USGS Volcano Notice - DOI-USGS-AVO-2024-09-23T19:46:11+00:00

Lava continues to erupt slowly at Great Sitkin Volcano. Ongoing activity is adding to a thick lava flow that fills most of the summit crater. Satellite radar data (that can see through clouds) show that over the past two weeks the northern side of the eastern lava lobe advanced roughly 10 meters to the north. Small rock falls off of the leading edge of the flow were observed. Small earthquakes associated with the ongoing lava eruption continue. Other satellite and web camera views were obscured by clouds over the past day and nothing noteworthy was observed.

A single explosive event occurred in May 2021 and was followed by the ongoing eruption of lava that began in July 2021. No explosive events have occurred since 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.