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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 - pyroclastic flow and co-pyroclastic cloud from 25.10.2020 - photos Rizal at Antara
Sinabung - pyroclastic flow and co-pyroclastic cloud from 25.10.2020 - photos Rizal at Antara

Sinabung - pyroclastic flow and co-pyroclastic cloud from 25.10.2020 - photos Rizal at Antara

Sinabung - seismogramma of 25.10.2020 / 13h WIB - Doc. Magma Indonesia

Sinabung - seismogramma of 25.10.2020 / 13h WIB - Doc. Magma Indonesia

At Sinabung, on Sumatra, a pyroclastic flow was observed with a slide distance of 1500 to 2500 m and a collapse with a slide distance of 500 to 1500 m to the east and southeast on October 25.
In addition, it was recorded:
- 2 earthquakes accompanying the flow of blocks and / or pyroclastics
- 68 earthquakes of collapse
- 8 blast earthquakes
- 11 low frequency earthquakes
- 14 hybrid / multiphase earthquakes
- 2 distant Tectonic earthquakes.


Communities and visitors / tourists not to conduct activities in the villages that have been displaced, as well as the location 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.
 People who live near the Sinabung drainages should be aware of the dangers of lahar.

The activity level is at 3 / siaga.

Source: PVMBG

Activity of Sinabung, Merapi and Rincon de La Vieja.

In Merapi, on Java, the seismicity reveals periods of significant fumarole emissions on October 23, decreasing on October 24 and 25.


On October 23, the main crater emits white fumaroles with a thick and high intensity about 250 meters from the peak.
On October 23, 2020, it was recorded at the seismicity level:
- 49 collapse earthquakes
- 65 blast earthquakes
- 22 low frequency earthquakes
- 75 hybrid / multiphase earthquakes
- 4 shallow volcanic earthquakes

 The main crater is white smoke with a fine, medium to thick intensity, about 100 meters from the summit.
 Thanks to the seismographic recordings of October 24, 2020, it was recorded:
- 34 collapse earthquakes
- 43 blast earthquakes
- 84 hybrid / multiphase earthquakes
- 7 shallow volcanic earthquakes
- 1 remote tectonic earthquake

October 23, 2020, it was recorded:
- 49 collapse earthquakes
- 65 blast earthquakes
- 22 low frequency earthquakes
- 75 hybrid / multiphase earthquakes
- 4 shallow volcanic earthquakes.

The number of hybrid-type earthquakes remains high.

Source: BPPTKG

Merapi seismicity at 25.10.2020 - note the peak of the last three days, with a max. the 23.10 - Doc. Magma Indonesia

Merapi seismicity at 25.10.2020 - note the peak of the last three days, with a max. the 23.10 - Doc. Magma Indonesia

In Rincon de La Vieja, a small eruption probably occurred around 7:30 am on October 25, without being able to be confirmed by the cameras.

At 8:06 a.m. local time on October 24, 2020, an eruption was recorded at the Rincon de la Vieja volcano, with a column that rose 1000 meters above the height of the crater, or 2916 m.s.n.m. (meters above sea level)
Duration of activity: 1 minute.
Seismic activity is similar compared to yesterday.
At the time of this report, the winds are blowing east.

 

Source: Ovsicori

 Rincon de La Vieja - 24.10.2020 / 8:07 am-8:08 am - Doc. Ovsicori

Rincon de La Vieja - 24.10.2020 / 8:07 am-8:08 am - Doc. Ovsicori

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