Shishaldin volcano news & activity updates:
Shishaldin volcano (Aleutian Islands, Alaska): elevated surface temperature; thin ash deposit
mercredi mai 06, 2020 07:37 | AUTEUR : MARTIN
Elevated surface temperature visible from satellite (image: Sentinel 2)
The Alaska Volcano Observatory (AVO) reported that unrest continues at the volcano. A satellite image shows gas-steam plume containing some amount of ash extending a short distance southeast from the summit.
An ash plume from Shishaldin volcano (image: @tonyveco/twitter)
Seismicity remains at low levels including periods of occasional amplitude tremor.
Elevated surface temperatures in the summit crater were observed.
No explosive activity was detected.
Retrospective analysis suggests to an increase in the diameter and depth of the vent within the summit crater, likely a small collapse occurred approx. one week ago.
Activity could escalate with little warning, and additional eruptive activity within the summit crater, lava flows, lahars, and ash-producing eruptive events could occur.
Source: Alaska Volcano Observatory volcano activity update 6 May 2020
vendredi, avril 17, 2020
The Alaska Volcano Observatory (AVO) reported that seismicity has decreased over the past two weeks. Satellite views show no lava or changes within the crater since the start of April, accompanied by a decrease in surface temperatures. ... lire toutes
lundi, avril 06, 2020
The Alaska Volcano Observatory (AVO) reported that unrest continues at the volcano. Seismicity remained elevated including periods of weak continuous tremor and occasional low-frequency earthquakes. ... lire toutes
jeudi, mars 26, 2020
The Alaska Volcano Observatory (AVO) reported that seismicity remains elevated with continuous low-level tremor. Satellite and web camera views were mostly obscured by clouds over the past 24 hours, but one relatively clear image showed a small gas plume emanating from the summit of the volcano. Eruptive activity appears confined to the summit area during this most recent period of unrest, which started mid-March. Activity could increase with little or no warning, however, resulting in lava flows and lahars outside of the crater and (or) ash emissions. lire toutes
vendredi, mars 20, 2020
The Alaskan Volcano Observatory (AVO) report that the eruptive activity continues at Shishaldin volcano. Minor explosive activity has subsided over the past 24 hours, but seismicity remains elevated with near-continuous tremor. A small steam plume from the summit was observed over the past 24 hours. For now, eruptive activity looks as if it is confined to the summit area, but activity could increase with little or no warning resulting in lava flows outside of the crater, lahars, and ash emissions. ... lire toutes
dimanche, mars 15, 2020
Shishaldin volcano (Aleutian Islands, Alaska) activity update: the aviation color code raised to Orange
The Alaska Volcano Observatory (AVO) reported that a high-resolution satellite image shows lava and what appears to be a new cone within the volcano summit crater. Weak seismic tremor has been detected. ... lire toutes