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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
Ebeko - explosive episode of 07.08.2022 - photo archives L. Kotenko. IVS FEB RAS - one click to enlarge

Ebeko - explosive episode of 07.08.2022 - photo archives L. Kotenko. IVS FEB RAS - one click to enlarge

A moderate eruptive activity continues at Ebeko, in the northern Kuriles. According to visual data from Severo-Kurilsk volcanologists, explosions sent ash up to 4 km a.s.l., ash cloud drifts 5 km to the east of the volcano; an ash fall is observed in Severo-Kurilsk.

Moderate eruptive activity of the volcano continues. Ash explosions up to 6 km above sea level could occur at any time. Ongoing activity could affect low-flying aircraft and Severo-Kurilsk airport. The aviation color code remains orange.

 

Also in the Kuriles, the aviation code for Alaid remains orange, KVERT reports a new lava flow on September 24-28, remaining active until October 6. A thermal anomaly is identified by satellite.

The activity of Chirinkotan is marked by a plume of gas and ash at 3,500-4,000 m. on October 7; the ash cloud drifts for 80 km. The coda aviation was raised to Yellow by the SVERT

 

Sources: KVERT, SVERT, Global Volcanism Program & VAAC Tokyo

Nyiragongo - incandescence seen from Goma on 11.10.2022 - photo @mnkfcreatives - one click to enlarge

Nyiragongo - incandescence seen from Goma on 11.10.2022 - photo @mnkfcreatives - one click to enlarge

In the DRC, a renewed activity of Nyiragongo is mentioned by the Volcanological Observatory of Goma.

As he asks, I "broadcast faithfully, in full and without any commentary".

 

Source: Goma

Nyiragongo - press release from the Volcanological Observatory of Goma / 11.10.2022 - one click to enlarge

Nyiragongo - press release from the Volcanological Observatory of Goma / 11.10.2022 - one click to enlarge

Seifegebreil Shifferaw informs us that two Hornitos have recently formed, with a projection of lava, in the southern pit crater of Erta Ale, in Ethiopia.
They are impressive to see day and night.
The same situation happened in 2005, where the crater had a huge hornito for a few months.

 

Sources: Seifegebreil Shifferaw - http://sphere-voyage-ethiopia.com/ & Sentinel-2 via Mounts Project

Erta Ale - southern pit crater and fumaroles capping the 2 hornitos - via S.Shifferaw 10.2022 - click to enlarge

Erta Ale - southern pit crater and fumaroles capping the 2 hornitos - via S.Shifferaw 10.2022 - click to enlarge

Erta Ale - southern pit crater and a well formed hornito - via S.Shifferaw 10.2022 - click to enlarge

Erta Ale - southern pit crater and a well formed hornito - via S.Shifferaw 10.2022 - click to enlarge

Erta Ale - thermal anomalies on 10.10.2022 - image Sentinel-2 bands 12,11,8A zoom - via Mounts project - click to enlarge

Erta Ale - thermal anomalies on 10.10.2022 - image Sentinel-2 bands 12,11,8A zoom - via Mounts project - click to enlarge

Through the images of Stromboli surveillance cameras and field observations made by INGV staff, the eruptive scenario is stable and does not show any specific variation compared to what was reported in the press release of the October 11 (press release #6).

The effusive activity shows a moderate and variable regime feeding with the most advanced fronts remaining at an altitude of about 400 m. The pulsating regime of the lava effusion causes frequent collapses and detachments of material from the lava channel eroded and deepened by the flows and by the front itself which rolls along the Sciara del Fuoco rapidly reaching the coast and flowing in the sea.

Regarding the ordinary explosive activity, it does not show any particular variations and the projection activity at the North crater persists.
From the seismic point of view, the average amplitude of the volcanic tremor showed slight fluctuations, almost always and up to the current state in the medium-low level.
Since the last update, data from deformation monitoring networks on the island show no significant changes

 

Source: INGV OE – update 12.10.2022 / 1:28 p.m. local

Stromboli - observation from the sea on 12.10.2022 by INGV teams

Stromboli - observation from the sea on 12.10.2022 by INGV teams

In Iceland, the water flow at Grímsvötn is now approaching 300m³/s and the pack ice where the measuring devices are located has subsided by 7m. It is highly likely that the maximum outflow from the lakes will occur late Thursday or Friday evening. It can be calculated that it takes about 24 hours for runoff water to flow under the Skeiðarjökull glacier from Lake Grímsvötn and to the Gígjukvíslar channel via Highway 1. In the future, it is calculated that the maximum outflow from the lakes will be around 500 m³/s. It is likely that the flow at the bridge over Gígjukvísl will be less than that of the lakes themselves due to the attenuation of runoff in the reservoirs in front of Skeiðarjökull. The flow at the bridge in this route will therefore be equal to the high summer flow and will have no effect on the infrastructures, roads and bridges.

There is little to no seismic activity in the volcano and no volcanic eruptions are measured. The Icelandic Meteorological Agency and scientists from the University Institute of Geosciences continue to monitor Grímsvötn and will release information as the scenario develops.

 

Source: IMO

Grímsvötn - Doc. archives Veðurstofa Íslands / Oddur Sigurðsson - one click to enlarge

Grímsvötn - Doc. archives Veðurstofa Íslands / Oddur Sigurðsson - one click to enlarge

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