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).

Increased rate of uplift near South Sister volcano, Oregon

Increased rate of uplift near South Sister volcano, Oregon

Cascades Volcano Observatory geophysicists have detected a subtle increase in the rate of uplift of the ground surface about 5 km (3 miles) west of South Sister volcano, Oregon, U.S. Episodes of increased uplift have been observed in this area before, and 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…

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…

New eruption at Kilauea volcano, Aviation Color Code raised to Red, Hawaii

New eruption at Kilauea volcano, Aviation Color Code raised to Red, Hawaii

A new eruption began at Kilauea volcano's Halema‘uma‘u crater at approximately 01:20 UTC on September 30, 2021 (15:20 HST, September 29). As a result, the USGS Hawaiian Volcano Observatory (HVO) raised the Volcano Alert Level for ground-based hazards…

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…