Mount Gareloi’s seismic surge linked to magmatic-hydrothermal changes, U.S.

Mount Gareloi’s seismic surge linked to magmatic-hydrothermal changes, U.S.

The Alaska Volcano Observatory (AVO) has detected a notable increase in seismicity at Mount Gareloi beginning at 18:15 UTC on February 12, 2024, prompting the elevation of the Aviation Color Code to Yellow and the Volcano Alert Level to Advisory. Despite the uptick in seismic activity, there are no signs of an imminent eruption.

Slow lava eruption continues at Great Sitkin volcano, Alaska

Slow lava eruption continues at Great Sitkin volcano, Alaska

The Alaska Volcano Observatory reported a continuous slow eruption of lava in the summit crater of Great Sitkin Volcano as of 19:30 UTC on January 30, 2024. The Aviation Color Code remains at Orange and Alert Level at Watch.

Earthquake swarm in the vicinity of Davidof volcano, alerts raised, Alaska

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

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

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

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…