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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

The Semeru presented in this first half of April gas emissions with a gray-white plume at 200-400 meters above the crater Jonggring Seloko, interspersed by eruptions, with gray plumes at 400-600 meters above the summit .

On April 16 at 9:04 a.m. local time, an eruption was reported with an ash plume at 4,076 meters asl, according to a ground observer.

This April 17 at 06:08 WIB, Dr. Devy Kamil Syahbana reports a pyroclastic flow traveling 2,000 meters south, with an imprint on the seismogram of 7 mm amplitude and a duration of 481 sec.

Seismology is further characterized by 2 eruption earthquakes with a magnitude of 10-11 mm and a duration of 25-85 sec., An avalanche earthquake with an amplitude of 2 mm and a duration of 60 sec. ., and 14 blast earthquakes, of 2-5 mm amplitude and of a duration of 50-56 sec.

Semeru - pyroclastic flow from April 17 at 06:08 WIB - photo Magma Indonesia / Dr. Syahbana

Semeru - pyroclastic flow from April 17 at 06:08 WIB - photo Magma Indonesia / Dr. Syahbana

The eruptive activity and the continuous gas bursts in the crater of Jonggring Seloko of G. Semeru shows that there is a supply or a pressure of magma accompanied by an increase of fluid (gas, liquid and solids) to a depth weaker. The appearance of harmonic tremors without accompanying volcanic earthquakes (shallow volcanic or deep volcanic) indicates that the system is now open. The gray color in the eruption column indicates the presence of rocky materials brought to the surface. The intervals of seismic eruption are quite dense shows that so far, there has been no accumulation of energy having the potential of eruptions with greater intensity.

 

Sources: PVMBG, Magma Indonesia & Dr. Devy Kamil Syahbana

Anak Krakatau - Thermal anomalies on 17.04.2020 / 03.45 am - Doc. Mirova_MODIS_Latest10NTI

Anak Krakatau - Thermal anomalies on 17.04.2020 / 03.45 am - Doc. Mirova_MODIS_Latest10NTI

The activity of Anak Krakatau continues.

Magma Indonesia reports an eruption on April 16 at 2:47 p.m. local (07:47 UTC). The height of the plume could not be observed.

VAAC Darwin issued an orange VONA, following continuous ash emissions.

A new eruption is reported this Friday April 17, 2020 at 07:49 am IWST. No visual observation of the eruption could be made. This eruption was recorded on a seismograph with a maximum amplitude of 40 mm and a duration of 50 seconds.

Mirova has reported thermal anomalies between 11 MW and 60 MW in the past 4 days.

Alert levels remain constant.

 

Sources: PVMBG, Magma Indonesia, VAAC Darwin, Mirova

Anak Krakatau - seismogram of 16.04.2020 - Doc. Magma Indonesia

Anak Krakatau - seismogram of 16.04.2020 - Doc. Magma Indonesia

Anak Krakatau - activity of April 17, 2020 / 07:49 a.m. - PVMBG webcam

Anak Krakatau - activity of April 17, 2020 / 07:49 a.m. - PVMBG webcam

In Nevado del Ruiz, Colombia, seismicity related to fluid dynamics, inside volcanic conduits, showed an increase in the number of events and the seismic energy released, during the week of 6 to April 13.

The seismicity generated by the fracturing of the rocks presented a slight decrease in the number of earthquakes and increase in the seismic energy released, compared to the previous week. This kind of seismicity was located mainly in the Arenas crater and in the south-southwest, northwest and northeast sectors of the volcano, at depths varying between 0.3 and 6.3 km.

The occurrence of several seismic events of the drum-beat type, associated with fracturing of rocks were recorded on April 9, 10 and 12.

Small gas and ash emissions have been confirmed by cameras and reports from officials in Los Nevados National Natural Park, as well as by the VAAC Washigton VAAC, with a plume of gas and vapor reaching max. 1,300m above the summit on April 9.

The deformation of the volcanic surface, measured from GNSS stations (Satellite System of Global Navigation), showed no significant change

By monitoring the information provided on Mirova and NASA, low energy thermal anomalies at the volcano over the past week.

The alert remains at 3, Amarillo / Change in behavior of volcanic activity.

 

Source: S.G.C.
 

Nevado del Ruiz - photo weekly bulletin of the SGC 14.04.2020

Nevado del Ruiz - photo weekly bulletin of the SGC 14.04.2020

In Nevado del Huila, a total of 353 seismic events were recorded during the week of April 6 to 13, of which 188 were related to rock fracturing processes (VT type) and 165 to fluid dynamics in conduits volcanic.

The images obtained during the week by the webcams of Caloto, Tafxnú, Maravillas and La Palma showed a weak degassing of the volcanic system, while the sensors for monitoring the deformation of the ground, magnetic fields and infrasonic waves do not have not recorded variations associated with changes in volcanic activity. The alert remains at 3.

 

Source: SGC weekly report.

Nevado del Huila - photo in weekly bulletin from the SGC 14.04.2020

Nevado del Huila - photo in weekly bulletin from the SGC 14.04.2020

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
 Stromboli - 15.04.2020 / 07h22 - visible webcam & therm / INGV OE
 Stromboli - 15.04.2020 / 07h22 - visible webcam & therm / INGV OE

Stromboli - 15.04.2020 / 07h22 - visible webcam & therm / INGV OE

A new lava overflow occurred at Stromboli.

On April 14, at 4:12 UYC, the LGS surveillance network recorded a deflation of the ground, presenting all the typical characteristics of the lava overflows recorded in 2014 and March 31, 2020. The webcams do not corroborate the effusion, which is most likely intracratric, and concerns small volumes.

The INGV OE reports on April 15 from 7:16 UTC a lava overflow from the north crater of the Stromboli terrace. Glowing blocks detach from the lava front and roll into the Sciara del Fuoco. A VLP seismic signal is observed and reported by the LGS, comparable in amplitude and frequency to the signal recorded on March 31 which accompanied a small lava overflow. The signal is associated with a fall of blocks of approximately 20 minutes (7:16 a.m. - 8:00 a.m. UTC).

The depth of the VLP seismic source is compatible with a magmatic column which has been very shallow for weeks. The VLP seismic signals remain at very high values. Explosive activity at the NE crater, increased over the past week, has rapidly decreased overnight, starting at 23:00 UTC yesterday.

The thermal anomalies of April 14 are between VRP 10 and 14 MW, those of April 15, between 21 and 73 MW.

 

Sources: L.G.S. , Mirova, INGV OE and INGVvulcani.

Stromboli - 15.04.2020 / 7:50 am Visible webcam - & 7:44 am thermal webcam - Doc INGV OE
Stromboli - 15.04.2020 / 7:50 am Visible webcam - & 7:44 am thermal webcam - Doc INGV OE

Stromboli - 15.04.2020 / 7:50 am Visible webcam - & 7:44 am thermal webcam - Doc INGV OE

Stromboli - 15.04.2020 / 7h28 - LGS webcam

Stromboli - 15.04.2020 / 7h28 - LGS webcam

Stromboli - seismogram 15.04.2020 / with the episode at 7.28 am (red) - Seismic-acoustic network signal / LGS

Stromboli - seismogram 15.04.2020 / with the episode at 7.28 am (red) - Seismic-acoustic network signal / LGS

Stromboli - thermal anomalies on 15-16.04.2020 - Doc. Mirova & LGS - one click to enlargeStromboli - thermal anomalies on 15-16.04.2020 - Doc. Mirova & LGS - one click to enlarge

Stromboli - thermal anomalies on 15-16.04.2020 - Doc. Mirova & LGS - one click to enlarge

At Kuchinoerabujima, in the Ryukyu Islands, currently on level 3 alert, activity continues, with the emission of a white-gray plume on April 16 at around 3 p.m. local, according to the JMA. The activity is in progress.

 

Sources: JMA & VAAC Tokyo.

Kuchinoerabujima -14.04.2020 / 5:55 pm - Doc. JMA

Kuchinoerabujima -14.04.2020 / 5:55 pm - Doc. JMA

 Kuchinoerabujima -16.04.2020 / 2:14 p.m. - Doc. JMA

Kuchinoerabujima -16.04.2020 / 2:14 p.m. - Doc. JMA

Whakaari / White Island remains in a high state of turmoil according to the latest GeoNet report of April 16. No significant change in the quantity of volcanic gas emitted or of seismic activity was recorded in March-April. The volcanic alert level remains at level 2; The aviation color code remains yellow.

Whakaari / White Island - 04.16.2020 - doc. GeoNet

Whakaari / White Island - 04.16.2020 - doc. GeoNet

"During the lockdown (COVID-19 level 4), we continued to monitor Whakaari / White Island with the instrumentation which automatically sends us data. This is mainly data from seismic and SO2 sensors, and images from our web cameras. Over the weekend, there were public reports of increased vapor emissions, but we can confirm that there were no eruptions; just the weather allowed people to see the plume of volcanic gas better. We have not done any other aerial measurements and observations of the volcano in the past three weeks.

Gas data transmitted remotely from sensors does not suggest any significant change in SO2 production from what we saw in March. Emission rates for other gases have not been measured in the past few weeks as we have reduced non-essential field visits during the COVID-19 lockdown. Seismic activity remains at lower levels and continues to fluctuate over periods of several hours or days.

Although web cameras are still partially covered by the ash from the December eruption and need cleaning, the recent rain has helped. The layout of the active vent zones seems to have been practically unchanged since the beginning of March. We continue to see evidence of high temperatures at night, but no change in the locations of these heat sources is apparent.

The active area remains a dynamic environment and an eruption could occur with few warning signs. "  (Report of 04.16.2020 - GeoNet)

 

Source: GeoNet

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
Klyuchevskoy - activity of 14.04.2020 seen by Sentinel-2 / A.Vecoli - one click to enlarge

Klyuchevskoy - activity of 14.04.2020 seen by Sentinel-2 / A.Vecoli - one click to enlarge

The moderate explosive eruption continues at Klyuchevskoy, with this April 15 an explosion of ashes and a plume observed at 5,500-6,000 meters asl., extending for 65 km towards the northeast, then to a larger east sector.

The aviation code remains orange, because of possible other explosions that may affect aviation at low altitude.

 

Sources: KVERT, VAAC Tokyo and Sentinel-2

Klyuchevskoy - thermal anomalies on 15.04.2020 / 0h25 / Mirova and Volcanic ash advisory for 15.04.2020 / VAAC Tokyo - one click to enlarge
Klyuchevskoy - thermal anomalies on 15.04.2020 / 0h25 / Mirova and Volcanic ash advisory for 15.04.2020 / VAAC Tokyo - one click to enlarge

Klyuchevskoy - thermal anomalies on 15.04.2020 / 0h25 / Mirova and Volcanic ash advisory for 15.04.2020 / VAAC Tokyo - one click to enlarge

Klyuchevskoy - 15.04.2020 / 6:14 am - IVS FEB RAS KVERT webcam

Klyuchevskoy - 15.04.2020 / 6:14 am - IVS FEB RAS KVERT webcam

The strombolian and intracrateric effusive activity continued at Etna, between April 6 and 12 from the Voragine crater. Strong degassing of the new southeast crater and the northeast crater was noticed during the same period.

The activity inside the Voragine crater, in progress for 7 months, continued with slight fluctuations. This activity consists of three-mouthed Strombolian explosions, which build slag cones in the crater and an effusive activity, mainly from a mouth located on the south side of the largest cone. The explosive activity was more continuous at the largest cone, formed as the first, from September 12, 2019.

Etna - The summit craters during the inspection on April 10. a) The complex of ash cones inside the Voragine crater, the figures give the chronological order of formation of the respective mouths: 1 = September 12, 2019 (1a indicates the effusive mouth on the side of the cone); 2 = February 29, 2020; 3 = March 9, 2020. (b) Explosion on the largest of the Voragine intracratial cones. c) Interior of the northeast crater with internal degassing mouth (photo by Francesco Ciancitto, INGV-OE).

Etna - The summit craters during the inspection on April 10. a) The complex of ash cones inside the Voragine crater, the figures give the chronological order of formation of the respective mouths: 1 = September 12, 2019 (1a indicates the effusive mouth on the side of the cone); 2 = February 29, 2020; 3 = March 9, 2020. (b) Explosion on the largest of the Voragine intracratial cones. c) Interior of the northeast crater with internal degassing mouth (photo by Francesco Ciancitto, INGV-OE).

On April 9 and 10, large explosions widened the mouth. (documented in the linked article). From April 11 to 12, the explosions produced small bursts of ash that quickly dispersed into the atmosphere in the immediate vicinity of the summit craters.

Note that the L.G.S. Has experienced a rapid increase in infrasonic activity, associated with an increase in seismic tremor on April 14; this situation led to a very high level of alert EW1 / explosive activity, communicated by SMS and email.

 

Sources: INGV OE & Laboratorio Geofisica Sperimentale

Etna 14.04.2020 -increased infrasonic activity - Doc. LGS

Etna 14.04.2020 -increased infrasonic activity - Doc. LGS

In its daily bulletin, the Volcanological Observatory of Piton de la Fournaise noted in its bulletin of April 14, 2020, a resumption of inflation (swelling) in the summit area.

The GPS of the summit area recorded an inflation, witnessing the pressurization of a surface and deep source ... For two days, a resumption of inflation and a significant presence of CO2 were noted. This means that the magma is still present and going up.

At the end of each eruption in 2018 and 2019, a repetition of this sequence was observed; it leaves a probability of a new eruption in the medium term.

 

Source: OVPF

Piton de La Fournaise - Illustration of the deformation over 2 months, between 15.02 and 15.04.2020. Here are represented baselines (variation in distance between two GPS receivers) crossing the Piton de la Fournaise building, at the top (top), at the base of the terminal cone (in the middle) and in the far field (bottom ) (see location on associated maps). An increase is synonymous with elongation and therefore swelling of the volcano; conversely, a decrease is synonymous with contraction and therefore deflation of the volcano. Any periods colored in light pink correspond to eruptions. - Doc. OVPF

Piton de La Fournaise - Illustration of the deformation over 2 months, between 15.02 and 15.04.2020. Here are represented baselines (variation in distance between two GPS receivers) crossing the Piton de la Fournaise building, at the top (top), at the base of the terminal cone (in the middle) and in the far field (bottom ) (see location on associated maps). An increase is synonymous with elongation and therefore swelling of the volcano; conversely, a decrease is synonymous with contraction and therefore deflation of the volcano. Any periods colored in light pink correspond to eruptions. - Doc. OVPF

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
Popocatépetl - 04.13.2020 / 11:26 p.m. - WebcamsdeMexico

Popocatépetl - 04.13.2020 / 11:26 p.m. - WebcamsdeMexico

The Popocatépetl presented an explosion on April 13 at 11:16 p.m., which was accompanied by the expulsion of incandescent fragments on the flanks of the volcano, and a plume of gas and ash at a height of 1,500 meters, dispersing to the north-east.

The alert level remains at amarillo Fase 2.

 

Sources: Cenapred & webcamsdeMexico

Rincon de La vieja - screenshot of a video from 07.04.2020 Ovsicori archives

Rincon de La vieja - screenshot of a video from 07.04.2020 Ovsicori archives

A small hydrothermal explosion occurred on April 13 at 2:51 a.m. local in Rincon de La Vieja, Costa Rica. The observation of a degassing plume rising to 500 meters is reported by the Ovsicori.

Seismicity is characterized by a large tremor of variable amplitude, and occasionally earthquakes of low frequency and low amplitude.

No significant deformation of the volcano is recorded.

 

Source: Ovsicori

Anak Krakatau - Sentinel 2 image + data Landsat 8 / USGS - Doc. Pierre Markuse - one click to enlarge

Anak Krakatau - Sentinel 2 image + data Landsat 8 / USGS - Doc. Pierre Markuse - one click to enlarge

At Anak Krakatau, the Citra satellite revealed continuous thermal anomalies on April 11, 12 and 13. A Sentinel 2 / Landsat 8 image shows a hot spot on April 13. The Mirova site also mentions this on these dates.

The PVMBG reports the seismicity level for this April 14 in the first part of the day:

- an eruption earthquake with an amplitude of 35 mm and a duration of 38 sec.

- a low frequency earthquake lasting 8 sec. 2 mm amplitude

- and the continuous tremor of dominant at 1 mm.

The alert remains at 2 / waspada, accompanied by the recommendation not to approach within a radius of 2 km.

 

Sources: PVMBG, Magma Indonesia, Sentinel-2 and Pierre Markuse.

Anak Krakatau - thermal anomalies on April 14, 2020 / 3:15 am - Doc. Mirova
Anak Krakatau - thermal anomalies on April 14, 2020 / 3:15 am - Doc. Mirova

Anak Krakatau - thermal anomalies on April 14, 2020 / 3:15 am - Doc. Mirova

In Karangetang, in the North Sulawezi area, the visibility of the volcano makes it possible to see fine white plumes 50-200 meters above the summit.

The PVMBG reports for this April 13 : 8 blast earthquakes with an amplitude between 4 and 10 mm and a duration between 15 and 21 sec. 

At midday on April 14, two blast earthquakes between 4 and 6 mm and between 16 and 21 sec were recorded.

The activity level remains at 3 / siaga, with a prohibited area of ​​between 2 and 4 km. according to the slopes.

 

Sources: PVMBG, Magma Indonesia, Sentinel-2

Karangetang - 13.04.2020 - hot spots at the 2 summit craters - image Sentinel-2 bands 12,11,4 - one click to enlarge

Karangetang - 13.04.2020 - hot spots at the 2 summit craters - image Sentinel-2 bands 12,11,4 - one click to enlarge

Karangetang - 14.04.2020 / 05h41 Wita - Doc. PVMBG

Karangetang - 14.04.2020 / 05h41 Wita - Doc. PVMBG

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Publié le par Bernard Duyck
Publié dans : #volcanic activity

April 12, 2020, ~ Series of Explosions ~ Volcan de Fuego, Guatemala The time for the explosions are 02:42, 02:56, 03:55, 04:12, 04:30. Fuego is at a heightened activity level.

In Fuego, Guatemala, the beginning of the day on April 12 was marked by 4 strong explosions, with expulsion of incandescent materials on the flanks of the volcano, respectively at 2:42, 2:56, 3:55 and 4:12

Today, the sector is cloudy and the atmosphere is warm, disturbed by sounds in a train locomotive, and moderate fallout; a lava flow of 200 meters wide follows the barranca Ceniza.

Many thermal anomalies are reported by Mirova (see below)

 

Sources: RSN / William Chigna & Crelosa.com

Fuego - thermal anomalies on April 12 / Mirova and seismogram of 12-13.04.2020 / Conred - one click to enlarge
Fuego - thermal anomalies on April 12 / Mirova and seismogram of 12-13.04.2020 / Conred - one click to enlarge

Fuego - thermal anomalies on April 12 / Mirova and seismogram of 12-13.04.2020 / Conred - one click to enlarge

An eruption was observed on the webcams this April 12 around 9:40 pm in Turrialba, Costa Rica; the pictures are not very good, but illustrate a plume of ash and gas well loaded.

Update by RSN 18:36: Yesterday April 12, at 20:30 hours, the Turrialba volcano presented a small degassing pulse in the active crater. The activity consisted of leaving steam and other gases. Because the weather conditions at the summit at that time were clear and there was some light on the moon, it was observed in the volcanic surveillance cameras of the RSN, a plume of about 500 meters from height with direction to northwest. The gas and water vapor outlet continued until 9:40 p.m. Among the gases emitted during this type of activity, sulfur dioxide (SO2), the smell of sulfur of which was perceived by the local population.

During the emanation, no seismic sign was recorded during the emanation. However, LP (long period) type event signals are observed in the daily register.

 

Sources: Rodolfo van der Laat / Tempo CR and Teresa Lopez - Update RSN

Turrialba - 12.04.2020 / 9:40 p.m. - RSN webcam

Turrialba - 12.04.2020 / 9:40 p.m. - RSN webcam

In Chile, two low energy explosions were recorded at the Nevados de Chillan complex on 12 April 2020.

They were accompanied by ash plumes, respectively at 2,300 m. and 1,800 m. high, displaced by the winds towards the south-east.

The technical alert remains in Amarilla.

 

Source: Sernageomin OVDAS

Nevados de Chillan - one of the explosions on April 12/2 p.m. - photo Sernageomin

Nevados de Chillan - one of the explosions on April 12/2 p.m. - photo Sernageomin

The VAAC Darwin relates continuous emissions of gases (sulfur dioxide), vapors and a little ash to the Anak Krakatau this April 12, at a flight altitude of 100, evolving towards the northwest; the aviation code remains at Red.

The PVMBG reports 5 blast earthquakes on April 12 and one blast earthquake in the morning of April 13; as well as 4 episodes of tremor of dominant amplitude at 1 mm on April 12.

The activity level remains at 2 / waspada.

 

Sources: PVMBG, Magma Indonesia, VAAC Darwin, Sentinel-2

Anak Krakatau - 12.04.2020 - Sentinel-2 L1C image bands 12,11,4 - one click to enlarge

Anak Krakatau - 12.04.2020 - Sentinel-2 L1C image bands 12,11,4 - one click to enlarge

Anak Krakatau - 12.04.2020 - seismogram of 12.04.2020 - Doc. Maha Indonesia

Anak Krakatau - 12.04.2020 - seismogram of 12.04.2020 - Doc. Maha Indonesia

Anak Krakatau - plume of steam and gas from 13.04.2020 / 12:01 WIB - Doc.Magma Indonesia

Anak Krakatau - plume of steam and gas from 13.04.2020 / 12:01 WIB - Doc.Magma Indonesia

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Publié le par Bernard Duyck
Publié dans : #volcanic activity

A thought for Norbert Choisi, head of the Ile-de-France delegation of the European Volcanological Association. This passionate volcanophile, frequent traveler, died after a fight against the Covid-19.

We offer our condolences to his family and many friends.
 

Klyuchevskoy - 12.04.2020 / 6:32 am - Seen from F.Yu. Levinson-Lessing Kamchatkan Volcanological Station / Klyuchi village - photo IVS FEB RAS KVERT

Klyuchevskoy - 12.04.2020 / 6:32 am - Seen from F.Yu. Levinson-Lessing Kamchatkan Volcanological Station / Klyuchi village - photo IVS FEB RAS KVERT

A moderate explosive activity still animates the Klyuchevskoy, this April 11 and 12, 2020.

Yesterday, a plume was observed at 5,500-6,000 meters asl. before extending south of the volcano for 200 km.

The aviation code is orange, reflecting the continuation of the activity; other ash explosions can occur at any time.

 

Sources: KVERT & VAAC Tokyo

Klyuchevskoy - Volcanic ash advisory for this 12.04.2020 - Doc. VAAC Tokyo

Klyuchevskoy - Volcanic ash advisory for this 12.04.2020 - Doc. VAAC Tokyo

The activity at three of the four summit craters of Etna continues, although slightly decreased compared to the last weeks. This activity consists of Strombolian explosions and emission of an intracratric lava flow with Voragine (VOR), an intense and very noisy degassing in the Northeast Crater (NEC), and a fluctuating incandescence with a strong degassing in the "cone of the saddle "from the New Southeast Crater (NSEC).

 

Sources: INGVviulcani & Boris Behncke

 Etna VOR - 10.04.2020 - photo Francesco Ciancitto - INGV OE / INGVvulcani

 Etna VOR - 10.04.2020 - photo Francesco Ciancitto - INGV OE / INGVvulcani

 Etna NEC - 10.04.2020 - photo Francesco Ciancitto - INGV OE / INGVvulcani

 Etna NEC - 10.04.2020 - photo Francesco Ciancitto - INGV OE / INGVvulcani

In the Reykjanes peninsula, seismic swarms continue.

This April 11 at 9:55 am, an earthquake of Magnitude 3.2 occurred 4.6 km northwest of Grindavik, preceded by another of M2.8 at 9:32, both felt in Grindavik.

Seismicity remains continuous in the Reykjanes peninsula, probably according to the IMO following three magmatic intrusions as reported on April 3. (http://www.earth-of-fire.com/2020/04 / activity-of-la-fournaise-chaiten-and-an-update-on-magmatic-intrusions-in-the-reykjanes-peninsula.html)

Source: IMO

Reykjanes Peninsula- 11.04.2020. / 3:40 pm - location and magnitude of earthquakes - Doc. IMO
Reykjanes Peninsula- 11.04.2020. / 3:40 pm - location and magnitude of earthquakes - Doc. IMO
Reykjanes Peninsula- 11.04.2020. / 3:40 pm - location and magnitude of earthquakes - Doc. IMO

Reykjanes Peninsula- 11.04.2020. / 3:40 pm - location and magnitude of earthquakes - Doc. IMO

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A strong magmatic eruption occurred at G. Anak Krakatau on Friday April 10, 2020 from 10:35 p.m. western Indonesia time, the height of the dark ash column being observed ± 500 m above the summit ( ± 500 m above sea level).

In a first report, the PVMBG reports its recording on a seismograph with a maximum amplitude of 40 mm and a duration of 2284 seconds.

The local webcam showed images from 10:35 p.m. on April 10 until the early hours of April 11. The observatory's webcam, located 43 km on the coast, shows significant fountaining.

Anak Krakatau - 10.04.2020 / 22h59 - PVMBG webcam

Anak Krakatau - 10.04.2020 / 22h59 - PVMBG webcam

Anak Krakatau - seismogram of 10-11.04.2020 - Doc. Magma Indonesia

Anak Krakatau - seismogram of 10-11.04.2020 - Doc. Magma Indonesia

Anak Krakatau - 04.10.2020 / sequence from 11:16 p.m. to 11:31 p.m. - PVMBG webcam
Anak Krakatau - 04.10.2020 / sequence from 11:16 p.m. to 11:31 p.m. - PVMBG webcam
Anak Krakatau - 04.10.2020 / sequence from 11:16 p.m. to 11:31 p.m. - PVMBG webcam

Anak Krakatau - 04.10.2020 / sequence from 11:16 p.m. to 11:31 p.m. - PVMBG webcam

Anak Krakatau - 10.04.2020 / sequence from 11.38pm to 11.46pm - PVMBG webcam
Anak Krakatau - 10.04.2020 / sequence from 11.38pm to 11.46pm - PVMBG webcam
Anak Krakatau - 10.04.2020 / sequence from 11.38pm to 11.46pm - PVMBG webcam

Anak Krakatau - 10.04.2020 / sequence from 11.38pm to 11.46pm - PVMBG webcam

Anak Krakatau - eruption 10.04.2020 - Doc. Statusku WA

According to VAAC Darwin, which issued a red aviation code, the plume of ash and sulfur dioxide has reached an altitude of 15 km, moving west northwest. The satellites have registered a strong hot spot.

On April 11, two brief eruptions occurred, according to Dr. Devy Syahbana, and since 9:26 am WIB, a significant decrease in activity was visible on the seismogram.

NB: on social networks, many images do NOT illustrate this eruptive phase of April 10-11, 2020.

 

The activity level is always at 2 / waspada, with an unauthorized area of ​​2 km radius around the crater.

It is the strongest eruptive phase since the phreatomagmatic activity of December 22, 2018, and the partial collapse of the cone responsible for the deadly tsunami.

 

Sources: Magma Indonesia, PVMBG, VAAC Darwin

Anak Krakatau - 11.04.2020 / 00:03 - lava fountains - Magma Indonesia webcam on the coast at 43 km.

Anak Krakatau - 11.04.2020 / 00:03 - lava fountains - Magma Indonesia webcam on the coast at 43 km.

Anak Krakatau - 04.11.2020 / 12:17 am - PVMBG webcam

Anak Krakatau - 04.11.2020 / 12:17 am - PVMBG webcam

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3rd International Unofficial Day of Volcanoes; Activity of Merapi and La Fournaise.

It's the 3rd International Unofficial International Day of Volcanoes . Today, April 10 (Tambora's birthday), we celebrate volcanoes and promote awareness of volcanic disasters on social media.

Merapi - eruption this 10.04.2020 / 9:15 a.m. WIB - photo BPPTKG- one click to enlarge

Merapi - eruption this 10.04.2020 / 9:15 a.m. WIB - photo BPPTKG- one click to enlarge

There was an eruption at Merapi this April 10, 2020 at 09:10 WIB., Recorded on a seismogram with an amplitude of 75 mm and a duration of 103 seconds. The height of the eruption column was observed ± 3000 meters from the summit. The direction of the wind when it blows northwest.

Merapi - the summit of the volcano this 10.04.2020 / 9h20 WIB - photoVolcano YT i Frekom

Merapi - the summit of the volcano this 10.04.2020 / 9h20 WIB - photoVolcano YT i Frekom

Merapi - seismogram of 09-10.04.2020 - / hour UTC - Doc. Magma Indonesia

Merapi - seismogram of 09-10.04.2020 - / hour UTC - Doc. Magma Indonesia

In addition, between 12 a.m. and 12 p.m., Magma Indonesia provides information on seismicity:

- 12 blast earthquakes with an amplitude of 2-20 mm, and the duration of the earthquake 14.76-59.88 seconds.

- 8 low frequency earthquakes with an amplitude of 2 to 45 mm and an earthquake duration of 16.68 to 59.36 seconds.

- 3 Hybrid earthquakes, with an amplitude of 2 mm, S-P 0.4-0.6 seconds and an earthquake duration of 7.2-8.16 seconds.

- 3 local tectonic earthquakes with an amplitude of 2-35 mm, S-P 2.12-2.21 seconds and an earthquake duration of 23.88-40.24 seconds.

 

The activity level of the Merapi remains at 2 / waspada, with an area of ​​3 km radius from the summit without human activity.

 

Sources: BPPTKG and Magma Indonesia

Merapi - eruptive plume of 10.04.2020 - photos AlfanL / Twitter and Meccom.id / Twitter - one click to enlarge.Merapi - eruptive plume of 10.04.2020 - photos AlfanL / Twitter and Meccom.id / Twitter - one click to enlarge.

Merapi - eruptive plume of 10.04.2020 - photos AlfanL / Twitter and Meccom.id / Twitter - one click to enlarge.

The OVPF was on the field this April 9, 2020 for a double mission on Piton de la Fournaise.

Mission 1: repair of a monitoring station and cleaning of the solar panels covered by Pélé's hair and the slag from the last eruption in order to ensure operational surveillance.

Piton de La Fournaise - 09.04.2020 - Mission 1 OVPF repair and cleaning of stations after the last eruption - Doc. OVPF / Facebook

Piton de La Fournaise - 09.04.2020 - Mission 1 OVPF repair and cleaning of stations after the last eruption - Doc. OVPF / Facebook

Mission 2: recognition of the site of the April 2-6 eruption and fault diagnosis at one of our stations.

The eastern flank is unrecognizable !

The diagnosis on our station was quickly observed, covered by a flow and a thickness of slag following the opening of a crack at less than 20m at the end of the eruption. Only part of the antenna emerges.
The landscape allows you to see the intensity of the end of the eruption with fallout of slag within a radius of 500m and slag found up to the top. Fortunately in view of the activity recorded on the instruments of the surveillance network, the OVPF had canceled its mission on 6/4 in the morning and no one was on site during this phase of climax.

 

Source: OVPF

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

Piton de La Fournaise - 09.04.2020 - Mission 2 OVPF reconnaissance of the site of the eruption of 2-6 April and fault diagnosis on one of our stations. - Photo OVPF / Facebook - one click to enlarge

Piton de La Fournaise - 09.04.2020 - Mission 2 OVPF reconnaissance of the site of the eruption of 2-6 April and fault diagnosis on one of our stations. - Photo OVPF / Facebook - one click to enlarge

Piton de La Fournaise - 09.04.2020 - Misson 2 OVPF - The FER monitoring station of the OVPF. Before (right) - After (left) - Photo OVPF / Facebook

Piton de La Fournaise - 09.04.2020 - Misson 2 OVPF - The FER monitoring station of the OVPF. Before (right) - After (left) - Photo OVPF / Facebook

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
Nevados deChillan - explosion of 08.04.220 / 21h54 - Sernageomin webcam Portezuelo

Nevados deChillan - explosion of 08.04.220 / 21h54 - Sernageomin webcam Portezuelo

Nevados deChillan - explosion of 08.04.220 / 21h58 - Sernageomin webcam Portezuelo

Nevados deChillan - explosion of 08.04.220 / 21h58 - Sernageomin webcam Portezuelo

This April 8 at 17:54 local / 21:54 UTC an earthquake LP, associated with the dynamics of internal fluids, was recorded at Nevados de Chillan, at a depth of 0.4 km.

An energetic explosion was associated with a plume of gas and ash rising to 3,700 meters above the point of emission, before drifting south. Basal pyroclastic flows were observed mainly in the north, northeast and southeast sectors.

Mirova recorded two thermal anomalies, respectively on April 8 at 6:10 am, from VRP 27 MW, and on April 9 at 3:35 am, from VRP 4 MW.

The technical alert remains in Amarilla. The potential impact zone is maintained at a radius of 2km around the active crater.

 

Source: Sernageomin

Fuego - incandescence and lava flow in the Ceniza barranca - photo 07.04.2020 Luis Lopez via W. Chigna / Twitter

Fuego - incandescence and lava flow in the Ceniza barranca - photo 07.04.2020 Luis Lopez via W. Chigna / Twitter

The Fuego, in Guatemala, presented this April 8 weak to moderate explosions, 10 to 14 per hour, accompanied by gray plumes at 4,500-4,800 meters asl. scattered west and southwest, as well as incandescent pulses 300-400 meters high and avalanches in the vicinity of the crater, and the various drainages.

Fuego - radiance of the lava flow - special bulletin of 08.04.2020

A change in Fuego's activity since April 6 is reported by the Government in a special bulletin on April 8 at 9 p.m. local, following the change in seismicity: the activity has now become effusive, and forms a flow of lava 400 meters long towards the Ceniza barranca. There is an almost constant glow at the crater and avalanches up to 1 km. reaching the vegetation.

The current activity is similar to that recorded from March 16, 2020, which lasted 8 days.

The thermal anomalies reported by Mirova are between VRP 11 MW and VRP 150 MW in recent days

 

Sources: Gobierno de Guatemala, Insivumeh, Conred & Mirova

 Fuego - thermal anomalies on 09.04.2020 / 03h50 - Doc. Mirova_MODIS_Latest10NTI

Fuego - thermal anomalies on 09.04.2020 / 03h50 - Doc. Mirova_MODIS_Latest10NTI

In Kamchatka, the Sheveluch and the Klyuchevskoy continue their activity, both with an orange aviation code.

The KVERT reports this April 9 an explosion of ashes, with a plume at 4,000-5,000 meters asl., in Sheveluch, drifting 230 km towards the southeast of the volcano.

The aviation code remains orange due to ash explosions with plume of up to 10 to 15 km asl., And disrupt local and international flights.

 

Sources: KVERT & VAAC Tokyo

 Sheveluch - Volcanic ash advisory of 09.04.2020 - Doc. VAAC Tokyo

Sheveluch - Volcanic ash advisory of 09.04.2020 - Doc. VAAC Tokyo

The Mayon Volcano seismic monitoring network recorded two (2) volcanic earthquakes and one (1) rockfall event during the 24-hour observation period, as of April 8. Moderate emissions of vapor-laden white plumes that crept downstream before drifting west-southwest, northeast, and north-northwest were observed.

This April 9, moderate emissions of white plumes loaded with vapor, are reported from a height of 400 meters, before drifting to the northwest and west-northwest.

A faint glow at the summit crater could be observed at night. Sulfur dioxide (SO2) emissions were measured at an average of 339 tonnes / day on April 07, 2020. Recent electronic tilt data showed inflation of the middle to upper parts of the volcanic edifice that began in last quarter of 2019. This follows a trend inflation that started in February 2019 as recorded by continuous GPS monitoring.

DOST-PHIVOLCS reiterates that the alert level 2 currently prevails on Mayon because the volcano is at a moderate level of agitation. It is therefore strongly recommended that entry into the permanent danger zone or PDZ with a radius of six kilometers and an extended danger zone or precautionary EDZ with a radius of seven kilometers in the south-southwest sector to east-north- is, extending from Anoling, Camalig to Sta. Misericordia, Sto. Domingo must be strictly prohibited.

 

Source: Phivolcs

Mayon - incandescence at the summit crater - photo archive Dost-Phivolcs 04.02.2020 / 19h

Mayon - incandescence at the summit crater - photo archive Dost-Phivolcs 04.02.2020 / 19h

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
 Sakurajima - Sentinel-2 L1C image on 2020-04-06 bands 4,3,2 - one click to enlarge

 Sakurajima - Sentinel-2 L1C image on 2020-04-06 bands 4,3,2 - one click to enlarge

The past week  at Sakurajima (from April 2 to 6, 2020) the eruptive activity actively continued.

JMA reports up to 15 eruptions on April 4 at the Minamidake crater, with block ejections at 600-900 meters, and according to an alert bulletin, could reach up to 2 km., and plumes reaching 3,800 m. altitude.

Night glow is observed.

Seismicity is dominated by numerous volcanic earthquakes.

The inclinometers and extensometers indicate that the volcano is raised (inflation) and widened, signs of a continuous feeding.

 

Source: JMA 07.04.2020

Klyuchevskoy - 07.04.2020 / 2.30 p.m. - KVERT

Klyuchevskoy - 07.04.2020 / 2.30 p.m. - KVERT

In Kamchatka, the explosive activity of the Klyuchevskoy continues: moderate explosions, with ash plumes at 5,000-5,500 meters asl. are reported on April 6 and 7 by KVERT and VAAC Tokyo.

No lava flow is reported.

The aviation code remains orange.

 

Sources: KVERT & VAAC Tokyo

Merapi - 08.04.2020 / 7:17 am - Doc. Volcano YT i Frekom

Merapi - 08.04.2020 / 7:17 am - Doc. Volcano YT i Frekom

At Merapi, no explosions these days.

The PVMBG reports for the day of April 7:

7 avalanche earthquakes, 2 blast earthquakes, 18 hybrid earthquakes (on the rise), 7 tectonic earthquakes and 3 of low frequency.

Colorful fumaroles can be observed during the day.

The activity level remains at 2 / waspada.

 

Source: PVMBG, BPPTKG

Merapi - 07.04.2020 / 5h59 -  photo PGM Babadan  et résumé de l'activité entre 00h-24h WIB via PVMBG
Merapi - 07.04.2020 / 5h59 -  photo PGM Babadan  et résumé de l'activité entre 00h-24h WIB via PVMBG

Merapi - 07.04.2020 / 5h59 - photo PGM Babadan et résumé de l'activité entre 00h-24h WIB via PVMBG

As a bonus : Etna photographed on the night of April 7 to 8 by Boris Behncke from Tremestieri Etneo;

The snow-capped volcano is illuminated by the super moon, with glow at the Voragine crater and a dense plume of vapor at the new southeast crater.

 

Source: thanks to Boris Behncke for regularly sharing these images.

 Etna photographed on the night of April 7 to 8 by Boris Behncke from Tremestieri Etneo

 Etna photographed on the night of April 7 to 8 by Boris Behncke from Tremestieri Etneo

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