Great Sitkin Volcano Maintains Elevated Alert Status
The Alaska Volcano Observatory has kept Great Sitkin on an orange alert as satellite data indicates slightly elevated surface temperatures and visible steam emissions persist.
Volcanologists at the Alaska Volcano Observatory continue to monitor activity at Great Sitkin, a volcano located in the Aleutian Islands of Alaska. As of September 25, 2026, the observatory has maintained an orange alert level for the site.
Satellite imagery captured during the week shows slightly elevated surface temperatures near the summit area. These thermal readings suggest ongoing subsurface heat activity without indicating a rapid escalation in intensity.
Visual observations from webcams and high-resolution satellite images confirm that steam is rising from the summit lava flow whenever atmospheric conditions permit clear visibility.
Despite these signs of volcanic unrest, seismic monitoring indicates low levels of tremor. The absence of significant ground shaking contrasts with the thermal and visual indicators at the peak.
At a glance
- Alert level: Orange
- Observed phenomena: Elevated surface temperatures; visible steam from summit lava flow
- Seismic activity: Low