Increased seismicity beneath Tanaga volcano, Alaska

Increased seismicity beneath Tanaga volcano, Alaska

In response to increased seismicity beneath the Tanaga volcano detected on March 6 and 7, 2023, the Alaska Volcano Observatory (AVO) raised the Aviation Color Code to Yellow and the Volcano Alert Level to Advisory.

Increased seismic activity under Trident volcano, Alaska

Increased seismic activity under Trident volcano, Alaska

On February 22, 2023, the Alaska Volcano Observatory (AVO) raised the alert level of Trident Volcano to ADVISORY and the Aviation Color Code to YELLOW due to an increase in seismic activity beneath the volcano. The last eruption at this volcano was in 1974 (VEI 3).

Increased seismic activity under Aniakchak volcano, alerts raised, Alaska

Increased seismic activity under Aniakchak volcano, alerts raised, Alaska

The Alaska Volcano Observatory (AVO) has raised the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY for Aniakchak volcano on February 23, 2023, following an increase in seismic activity. The last eruption at this volcano took place in 1931 (VEI 4).

Earthquake swarm under Takawangha volcano continues, Alaska

Earthquake swarm under Takawangha volcano continues, Alaska

Earthquake swarm under Takawangha volcano, Alaska continues since mid-November. The Aviation Color Code remains at Yellow and the Volcano Alert Level at Advisory. The last known eruption at this volcano took place in 1550 CE (VEI unknown).

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).