo Nachelle Homestay "the place to be"

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
Etna - 3 active mouths in the morning on 12/15/2020 at the south-eastern crater, and lava flow - Doc. INGV

Etna - 3 active mouths in the morning on 12/15/2020 at the south-eastern crater, and lava flow - Doc. INGV

Etna - ash emissions on 12.15.2020 from 6.30 am UTC - photo EtNative / Fabricio Zuccarello

Etna - ash emissions on 12.15.2020 from 6.30 am UTC - photo EtNative / Fabricio Zuccarello

Etna - ash emission on 12/15/2020 / 08h58 - LAVE webcam

Etna - ash emission on 12/15/2020 / 08h58 - LAVE webcam

After a decrease in the activity of Etna during the night, Strombolian activity is detected on the morning of December 15 from three mouths on the south-eastern crater: the one called "della Sella", both others in the eastern part of the cone.

From around 06:30 UTC, there is a heavy emission of ash, which forms a plume towards the south. In addition, sporadic explosions occur from the Voragine crater which produce modest ash emissions; at night, the launch of glowing pyroclastic material was visible.

As of 08:24 UTC, there is a resumption of lava emission from the landslide niche that opened on the southwest flank of the southeast crater during paroxysmal activity from December 13 to evening, forming a lava flow directed towards the southwest. .

From the seismic point of view, the volcanic tremor, during the last hours, showed an increase in its average amplitude from about 06:00 UTC, always maintaining a high value, with its point of origin located- in the zone of the SE crater. The infrasonic activity continues to be sustained: the number and amplitude of infrasonic events remain at a high level, especially during the phases of increasing tremor amplitude.

Etna Crater of the South-East seen at the end of the afternoon of December 15, 2020 by the Milia zone (southwest side); the calm of the moment shows the morphological changes following the activity of December 13. - photo INGV

Etna Crater of the South-East seen at the end of the afternoon of December 15, 2020 by the Milia zone (southwest side); the calm of the moment shows the morphological changes following the activity of December 13. - photo INGV

The intense explosive activity of the three mouths of the Southeast Crater and the emission of the new lava flow continued until the end of the morning of December 15 and was followed by a rapid decline. At the morphological level, we notice an opening towards the bottom of the edge of the "mouth of the Saddle", bordered by deposits of pyroclastic flows, following the activity of December 13th.

By late afternoon, Southeast Crater activity essentially ceased, as ash from Voragine and Bocca Nuova craters continued.

In the evening, the front of the lava flow, around 2900 m, still showed incandescent spots. However, the casting is no longer supplied.

From a seismic point of view, the volcanic quake in recent hours has shown a marked decrease in its average magnitude from around 10:00 hours UTC, currently referring to an average value.

No significant change is observed in the permanent soil deformation networks (clinical and GPS).

 

Source: INGV OE

Sabancaya - activity from 08.12.2020 / 10:48 a.m. - Ingemmet-OVI webcam

Sabancaya - activity from 08.12.2020 / 10:48 a.m. - Ingemmet-OVI webcam

The week of December 7 to 13 in Sabancaya / Peru is marked according to I.G. Peru, by an average of 54 explosions per day, accompanied by plumes of gas and ash reaching 2,800 meters in height.

Eight thermal anomalies are recorded, with VRP between 1 and 22 MW.

894 earthquakes occurred during the aforementioned period.

The volcanic alert level remains in Naranja

 

Sources: IGP and Ingemmet OVI

Sabancaya - summary of the activity between 7 and 13.12.2020 - Doc. I.G. Peru

Sabancaya - summary of the activity between 7 and 13.12.2020 - Doc. I.G. Peru

Sabancaya - parameters as of 16.12.2020 - Doc. Ingemmet

Sabancaya - parameters as of 16.12.2020 - Doc. Ingemmet

In Santiaguito, the Conred observes this December 15 a white degassing plume, which disperses to the west and southwest and reaches heights of up to 500 meters above the volcanic complex.

Mostly weak explosions are observed, generating plumes of gas and ash from a height of 3300 meters above sea level.

 

Source: Conred / Guatemala

News from Etna, Sabancaya, Santiaguito, and Lewotolok.

At Ili Lewotolok, the plume above the crater is

white and gray, thick and high about 200 to 800 meters above the summit.

The seismicity of December 15 is characterized by:

- 38 eruption earthquakes, with an amplitude of 14-30 mm, and lasting 20 to 50 seconds.

- 128 blast / emission earthquakes, with an amplitude of 2 to 24 mm and the earthquake lasted 7 to 40 seconds.

- 8 episodes of non-harmonic tremor

- continuous tremor with an amplitude of 1-5 mm, dominating 1 mm.

 

The activity level is at 3 / siaga. Communities around G. Ili Lewotolok and visitors / climbers / tourists so that they are not located, climbed and have no activities in the risk area in the crater area of ​​G. Ili Lewotolok and in all areas within a 4 km radius of the G Ili Lewotolok summit / activity center.

 

Sources: PVMBG, Magma Indonesia

Ili Lewotolok - 12.15.2020 / 11:12 a.m. WITA - webcam PVMBG Magma Indonesia

Ili Lewotolok - 12.15.2020 / 11:12 a.m. WITA - webcam PVMBG Magma Indonesia

Ili Lewotolok - seismicity as of 12/15/2020 - Magma Indonesia

Ili Lewotolok - seismicity as of 12/15/2020 - Magma Indonesia

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Publié le par Bernard Duyck
Publié dans : #volcanic activity

In the late evening of December 13, 2020, after a few days of low levels of activity at the summit craters of Etna, a sudden increase in the amplitude of the volcanic tremor was observed. At the same time, Strombolian activity at the southeast crater has intensified, shifting to lava fountains (see yesterday's article)

In the following hours a paroxysmal episode consisting of three short phases of lava fountains took place; they also emitted lava flows directed towards the south and the southwest, however remaining at altitudes above 2800 m.

Etna - paroxysm of December 13-14, 2020 - Video Boris Behncke from Tremestieri Etneo 20 km from the summits

A map, established by the Sentinel-5 P satellite of Copernicus, showed evidence of a strong plume of sulfur dioxide.

Etna - sulfur dioxide plume -image Sentinel-5P 12/14/2020

Etna - sulfur dioxide plume -image Sentinel-5P 12/14/2020

Etna de Tremestieri Etnéo (south ethnean slope), weak Strombolian activity and several incandescent points along the lava flow towards the southwest - photo Boris behncle 14.12.2020 early morning

Etna de Tremestieri Etnéo (south ethnean slope), weak Strombolian activity and several incandescent points along the lava flow towards the southwest - photo Boris behncle 14.12.2020 early morning

In addition, field surveys carried out on December 14 by the INGV OE showed significant morphological changes in the cone of the SE Crater, in particular the absence of the southwestern part of the crater due to collapse phenomena. The latter on the night of December 13 generated the three pyroclastic flows. The second pyroclastic flow of 22:16 UTC, which was the most energetic, traveled about 2 km west of Monte Frumento Supino.

Since 12:52 p.m. on December 14, the explosive activity has produced an eruptive cloud that disperses towards the south reaching a maximum quota of about 4 km at sea level.

Etna SEC - ash emissions on 14.12.2020 afternoon - photo INGV

Etna SEC - ash emissions on 14.12.2020 afternoon - photo INGV

Etna - 12/14/2020 / 5:28 p.m. - LAVE webcam

Etna - 12/14/2020 / 5:28 p.m. - LAVE webcam

On the evening of December 14, we observe tall lava fountains and the emission of lava flows to the south and southwest.

A beautiful strombolian activity marked two mouths of the Crater of the South-East (that of the " Saddle " and what is called " New Crater of the South-East "). Sometimes, after a while, activity is visible at the Voragine Crater.

Seismic signals do not show significant changes. The GPS and clinometric networks do not show any significant deformation in progress.

 

Source: INGV OE

Etna SEC - 14.12.2020 - 2 active mouths in the evening - photo Boris Behncke

Etna SEC - 14.12.2020 - 2 active mouths in the evening - photo Boris Behncke

Etna -14.12.2020 in the evening - activity at the SE crater (foreground) and sporadic at La Voragine (background left) - photo boris Behncke

Etna -14.12.2020 in the evening - activity at the SE crater (foreground) and sporadic at La Voragine (background left) - photo boris Behncke

At Semeru, the eruptive plumes and those linked to the collapses could not be observed on December 14 due to the fog.

An avalanche occurred, with a sliding distance of 300 to 1,500 m from the end of the lava flow towards Besuk Kembar and Kobokan.

Thanks to the seismographic records of December 14, 2020, it was recorded:

- 10 eruption earthquakes

- 1 blast / emission earthquake

- 9 episodes of Harmonic tremor

- 1 deep volcanic earthquake

- 6 distant tectonic earthquakes

Semeru - incandescence at the top and on the flanks - photo 12.15.2020 / 12.01 a.m. - via Rizal Twitter

Semeru - incandescence at the top and on the flanks - photo 12.15.2020 / 12.01 a.m. - via Rizal Twitter

This December 15 at the very beginning of the day, the lava flow and the summit incandescence were observable.

VAAC Darwin issued an ash scatter advisory at flight altitude 140, as did an orange VONA.

In level II status (Alert), it is recommended for people / visitors / tourists not to have activities within a radius of 1 km from the crater / summit of Mount Semeru and at a distance of 4 km from the direction of the opening of the crater in the south-southeast sector, and to remain aware of pyroclastic flows of avalanches, lava avalanches and lahars along the rivers / valleys that originate at the top of Mount Semeru. The recommended radius and distance will be continuously evaluated in anticipation of any change in hazard symptoms.

 

Sources: PVMBG & VAAC Darwin

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Publié dans : #volcanic activity
Etna SEC - 12/14/2020 / 00h50 - photo Gio Giusa

Etna SEC - 12/14/2020 / 00h50 - photo Gio Giusa

On December 13 at around 7.20 p.m., an increase in Stombolian activity in the south-eastern crater of Etna was observed, accompanied by an increase in the magnitude of the volcanic tremor and infrasonic activity.

This explosive activity decreases significantly from 10:50 p.m. The effusive activity, produced at the level of two eruptive cracks on the southern flank of the SEC, feeds two lava flows towards the SW and the S.

Furthermore, from the more detailed analysis of the camera images, three pyroclastic fluxes were observed which developed, two in conjunction with the opening of the SW eruptive fissure respectively at 10:15 p.m. and 10:16 p.m. UTC and the third at approximately 10:30 p.m. UTC on December 13. All three currents spread in a SW direction, with the most intense, 22:16 UTC, which passed Mount Frumento Supino well.

The images also showed, in the most intense phases of the explosive activity, the passage to the lava fountain, particularly between 10:00 p.m. and 10:50 p.m. UTC on December 13, 11:50 p.m. UTC on December 13 and 00 10 p.m. UTC on December 14, and approximately 1:10 and 1.23 a.m. UTC on December 14. During the fountain phases, the maximum values ​​of the amplitude of the volcanic tremor were recorded.

 

Source: INGV OE

Etna SEC - 13.12.2020 / 22:16 UTC - second pyroclastic flow - Doc. INGV

Etna SEC - 13.12.2020 / 22:16 UTC - second pyroclastic flow - Doc. INGV

Etna - 12/13/2020 / 11:59 p.m. - therm webcam. EMOT / INGV and 14.12. 2020 / 00:28 - webcam LAVE - one click to enlargeEtna - 12/13/2020 / 11:59 p.m. - therm webcam. EMOT / INGV and 14.12. 2020 / 00:28 - webcam LAVE - one click to enlarge
Etna - 12/13/2020 / 11:59 p.m. - therm webcam. EMOT / INGV and 14.12. 2020 / 00:28 - webcam LAVE - one click to enlarge

Etna - 12/13/2020 / 11:59 p.m. - therm webcam. EMOT / INGV and 14.12. 2020 / 00:28 - webcam LAVE - one click to enlarge

Etna - thermal anomalies at 12/14/2020 / 01:25 am - Doc. Mirova_MODIS_logVRP

Etna - thermal anomalies at 12/14/2020 / 01:25 am - Doc. Mirova_MODIS_logVRP

The main crater of Sinabung emits a white plume about 100 to 400 meters above the summit.

Seismicity occurs this November 14 between 6 a.m. and 12 p.m. WIB between:

- 22 collapse / avalanche earthquakes, with an amplitude of 2-80 mm and the duration of the earthquake was 14-124 seconds.

- 5 low frequency earthquakes with an amplitude of 4 to 39 mm and the duration of the earthquake was 11 to 40 seconds.

- 2 hybrid / multiphase earthquakes with an amplitude of 3 to 5 mm, and lasting 8 to 10 seconds.

 

The activity level remains at 3 / siaga, with a recommendation to communities and visitors / tourists not to carry out activities in the villages that have been displaced, as well as within a radial radius of 3 km from the summit of G. Sinabung , and a sector radius of 5 km for the south-eastern sector and of 4 km for the east-north sector.

 

Source: PVMBG

Sinabung -13.12.2020 3:45 p.m. WIB - Pyroclastic flow over 1000 meters - PVMBG webcam

Sinabung -13.12.2020 3:45 p.m. WIB - Pyroclastic flow over 1000 meters - PVMBG webcam

Sinabung - morphology of the summit with its cantilevered dome - photo Nachelle homestay 04.12.2020 / 10h08am

Sinabung - morphology of the summit with its cantilevered dome - photo Nachelle homestay 04.12.2020 / 10h08am

In Lewotolok, we observe a white and gray plume, with a height between 100-500 meters above the summit.

Seismic observation of December 13, 2020:

- 49 eruption earthquakes, with an amplitude of 8 to 31 mm, and the duration of the earthquake was 17 to 40 seconds.

- 133 blast / emission earthquakes, with an amplitude of 2 to 29 mm and the earthquake lasted 5.5 to 45 seconds.

- 4 episodes of harmonic tremor with an amplitude of 2 to 6 mm and the earthquake lasted 20 to 80 seconds.

- 26 episode of non-harmonic tremor.

 

This December 14, between 5:49 a.m. and 2:46 p.m. WITA, 5 moderate eruptive plumes were observed.

 

The activity level remains at 3 / Siaga, with a recommendation to communities around G. Ili Lewotolok and visitors / climbers / tourists not to be located, nor to climb and not to practice activities in the danger zone in the G. Ili Lewotolok crater area and in all areas within 4 km of the G Ili Lewotolok summit / activity center.

 

Source: PVMBG

Ili Lewotolok - 13.12.2020 - photo PVMBG

Ili Lewotolok - 13.12.2020 - photo PVMBG

Ili Lewotolok - 12/13/2020 / 07:20 WITA - webcam PVMBG

Ili Lewotolok - 12/13/2020 / 07:20 WITA - webcam PVMBG

Ili Lewotolok - 12/14/2020 / 06:53 am WITA - PVMBG webcam

Ili Lewotolok - 12/14/2020 / 06:53 am WITA - PVMBG webcam

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Publié le par Bernard Duyck
Publié dans : #volcanic activity

The volcanic activity of Sangay has remained high in recent days, with gas and ash emissions more than 2,000 meters above the crater on December 9-10 / 11 a.m., and between 1,800 and 2,100 meters on December 10-11 / 11 a.m.

FIRMS recorded 34 thermal anomalies on 9-10.12.2020 and 51 on 10-11.12.2020

Seismicity is characterized on December 9-10 by 25 LP earthquakes, 99 explosion earthquakes, 33 emission tremor episodes, and 2 harmonic tremor.

For December 10-11, 45 LP earthquakes, 101 explosion earthquakes, 7 emission tremor episodes are counted.

The alert level remains at Amarillo.

 

Sources: IGEPN daily reports

Sangay - 12.11.2020 - Sentinel 5P / TROPOMI has detected a strong sulfur dioxide signal near the Sangay, with 11.01DU of SO2. - Doc. DLR / BIRA / ESA

Sangay - 12.11.2020 - Sentinel 5P / TROPOMI has detected a strong sulfur dioxide signal near the Sangay, with 11.01DU of SO2. - Doc. DLR / BIRA / ESA

In Kamchatka, the Klyuchevskoy continues its moderate explosive-effusive eruption.

Strombolian activity and gas and ash emissions are observed.

The effusion feeds a lava flow on the southern flank of the volcano.

A significant thermal anomaly is revealed by satellite data.

The aviation code remains orange.

 

Sources: KVERT & Mirova

Klyuchevskoy - image Sentinel-2 L1C bands 4,3,2 (nat.colors) from 11.12.2020 - one click to enlarge

Klyuchevskoy - image Sentinel-2 L1C bands 4,3,2 (nat.colors) from 11.12.2020 - one click to enlarge

Klyuchevskoy - image Sentinel-2 L1C bands 12,11,4 from 11.12.2020 - one click to enlarge

Klyuchevskoy - image Sentinel-2 L1C bands 12,11,4 from 11.12.2020 - one click to enlarge

At Sinabung, a visual of the monitoring station in Simpang Empat shows a fall of incandescent blocks on December 12 at 4:39 a.m. WIB, over approximately 1,000 meters to the south-southeast.

The parameters remain within the standards, except for the number of hybrid type earthquakes, increasing  on December 11.

 

Source: PVMBG, Magma Indonesia

Sinabung - 12.11.2020 / 12:25 PM WIB - PVMBG webcam

Sinabung - 12.11.2020 / 12:25 PM WIB - PVMBG webcam

Sinabung - 12.12.2020 / 04:39 WIB - photo Pos PGA Simpang Empat / Rizal

Sinabung - 12.12.2020 / 04:39 WIB - photo Pos PGA Simpang Empat / Rizal

In Hawaii, vigilance is maintained in Kilauea, although its alert level remains at Normal and the aviation code at green.

Between November 30 and December 2, several hundred earthquakes occurred 1-4 km below the summit of Kīlauea and the upper East Rift Zone.

On December 2, a transient increase in ground deformation resulted in an uplift of about 8 cm of the caldera floor. That was about 4 months of lifting in just 4 hours.

After a magnitude 3.1 earthquake on December 2 at 6 p.m. HST, several rockfalls occurred along the scree slope, and impacted the summit lake of Halema'uma'u, causing brief color changes localized by the webcam to the surface.

The water lake at the bottom of Halema'uma'u continues to slowly expand and deepen.

Monitoring data from the Kīlauea summit region indicated that a small injection of magma penetrated below the volcano's surface. Although the magma did not reach the surface, this event demonstrated that the magma continues to fill the volcano's storage system.

 

Source: USGS Volcano Watch

Kilauea - map showing the locations of earthquakes during the past month. Bottom: Depth of earthquakes (circles) over the past month. The size of the circle represents the magnitude and the color indicates the depth - Doc. HVO / USGS
Kilauea - map showing the locations of earthquakes during the past month. Bottom: Depth of earthquakes (circles) over the past month. The size of the circle represents the magnitude and the color indicates the depth - Doc. HVO / USGS

Kilauea - map showing the locations of earthquakes during the past month. Bottom: Depth of earthquakes (circles) over the past month. The size of the circle represents the magnitude and the color indicates the depth - Doc. HVO / USGS

Kilauea, Halema'uma'u Lake - brief localized color changes of the lake surface (circled in yellow) following rockfall following an earthquake at 3 p.m. HST on 02.12.2020 - Doc. HVO / USGS

Kilauea, Halema'uma'u Lake - brief localized color changes of the lake surface (circled in yellow) following rockfall following an earthquake at 3 p.m. HST on 02.12.2020 - Doc. HVO / USGS

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
Fuego - 12.10.2020 - photo William Chigna, Unidad de Prevención de Volcanes, via Conred.

Fuego - 12.10.2020 - photo William Chigna, Unidad de Prevención de Volcanes, via Conred.

In Guatemala, the activity of Fuego is maintained on December 10, with weak to strong explosions, at a rate of 3 to 6 per hour; ash falls are reported on Panimache, Sangre de Cristo, Ojo de Agua, Santa Isabel, and others.

Moderate boulder avalanches are reported in the drainages, some boulders reach the vegetation limit.

A nocturnal incandescence is observed 100-200 meters above the crater.

Fuego - 12.10.2020 - photo William Chigna, Unidad de Prevención de Volcanes / Twitter

Fuego - 12.10.2020 - photo William Chigna, Unidad de Prevención de Volcanes / Twitter

OVSAN reports, for the Santiaguito, a degassing forming a white plume at a height of 3,100 m asl., accompanied by short moments of noise from aircraft turbines, and gas and ash explosions reaching 3,400 m asl.

Boulder avalanches mainly mark the southwest flank, with material reaching the base of the dome and causing fine ash to fall around the perimeter of the volcano.

Due to the location of the block lava flow on the dome of the Caliente dome, the occurrence of boulder flow, and even pyroclastic flows, in a west-southwest direction cannot be ruled out.

 

Sources: Insivumeh and Conred / Daily Bulletin.

Santiaguito - photo Edgar Cabrera, COLRED Finca El Faro / 16.11.2020

Santiaguito - photo Edgar Cabrera, COLRED Finca El Faro / 16.11.2020

At Ili Lewotolok, the plume of the main crater ranges from white, gray, brown to black, with moderate to thick intensity, about 200-300 meters from the summit.

The seismicity of December 10 is characterized by:

- 46 eruption earthquakes, with an amplitude of 6-32 mm, and an earthquake duration of 15 to 47 seconds.

- 64 emission earthquakes, with an amplitude of 2 to 24 mm and the earthquake lasted 5 to 25 seconds.

- 4 harmonic tremor episodes with an amplitude of 3-8 mm

- 9 episodes of non-harmonic tremor, with an amplitude of 1 to 4 mm

The activity level remains at 3 / siaga. Communities around G. Ili Lewotolok and visitors / climbers / tourists so that they are not located, climbed and have no activities in the danger zone in the area of ​​the G. Ili Lewotolok crater and in all areas within a 4 km radius of the G Ili Lewotolok summit / activity center.

 

Source: PVMBG, Magma Indonesia

Ili Lewotolok - 12.10.2020 / 10.54am WITA - PVMBG

Ili Lewotolok - 12.10.2020 / 10.54am WITA - PVMBG

Mauna Loa volcano is not erupting. The rates of deformation and seismicity have not changed significantly over the past week and remain above background levels for the long term.

 

Over the past week, HVO seismometers have recorded around 165 small-magnitude earthquakes (less than M2.5) at Mauna Loa, mostly below the summit and upper flanks of the volcano. The majority of these earthquakes occurred at shallow depths less than 8 kilometers (~ 5 miles) below sea level.

Seismic activity increased on the northwest flank of Mauna Loa on December 4, 2020, including a magnitude 4.1 earthquake and clusters of small, shallow earthquakes occurring at close range in time and location. Since December 4, the HVO has recorded more than 150 earthquakes in this region, at depths of 1-9 km (1-6 miles) below the surface, in an area of ​​less than 4 km (2 miles) and spanning 6 km (4 miles). North. Most of the seismicity was less than magnitude-2 and more than 4 km (2 miles) below the surface.

Swarms of previous earthquakes at this location and depth have occurred in October 2018, April 2017, July 2016, August 2015 and before.

 

Global Positioning System (GPS) measurements continue to show slow, long-term inflation at the summit, consistent with the supply of magma to the volcano's shallow storage system.

The gas concentrations and the temperatures of the fumaroles at the summit and at the sulfur cone in the southwest rift zone remain stable.

Current volcanic alert level: Advisory

Current Aviation Color Code: Yellow.

 

Source: HVO

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The explosive activity of the Karymsky volcano has resumed.

Ash explosions from the volcano up to 6,000 -7,000 m above sea level began at around 8:45 p.m. UTC on December 9. The ash clouds drift north-west of the volcano for 60 km.

A moderate explosive activity continues; the aviation code has changed from yellow to orange.

 

Sources: KVERT & VAAC Tokyo

Karymsky - explosion of 21.10.2020 - photo A. Belousov via Volkstat archives

Karymsky - explosion of 21.10.2020 - photo A. Belousov via Volkstat archives

Karymsky - Volcanis ash advisory as of 12.10.2020 - Doc. VAAC Tokyo

Karymsky - Volcanis ash advisory as of 12.10.2020 - Doc. VAAC Tokyo

In Papua New Guinea, Manam still shows gas emissions on December 5 and 10, respectively to the south-southeast and west.

VAAC Darwin reported an ash emission at an altitude of 2,400 meters, drifting southwest on December 6.

 

Sources: VAAC Tokyo & Sentinel-2

Manam - degassing plume on 05.12.2020 -image Sentinel-2 L1C bands 12,11,4 - one click to enlarge

Manam - degassing plume on 05.12.2020 -image Sentinel-2 L1C bands 12,11,4 - one click to enlarge

Manam - degassing plume on 12.10.2020 -image Sentinel-2 L1C bands 12,11,4 - one click to enlarge

Manam - degassing plume on 12.10.2020 -image Sentinel-2 L1C bands 12,11,4 - one click to enlarge

In Chile, the reconnaissance overflight on December 9 shows that the lava lake of Villarica, about 10 to 15 meters in diameter, is semi-covered by a solidified floating crust.

A very weak incandescence is visible, but only by infrared camera.

Volcanic technical alert remains in Amarilla

 

Sources: POVI & Sernageomin

Villarica - the lava lake during the reconnaissance flight on 09.12.2020 - photo POVI

Villarica - the lava lake during the reconnaissance flight on 09.12.2020 - photo POVI

Villarica - Calendar of explosions on 05.12.2020 - Doc. POVI - one click to enlarge

Villarica - Calendar of explosions on 05.12.2020 - Doc. POVI - one click to enlarge

In Sinabung, on the island of Sumatra, a white plume is observed, of a moderate height about 50-200 meters from the summit.

At the seismicity level, on December 9, 2020, it was recorded:

- 85 collapse / avalanche earthquakes

- 17 low frequency earthquakes

- 13 hybrid / multiphase earthquakes

- 2 distant tectonic earthquakes

The activity level remains at 3 / siaga, with a recommendation not to carry out activities in the villages that have been relocated, as well as within a radial radius of 3 km from the summit of G. Sinabung, and a sector radius of 5 km for the south-eastern sector and 4 km for the east-north sector.

 

Sources: PVMBG & Firdaus Surbakti / Beidar Sinabung

Sinabung - photo F. Surbakti 08.12.2020 / 08:50 WIB / via Beidar Sinabung

Sinabung - photo F. Surbakti 08.12.2020 / 08:50 WIB / via Beidar Sinabung

The impressive Sinabung dome on 08.12.2020 - photo Firdaus Surbakti / Beidar Sinabung

The impressive Sinabung dome on 08.12.2020 - photo Firdaus Surbakti / Beidar Sinabung

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
 Klyuchevskoy - strombolian and effusive explosive activity - photo Y? Demyanchuk 07.12.2020

Klyuchevskoy - strombolian and effusive explosive activity - photo Y? Demyanchuk 07.12.2020

The Klyuchevskoy group: from G. to D., the Bezymianny, the Kamen and the Klyuchevskaya Sopka - photo Y. Demyanchuk - Volkstat.ru 07.12.2020

The Klyuchevskoy group: from G. to D., the Bezymianny, the Kamen and the Klyuchevskaya Sopka - photo Y. Demyanchuk - Volkstat.ru 07.12.2020

Yuri Demyanchuk, of the Volcanological Observatory, reports that new magma arrived in the summit vent of Klyuchevskoy, filled the southern crater before overflowing and descending the southern flank for about 1,500 meters.

Strombolian activity generated a ash plume reaching 6,100-7,000 meters above sea level, before extending over 120 km NE of the volcano.

The thermal anomaly of December 7 is VRP 1.293 MW (Mirova)

A new flow began to be observed on the northern slope from 18:30 UTC.

 

Source: Y.Demyanchuk

Klyuchevskoy - thermal anomalies at 12/08/2020 / 11:05 am - Doc. Mirova Modis

Klyuchevskoy - thermal anomalies at 12/08/2020 / 11:05 am - Doc. Mirova Modis

Sabancaya - summary of activity between 30.11.2020 and 06.12.2020

Sabancaya - summary of activity between 30.11.2020 and 06.12.2020

Sabancaya - activity from 04.12.2020 - 6.15am-06.17am - Ingemet webcams - OVI - one click to enlargeSabancaya - activity from 04.12.2020 - 6.15am-06.17am - Ingemet webcams - OVI - one click to enlarge

Sabancaya - activity from 04.12.2020 - 6.15am-06.17am - Ingemet webcams - OVI - one click to enlarge

During the week of November 30 to December 6, 2020, the Sabancaya presented a decrease in activity compared to the previous week; an average of 26 explosions per day were recorded, accompanied by plumes of gas and ash reaching 2,000 meters in height.

Seismicity informs of 1,450 earthquakes during this week.

Seven thermal anomalies, between 1 and 23 MW, are recorded.

 

Source: I.G. Peru

Sabancaya - the activity continues ... 08.12.2020 / 10:48 - webcam Ingemmet-OVI

Sabancaya - the activity continues ... 08.12.2020 / 10:48 - webcam Ingemmet-OVI

Following the end of the eruption on 12/08/2020 at around 7.15 a.m. local time at Piton de La Fournaise, 21 volcano-tectonic earthquakes were recorded during the day of 12/08/2020 under the western edge of the Dolomieu crater, approximately 900 m above sea level (ie approximately 1,700 m below the surface), and already 6 today (between 0 a.m. and 5 a.m. UT, i.e. until 9 a.m. local time).

A possible resumption of inflation (swelling) of the building will be followed in the coming days.

The gas emissions in the air or in the ground have returned to pre-eruptive conditions, namely CO2 fluxes in the stable soil and SO2 emissions in the air at the level of the summit of the volcano below or near the threshold detection.

 

No photo this morning, the volcano is in the fog.

The Prefect of Reunion Island decided to switch to the safeguard phase of the specific ORSEC  system of the Piton de la Fournaise volcano on Tuesday, December 8, 2020. No hypothesis is ruled out for the moment as to the evolution of the situation in come, and the ban on access to the upper part of the enclosure remains in force until further notice pending the conclusions of future reconnaissance.

 

Sources: OVPF & Préfecture de La Réunion.

Barren island - Sentinel-2 L1C bands images 12,11,4 from 06.12.2020 (above) and 11.11.2020 (below) - one click to enlarge
Barren island - Sentinel-2 L1C bands images 12,11,4 from 06.12.2020 (above) and 11.11.2020 (below) - one click to enlarge

Barren island - Sentinel-2 L1C bands images 12,11,4 from 06.12.2020 (above) and 11.11.2020 (below) - one click to enlarge

The VAAC Darwin issued an ash scatter advisory for Barren Island, in the Andaman Islands, at a flight altitude of 60 (approx. 1,800 m. Alt.) Moving towards the OSO.

The aviation code is orange.

The last active period dates back to mid-November, when thermal anomalies were spotted.

 

BarrenIsland - radiative power - Doc.Mirova_MODIS_VRP 10.11.2020 / 08.12.2020

 

Sources: VAAC Darwin, Sentinel-2 and Mirova.

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