Semisopochnoi volcano (Aleutian Islands, USA) - Smithsonian / USGS Weekly Volcanic Activity Report for 17 May-23 May 2023 (Continuing Activity)
Wed, 24 May 2023, 14:00 14:00 PM | BY: VNOn 17 May AVO reported that eruptive activity at Semisopochnoi had declined during the previous week, though seismicity remained slightly elevated and low-level steaming continued from Mount Young. Ash emissions had last occurred on 5 May leaving minor deposits on the NW flank of Mount Young's N crater. The Aviation Color Code was lowered to Yellow (the second lowest level on a four-color scale) and the Volcano Alert Level was lowered to Advisory (the second highest level on a four-level scale).
Intense gas emissions were periodically visible in webcam images during 17-18 and 20-21 May. On 22 May a weak sulfur dioxide signal was detected, suggestive of low-level degassing.
Source: US Geological Survey Alaska Volcano Observatory (AVO)
From: Global Volcanism Program, 2023. Report on Semisopochnoi. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 17 May-23 May 2023. Smithsonian Institution and US Geological Survey.
- All news about: Semisopochnoi volcano
- Information about: Semisopochnoi volcano
Thu, 18 May 2023, 05:36
Semisopochnoi volcano (Aleutian Islands): activity waned, alert status lowered to Yellow
The Alaska Volcano Observatory (AVO) reported a decreased activity at the volcano over the past week. ... Read all
Wed, 17 May 2023, 14:00
Semisopochnoi volcano (Aleutian Islands, USA) - Smithsonian / USGS Weekly Volcanic Activity Report for 10 May-16 May 2023 (Continuing Activity)
AVO reported that low-level unrest continued at Semisopochnoi during 9-16 May. Weather clouds mostly obscured satellite and webcam views. Volcanic tremor was detected during 9-10 May; there was no evidence of explosive or earthquake activity in the geophysics data during the rest of the week. ... Read all