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Earth of fire

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

Publié le par Bernard Duyck
Publié dans : #volcanic activity
 Sinabung - 08.01.2021 / 6:11 p.m. - screenshot by PVMBG Magma Indonesia

 Sinabung - 08.01.2021 / 6:11 p.m. - screenshot by PVMBG Magma Indonesia

An eruptive episode marked the Sinabung on Friday January 8, 2021 at 6:09 p.m. WIB, accompanied by an ash plume observed at ± 700 m above the summit (± 3160 m above sea level) drifting north . This eruption was recorded on a seismograph with a maximum amplitude of 34 mm and a duration of 161 seconds.

Another episode occurred on Friday January 8, 2021 at 11:04 p.m. WIB. No visual rash was observed. This eruption was recorded on a seismograph with a maximum amplitude of 36 mm and a duration of 200 seconds.

Seismic observation of January 8, 2021:

- 2 eruption earthquakes with an amplitude of 34-36 mm and the duration of the earthquake of 161-200 seconds.

- 44 collapse / avalanche earthquakes with an amplitude of 2 to 50 mm and an earthquake duration of 20 to 145 seconds.

- 14 blast / emission earthquakes, with an amplitude of 2 to 60 mm, and the earthquake lasted 15 to 75 seconds.

- 5 low frequency earthquakes with an amplitude of 4 to 24 mm and the duration of the earthquake was 10 to 45 seconds.

- 14 hybrid / multiphase earthquakes, with an amplitude of 2-7 mm, S-P was not observed and the earthquake took 5-12 seconds.

- 1 local tectonic earthquake

- 6 distant tectonic earthquakes

Sinabung - seismicity at 01.08.2021 - eruption earthquakes (in red) have been more numerous since the end of December - doc. Magma indonesia - one click to enlarge

Sinabung - seismicity at 01.08.2021 - eruption earthquakes (in red) have been more numerous since the end of December - doc. Magma indonesia - one click to enlarge

Since 28,12,2020, the eruptions become more frequent.

On Saturday January 9, 2021, at 5:35 am WIB, PVMBG reports an eruption, accompanied by an ash plume observed at ± 1000 m above the summit (± 3460 m above sea level) dispersed to the north and the northeast. This eruption was recorded on a seismograph with a maximum amplitude of 70 mm and a duration of 118 seconds.

 

Sources: PVMBG, Magma Indonesia

Sinabung - 01.09.2021 / 5:46 am WIB - PVMBG webcam

Sinabung - 01.09.2021 / 5:46 am WIB - PVMBG webcam

A fall of glowing rocks on the southwest flank of Merapi volcano is observed at 11:32 p.m. local time on January 8.

At the seismicity level for this January 8, 2021, it is reported:

- 149 collapse / avalanche earthquakes, with an amplitude of 3-50 mm and a duration of 11.2-113 seconds from the earthquake.

- 36 blast / emission earthquakes, with an amplitude of 3 to 23 mm and the duration of the earthquake was 9.3 to 36.8 seconds.

- 199 hybrid / multiphase earthquakes with an amplitude of 3-30 mm, S-P 0.3-0.5 seconds and the duration of the earthquake was 4.7-11.2 seconds.

- 56 shallow volcanic earthquakes with an amplitude of 35 to 75 mm, and the duration of the earthquake was 11 to 44.5 seconds.

- 4 distant tectonic earthquakes, with an amplitude of 3-8 mm, S-P was not observed and the earthquake lasted 67.9-110.6 seconds.

Merapi - glowing rocks falling on  01/08/2021  11:35  p.m. - photo BPBD

Merapi - glowing rocks falling on 01/08/2021 11:35 p.m. - photo BPBD

A pyroclastic flow occurred on January 9, 2021 at 08:45 WIB at Merapi. The eruptive column was observed up to 200m high; the descent of the pyroclastic flow upstream of Kali Krasak was 600m, recorded on the seismogram with a max. 45 mm and a duration of 120 seconds.

 

Sources: PVMBG, Magma Indonesia

Merapi - 01.09.2021 / 8:46 am - photo via Sukiman Lintas Merapi

Merapi - 01.09.2021 / 8:46 am - photo via Sukiman Lintas Merapi

Merapi -09.01.2021 / 8:46 am - image Frekom / CCT5

Merapi -09.01.2021 / 8:46 am - image Frekom / CCT5

The explosive-effusive eruption continues this week at Klyuchevskoy.

KVERT mentions the observation of Strombolian to Vulcanian activity, accompanied by plumes of gas, steam and ash, throughout the week, at more than 6,000 meters in height, and extending up to 70 km from the volcano.

A lava flow continues to move into Kozyrevsku chute on the southern flank, characterized by a strong thermal anomaly.

Aviation code remains orange, other ash explosions may affect air traffic

 

Source: KVERT

Klyuchevskoy - Sentinel-2 image from 07.01.2021 / Copernicus via A.Vecoli - platformAdam

Klyuchevskoy - Sentinel-2 image from 07.01.2021 / Copernicus via A.Vecoli - platformAdam

Klyuchevskoy - thermal anomalies as of 08.01.2021 at 14:25 - Doc. Mirova _MODIS_logVRP

Klyuchevskoy - thermal anomalies as of 08.01.2021 at 14:25 - Doc. Mirova _MODIS_logVRP

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