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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 : #Actualités volcaniques, #volcanic activity
Lewotolok - eruptive plume from 11/27/2020 / 6:14 a.m. WITA - photo PVMBG Magma

Lewotolok - eruptive plume from 11/27/2020 / 6:14 a.m. WITA - photo PVMBG Magma

There was an eruption at Mount Ili Lewotolok, on Lembata Island in the Flores Sea in Indonesia, this Friday, November 27, 2020, at 05:57 a.m. WITA; it was accompanied by an ash plume observed at ± 500 m above the peak (± 1923 m above sea level). We observe that the ash column is gray to black with a thick intensity towards the west. This eruption was recorded on a seismograph with a maximum amplitude of 34 mm and a duration of 120 seconds.

Between 0 and 12h local, the seismicity is characterized by 10 volcanic earthquakes of amplitude 3-16 mm

The activity level is 2 / waspada, with a danger zone of 2 km radius around the summit (hazard zone II), and an orange aviation code.

 

The last eruption of this stratovolcano dates back to January 2012.

 

Source: PVMBG, Magma Indonesia, VAAC Darwin

  Lewotolok - OPO A5 2020 photo via Rizal

Lewotolok - OPO A5 2020 photo via Rizal

Lewotolok - risk zones map - doc. CVGHM

Lewotolok - risk zones map - doc. CVGHM

Lewotolok - sismicité au 26.11.2020 - Doc. Magma Indonesia

Lewotolok - sismicité au 26.11.2020 - Doc. Magma Indonesia

At Merapi, the situation does not change much. Seismicity is characterized on November 26 by

- 44 collapse / avalanche earthquakes

- 120 blast / emission earthquakes

- 33 volcanic earthquakes

- 309 hybrid / multiphase earthquakes.

The inflation ratio is 12 cm / day

 

Source: BPPTKG

 Merapi - 27.11.2020 / 05h52 WIB - Doc. PGM Jrakah

Merapi - 27.11.2020 / 05h52 WIB - Doc. PGM Jrakah

Merapi - seismicity at 26.11.2020 - Doc. BPPTKG

Merapi - seismicity at 26.11.2020 - Doc. BPPTKG

At Pacaya, atmospheric conditions allow only rare direct observations.

Incandescence is noticed at the Mackenney cone. Degassing is present about 300 meters above the crater.

Two lava flows emanating from the fissure on the south-west flank are observed by satellite, respectively 450 m and 500 m long. They can generate ash columns related to collapses

Seismic stations record weak explosions and tremor due to the ascent of magma and gases to the surface.

 

Source: Insivumeh daily bulletin.

Pacaya - Sentinel-2 bands image 12,11,5 from 11.25.2020 - via Insivumeh

Pacaya - Sentinel-2 bands image 12,11,5 from 11.25.2020 - via Insivumeh

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