A small steam explosion at 05:40 UTC on June 2, 2019 (21:40 AKDT June 1) was detected at Great Sitkin volcano in local seismic data, the Alaska Volcano Observatory reports. No corresponding signal was seen in regional infrasound data or cloudy satellite…
A strong and shallow earthquake registered by the USGS as M6.1 hit off the coast of Amatignak Island, Alaska at 08:45 UTC on May 23, 2019. The agency is reporting a depth of 27.8 km (17.3 miles). EMSC is reporting M6.1 at a depth of 56 km (34.8 miles). The epicenter…
Low-frequency seismic tremor and vigorous steam plume have been observed at Pavlof volcano, Alaska over the past 2 days, forcing the Alaska Volcano Observatory (AVO) to raise the Aviation Color Code and Alert Level to Yellow/Advisory on May 15, 2019. The…
A strong and shallow earthquake registered by the USGS as M6.5 hit Rat Island, Aleutian Islands, Alaska at 21:35 UTC on April 2, 2019. The agency is reporting a depth of 19.1 km (11.8 miles). EMSC is reporting M6.5 at a depth of 10 km (6.2 miles). The quake was…
A new lava dome was observed in the summit crater of Cleveland volcano prompting the Alaska Volcano Observatory to upgrade the Color Code/Alert Level to ORANGE/WATCH on January 17, 2019. No explosive activity has been detected or observed in seismic or infrasound…
A strong and shallow earthquake registered by the USGS as M6.1 hit off the coast of Cold Bay, Alaska at 02:35 UTC on December 31, 2018. The agency is reporting a depth of 26.9 km (18.4 miles). EMSC is reporting M6.1 at a depth of 40 km (24.8 miles). This earthquake…
A short-lived explosion was detected at Cleveland volcano early December 29, 2018. Ash cloud was reported rising up to 5.2 km (17 000 feet) above sea level. The Aviation Color Code remains Orange since December 12. Local seismic sensors recorded a short-lived…
Ash emissions at Veniaminof volcano increased significantly on November 21, 2018, forcing Alaska Volcano Observatory to raise the Aviation Color Code to Red and Volcano Alert Level to Warning. Veniaminof is generating a plume of ash up to 4.6 km (15 000 feet) above…
Strong seismic tremor consistent with an eruption was recorded at Semisopochnoi volcano starting at 04:47 UTC (20:47 AKDT) on October 26, 2018. Satellite data through 05:00 UTC showed a small ash cloud at about 3.6 km (12 000 feet) above sea level, the Alaska…
The Alaska Volcano Observatory (AVO) has raised the Aviation Color Code to Orange and the Volcano Alert Level to Watch for Veniaminof volcano at 21:29 UTC on September 4, 2018. The last known eruption of this volcano took place in 2013. The decision to raise alerts…
