USGS Volcano Notice - DOI-USGS-AVO-2024-07-10T19:41:31+00:00

No significant changes seen at Great Sitkin Volcano where lava continues to slowly erupt within the summit crater. Over the past day, a few earthquakes were detected beneath the volcano. Clear webcam views showed minor steaming from the snow-free areas of the active lava flow. Satellite imagery was mostly obscured by clouds throughout the day.

The current lava flow eruption began in July 2021. No explosive events have occurred since a single event in May 2021.

Local seismic and infrasound sensors and web cameras are used to monitor Great Sitkin along with regional infrasound and lightning networks and satellite data.

No major changes were detected in the past day at Shishaldin Volcano, where minor volcanic unrest continues. Small, low-frequency earthquakes and intermittent seismic tremor were detected. A steam plume from the summit is visible in partly cloudy webcam views this morning. No activity detected in partly cloudy satellite views over the past day.

Minor rock falls associated with gravitational collapse of the unstable ground in and near the summit crater may occur without warning. The collapse events can generate small clouds of dust likely composed of fine-grained ash. The diffuse dust clouds dissipate quickly and can produce irregular-shaped deposits near the summit. The last significant ash-producing eruption occurred in November 2023. 

Local seismic and infrasound sensors, web cameras, and a geodetic network are used to monitor Shishaldin Volcano. In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lighting data, and satellite images to detect eruptions.