Earthquake swarm under Trident stratovolcano, Alaska

Earthquake swarm under Trident stratovolcano, Alaska

A seismic swarm started under Trident stratovolcano, Alaska on August 24, 2022, likely driven by the movement of magma or magmatic fluids. The swarm is still in progress but now at a decreased rate. The last eruption of this volcano took place in 1974 (VEI 3).

Earthquake swarm detected in the vicinity of Edgecumbe volcano, U.S.

Earthquake swarm detected in the vicinity of Edgecumbe volcano, U.S.

m of earthquakes has been detected in the vicinity of Mount Edgecumbe volcano, beginning at about 10:00 UTC on April 11, 2022. The cause of the swarm is currently unknown. A small number of earthquakes were also recorded in 2020 but this swarm is unusual in the number of events. The last eruption of this volcano was in 2220 BCE (± 100 years).

Earthquake swarm under Davidof volcano, U.S.

Earthquake swarm under Davidof volcano, U.S.

Due to the possibility of escalating volcanic events associated with a swarm of earthquakes in the vicinity of Davidof volcano in Alaska, the Alaska Volcano Observatory (AVO) has raised the Aviation Color Code and the Volcano Alert Level for Davidof volcano to…

Ground deformation at Okmok volcano suggests shallow magma intrusion, U.S.

Ground deformation at Okmok volcano suggests shallow magma intrusion, U.S.

The Alaska Volcano Observatory (AVO) has observed a change from the long-term deformation pattern at Okmok volcano as measured by two continuous Global Navigation Satellite Systems (GNSS) stations within the caldera between September and November 2021. The…

Eruptive activity continues at Mount Cerberus on Semisopochnoi Island, Alaska

Eruptive activity continues at Mount Cerberus on Semisopochnoi Island, Alaska

Eruptive activity continues at the north crater of Mount Cerberus on Semisopochnoi Island, the Alaska Volcano Observatory (AVO) reported at 20:01 UTC on September 8, 2021. Seismicity at the volcano remains elevated and variable, with periods of continuous tremor,…

Increased seismicity at Atka volcanic complex, alerts raised, Alaska

Increased seismicity at Atka volcanic complex, alerts raised, Alaska

Due to increased seismicity detected southwest of Korovin volcano, Atka volcanic complex, the Alaska Volcano Observatory (AVO) has raised the Aviation Color Code for the volcano to Yellow and Alert Level to Advisory on August 11, 2021. Numerous small earthquakes…