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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

A moderate eruptive activity continues at Ebeko, with this February 27 an explosion accompanied by an ash plume at more than 2,500 meters asl, then drifting 3 km to the southwest of the volcano

The aviation code remains orange, with other explosions potentially affecting low-altitude flights and Severo-Kurilsk airport.

 

Sources: KVERT, VAAC Tokyo and Toppress

Ebeko - gas plume and ash - photo Toppress 02.27.2021

Ebeko - gas plume and ash - photo Toppress 02.27.2021

The VAAC Darwin issued an orange VONA on February 28 for the Sinabung, following a discreet emission of ash up to an altitude of flight 110, with extension to the southwest.

The seismicity of February 27 is characterized by:

- 29 collapse / avalanche earthquakes, with an amplitude of 3 to 120 mm and a duration of 35 to 161 seconds of the earthquake.
- 3 blast earthquakes, with an amplitude of 13 to 16 mm and the earthquake lasted 15 to 45 seconds.
- 189 low frequency earthquakes with an amplitude of 3 to 10 mm and the duration of the earthquake was 6 to 30 seconds.
- A distant tectonic earthquake.

The activity level remains at 3 / siaga.

 

Sources: VAAC Darwin, Nachelle homestay

Sinabung - 02/28/2021 / 6:53 am - photo Nachelle homestay

Sinabung - 02/28/2021 / 6:53 am - photo Nachelle homestay

The Sakurajima experienced this February 28 at 10 a.m. JST an explosion, accompanied by a plume rising to 1,500 m. above the Minamidake crater, with dispersion towards the northwest.

The JMA reports that large volcanic bombs were scattered between 800 and 1,000 m. from the crater.

 

Source: JMA

February 28, 2021, ~ Explosion ~ 桜島 Sakurajima Volcano, Japan ~ 10:00 JST

In Kilauea, lava from the West Vent continues to feed the lava lake in Halema'uma'u Crater.

The active western half of the lava lake measured approximately 217 m. depth, measured by a remote laser rangefinder on the morning of February 27, 2021.

Observations yesterday afternoon indicated that lava effusion continues at the western fissure. The lava quickly develops a thin crust as it flows outward to the east with occasionally a crust sinking between the vent and the main island, but not beyond the island.

Stagnant (solidified) lake crust covers the eastern half of the lake and slowly grows west around the main island. The position and dimensions of the main island and the smaller islands have not changed due to the solidified crust. Some minor scree debris collects on the lava surface around one or two of the islands as their edges cool, crack and begin to crumble.
 

Source: HVO

Kilauea / Halema'uma'u crater - map of summit eruptive activity - Doc. HVO-USGS

Kilauea / Halema'uma'u crater - map of summit eruptive activity - Doc. HVO-USGS

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