Recent earthquake hypocenters at Atka volcanic complex, August 11, 2021.

Recent earthquake hypocenters at Atka volcanic complex, August 11, 2021.

Date: Aug 11th, 2021
Volcano(es): Atka volcanic complex
Photographer: Loewen, M. W.
URL: avo.alaska.edu/image/view/175701

Atka 2021 unrest

On August 11, 2021, the Alaska Volcano Observatory raised the Aviation Color Code and Alert Level at the Atka volcanic complex to YELLOW/ADVISORY after detecting an increased number of small, shallow earthquakes over the past day. These earthquakes have been located 3 to 6 km (1.9 to 3.7 miles) deep and around 7 km (4.3 miles) southwest of Korovin Volcano. The earthquakes represent an increase from background seismic activity, but may not necessarily lead to an eruption. Earthquake activity declined by late August; AVO returned Atka Volcanic Complex to GREEN/NORMAL on August 27, 2021.

Image courtesy of AVO/USGS.
Please cite the photographer and the Alaska Volcano Observatory / U.S. Geological Survey when using this image.
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