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Shishaldin volcano (Fox Islands, USA) - Smithsonian / USGS Weekly Volcanic Activity Report for 31 July-6 August 2019 (New Activity / Unrest)

Wed, 31 Jul 2019, 06:00
06:00 AM | BY: VN
AVO reported that satellite images of Shishaldin acquired on 28 July showed a small spatter cone with lava flows in the summit crater. During 31 July-6 August continuous weak tremor was recorded by the seismic network and elevated surface temperatures were sometimes visible in satellite images. A small steam plume was observed in a few satellite and web camera images.
The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Watch.

Source: US Geological Survey Alaska Volcano Observatory (AVO)
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From: Global Volcanism Program, 2019. Report on Shishaldin. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 31 July-6 August 2019. Smithsonian Institution and US Geological Survey.

Previous news

Wed, 24 Jul 2019, 20:44
The new lava lake seen during an overflight. Credit: David Fee, AVO/UAF-GI.
Recent unrest (seismic tremor, thermal anomalies) has increased and a new, very minor eruption is underway. AVO field crews observed a small lava lake inside the deep funnel-shaped summit crater, but the activity has been contained within the crater so far. This is similar to the last eruption in 2014-15. The alert level has been raised to ORANGE/WATCH. A more substantial eruption is possible (like that of 1999) but there is no indication of this occurring so far. ... Read all
Wed, 24 Jul 2019, 06:00
On 23 July field crews observed minor spattering and surface lava flows in Shishaldin's summit crater during an overflight, prompting AVO to raise the Aviation Color Code to Orange and the Volcano Alert Level to Watch. Elevated surface temperatures were observed in multiple satellite images during 24-30 July, though views were sometimes obscured by weather clouds. Nearly continuous weak seismic tremor was detected, and occasional infrasound signals consistent with small Strombolian explosions were recorded during 26-27 July. ... Read all
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