High-level eruption at Shishaldin volcano, Alaska
An ash cloud from Shishaldin Volcano reaching 12 km (40 000 feet) above sea level was observed in satellite data at 13:50 UTC on October 3, 2023.
Significant explosion at Shishaldin volcano, Alaska
A significant explosion occurred at Shishaldin Volcano in Alaska, U.S. at 09:09 UTC on July 14, 2023. The Aviation Color Code remains at Orange.
Earthquake swarm in the vicinity of Davidof volcano, alerts raised, Alaska
A swarm of earthquakes has occurred in the vicinity of Davidof volcano, Alaska over the past two days. A similar earthquake swarm occurred in December 2021. There is no known eruption of this volcano over the past 10 000 years. The largest earthquake in the…
Lava flow field at Great Sitkin grows to more than 1.3 square km, Alaska
Seismicity at Great Sitkin volcano continues at low but above background levels and satellite data shows elevated surface temperatures. In addition, new SAR images from DLR show the lava flow field has grown to more than 1.3 km2 (0.5 mi2). The SE edge seems to have…
Magma rising at Great Sitkin volcano, Alaska
A lava dome-like feature formed in the summit crater of Great Sitkin volcano, Alaska, suggesting magma is rising near the surface. As a result, the Alaska Volcano Observatory (AVO) has raised the Aviation Color Code to ORANGE and the Volcano Alert Level to WATCH. A…
Increase in eruptive activity at Semisopochnoi volcano, Alaska
Eruptive activity at Semisopochnoi has gradually increased over the last 24 hours, the Alaska Volcano Observatory (AVO) reported at 21:48 UTC on April 22, 2021. Satellite views of the volcano show a continuous plume extending 80 km (50 miles) to the south at…
Sustained ash emissions at Semisopochnoi volcano, Aviation Color Code raised to Red, Alaska
The Alaska Volcano Observatory (AVO) has raised the Aviation Color Code to Red and the Alert Level to Warning for Semisopochnoi volcano on Friday, April 16, 2021, after sustained ash emissions rose up to 6 km (20 000 feet) a.s.l. Satellite data suggest ash emissions…
Renewed activity at Veniaminof volcano, Aviation Color Code raised to Orange, Alaska
Low-level ash emissions from the summit of Veniaminof volcano, Alaska were observed in web camera views on April 5, 2021, the Alaska Volcano Observatory (AVO) reported at 20:49 UTC. Because of the renewed activity, AVO has raised the Aviation Color Code to ORANGE…
Increased gas emissions and elevated surface temperatures at Cleveland volcano, Alaska
The Alaska Volcano Observatory (AVO) has raised the Aviation Color Code for Cleveland volcano to Yellow and the Volcano Alert Level to Advisory at 21:44 UTC on March 20, 2021. Satellite detections of increased volcanic gas emissions and elevated surface temperatures…
Small explosion at Semisopochnoi volcano, Aviation Color Code raised to Orange, Alaska
Regional infrasound sensors detected a small explosion at Semisopochnoi volcano, Alaska on March 19, 2021, indicating an increase in eruptive activity. As a result, the Alaska Volcano Observatory (AVO) has raised the Aviation Color Code to ORANGE and the Volcano…