The Alaska Volcano Observatory (AVO) raised the Aviation Color Code for Korovin Volcano to Yellow and the Volcano Alert Level to Advisory after instruments detected a small phreatic explosion at 03:55 AKDT (11:55 UTC) on July 16, 2026.
A small explosion occurred at Korovin volcano on Atka Island, Alaska, at 21:27 AKDT on October 29, 2025, prompting the Alaska Volcano Observatory to raise the Aviation Color Code and Alert Level to Yellow / Advisory.
A small explosive event was recorded at the Atka volcanic complex in the Aleutian Islands, U.S., at 19:26 LT on February 20, 2025 (04:26 UTC on February 21). The Aviation Color Code has been raised to Orange and Alert Level to Watch.
A small, short-lived explosion was detected at the Atka volcanic complex in Alaska at 03:36 UTC on March 28, 2024 (19:36 AKDT on March 27).
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…
