Shishaldin volcano (Aleutian Islands, Alaska): alert level lowered

Пт, 27 сен 2019, 21:54

21:54 PM | ПЇЅПЇЅПЇЅПЇЅПЇЅ: T

Seismicity at the volcano has decreased over the past few weeks to levels slightly above background. In addition, satellite views of the volcano over the same period show a decrease in surface temperatures at the summit. Eruptive activity appears to have ended or paused.
Due to this decrease in activity, the Alaska Volcano Observatory is decreasing the Aviation Color Code for Shishaldin Volcano to YELLOW and the Alert Level to ADVISORY.

О НОВОСТИ ВСЕ: Shishaldin вулкан
О ИНФОРМАЦИЯ: Shishaldin вулкан

Предыдущие новости

Wed, 25 Sep 2019, 06:00

Shishaldin volcano (Fox Islands, USA) - Smithsonian / USGS Weekly Volcanic Activity Report for 25 September-1 October 2019 (Continuing Activity)

On 26 September AVO reported that seismicity at Shishaldin had decreased during the previous few weeks to levels slightly above background. Satellite images indicated decreased surface temperatures at the summit over the same period and showed collapse and slumping of the floor of the summit crater, suggesting a withdrawal of magma. Tiltmeter data suggested that the collapse may have occurred on 19 September. ... Read all

Wed, 18 Sep 2019, 06:00

Shishaldin volcano (Fox Islands, USA) - Smithsonian / USGS Weekly Volcanic Activity Report for 18 September-24 September 2019 (Continuing Activity)

AVO reported that during 18-24 September low-level tremor at Shishaldin continued to be recorded, along with elevated surface temperatures at the summit crater visible in satellite images when views were not obscured by clouds. The data suggested ongoing, slight growth of the scoria cone and lava flows within the summit crater. The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Watch. ... Read all

Wed, 11 Sep 2019, 06:00

Shishaldin volcano (Fox Islands, USA) - Smithsonian / USGS Weekly Volcanic Activity Report for 11 September-17 September 2019 (Continuing Activity)

Low-level lava fountaining and minor explosive activity within Shishaldin's summit crater was last observed on 17 August and likely continued during 11-17 September; continuous tremor was recorded by the seismic network and elevated surface temperatures were visible in satellite images. The webcam possibly recorded a steam emission on 16 September. The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Watch. ... Read all

Wed, 4 Sep 2019, 06:00

Shishaldin volcano (Fox Islands, USA) - Smithsonian / USGS Weekly Volcanic Activity Report for 4 September-10 September 2019 (Continuing Activity)

Low-level lava fountaining and minor explosive activity within Shishaldin's summit crater was last observed on 17 August and likely continued during 4-10 September; continuous tremor was recorded by the seismic network and moderately-elevated surface temperatures were visible in satellite images. Elevated surface temperatures on the upper SE flank suggested that minor amounts of lava spatter may have extended beyond the summit crater; clear webcam images showed no evidence of hot deposits on the upper flank the next day. The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Watch. ... Read all

Shishaldin volcano (Aleutian Islands, Alaska): alert level lowered

Предыдущие новости

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