Shishaldin volcano (Aleutian Islands, Alaska): low-level eruptive activity continues

Ср, 27 ноя 2019, 08:42
08:42 AM | ПЇЅПЇЅПЇЅПЇЅПЇЅ: MARTIN
Incandescence partially visible due to clouds over the summit crater (image: Sentinel 2)
Incandescence partially visible due to clouds over the summit crater (image: Sentinel 2)
The Alaska Volcano Observatory (AVO) reported that seismicity at the volcano has decreased over the past day, but remains elevated. Strongly elevated surface temperatures have been observed in multiple satellite images over the past 24 hours.
Incandescence was occasionally visible from the summit crater in web camera images overnight.
Analysis of satellite imagery indicate that a partial collapse of the summit cone sometime around 23:30 UTC on November 24th produced a pyroclastic flow that extended up to 3 km from the summit down the northwest flank of the volcano.
Lava flows on the northwest flank remain active, currently about several hundred m long.
No ash plumes have been detected.
Source: USGS AVO volcano activity update 27 November 2019

Предыдущие новости

Wed, 27 Nov 2019, 06:00
AVO reported that seismic levels at Shishaldin were variable but elevated during 26 November-3 December. Weather clouds sometimes obscured satellite image views and mostly prevented webcam views, though elevated surface temperatures were still visible in multiple satellite images. An active 1.5-km-long lava flow on the NW flank was visible in satellite images on 1 December. ... Read all
Sun, 24 Nov 2019, 20:17
USGS AVO reports that Shishaldin Volcano has been in an eruptive hiatus over the past several days, with low seismic tremor and only weakly elevated surface temperatures, consistent with cooling lava flows. No anomalous activity has been observed in AVO's satellite and webcam data, and no ash plumes have been detected. ... Read all
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