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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
Raung - 08.02.2021 / 08:08 WIB - PVMBG webcam

Raung - 08.02.2021 / 08:08 WIB - PVMBG webcam

Raung - 08.02.2021 / 05:57 WIB - webcam PVMBG

Raung - 08.02.2021 / 05:57 WIB - webcam PVMBG

In Raung, after a night when incandescence was perceived at the crater, emissions of gray and black ash are observed, this February 8, 2021, between 1,000 and 2,000 meters above the summit. An orange Vona is issued for ash at flight altitude 180 drifting east.

Seismicity is characterized by a continuous tremor of amplitude between 3 and 22 mm, with a dominant at 6 mm.

The activity level remains at 2 / waspada, with a ban of 2 km radius around the crater.

 

Sources: PVMBG, Magma Indonesia and VAAC Darwin.

Raung - incandescence of the crater on 02/07/2021 / 8:22 p.m. WIB - webcamPVMBG

Raung - incandescence of the crater on 02/07/2021 / 8:22 p.m. WIB - webcamPVMBG

Raung - Volcanic ash advisory 08.02.2021 - Doc. VAAC Darwin IDY65310

Raung - Volcanic ash advisory 08.02.2021 - Doc. VAAC Darwin IDY65310

Insivumeh reports weak to moderate Strombolian explosive activity in Pacaya, accompanied by an eruptive column that can reach 200 meters above the crater which causes the fall of ash in its surroundings; some explosions generate falling ballistic elements within a radius of 50 m.

A lava flow is active in a south-southwest direction with a length of approximately 850 meters.

The amplitude of the seismic signal has decreased over the past few hours.

 

Source: Insivumeh

Pacaya - explosive and effusive activity of 07.02.2021 - Doc. Insivumeh

Pacaya - explosive and effusive activity of 07.02.2021 - Doc. Insivumeh

Pacaya - RSAM at 07.02.2021 (the orange and green boxes correspond to previous reports) - Insivumeh report 02.07.2021 / 4 p.m. loc.

Pacaya - RSAM at 07.02.2021 (the orange and green boxes correspond to previous reports) - Insivumeh report 02.07.2021 / 4 p.m. loc.

The JMA reports four eruptions at the Minamidake crater of Sakurajima on February 8, including three explosives; they were accompanied by a plume of ash, including one at 2,000 meters above the crater, drifting towards the south-east.
Night incandescence was observed.
The quantities of sulfur dioxide emitted remain high.

Source: JMA

Sakurajima - 08.02.2021 / 10:53 - 11:06 - JMA webcam

Sakurajima - 08.02.2021 / 10:53 - 11:06 - JMA webcam

High-resolution satellite images from February 6 showed a small deposit of ash extending less than 3 km north of the North Cerebus crater on Semisopochnoi , in the Aleutians.

Steam emissions obscured the view of the crater. There is no evidence of continued activity, but sighting of a new deposit suggests a new period of unrest, and the Alaska Volcano Observatory has increased the aviation color code Yellow and the alert level of the volcano at Advisory.

 

Small eruptions producing minor deposits of ash near the volcano have been typical of activity during the unrest in Semisopochnoi since September 2018, the last activity detected in June 2020. Local seismic stations have been offline since November 11, 2020.

 

Source: AVO

Semisopochnoi - 06.02.2021 / 10:33 PM UTC - photo captioned by Matt Loewen / USGS / AVO. Imagery DigitalGlobe via NextView license

Semisopochnoi - 06.02.2021 / 10:33 PM UTC - photo captioned by Matt Loewen / USGS / AVO. Imagery DigitalGlobe via NextView license

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