Steaming at Korovin Volcano, taken 12/08/2020, by Atka resident William Dushkin.

Steaming at Korovin Volcano, taken 12/08/2020, by Atka resident William Dushkin.

Date: Dec 8th, 2020
Volcano(es): Korovin
Photographer: Dushkin, William
URL: avo.alaska.edu/image/view/163431

Korovin unrest 2020/10

From Orr and others, 2024: "The first indication of unrest at Atka volcanic complex in 2020 was a small increase in seismic activity. This activity started in early June and culminated with episodic tremor on June 11-12. The amplitude of the tremor pulses, which each lasted 10-40 minutes, increased slowly and peaked on June 12 at ~13:50 UTC (~04:50 HADT). The tremor then subsided to background levels for the next several months.
"Beginning on October 15, the TROPOMI satellite instrument made occasional SO2 detections at Atka volcanic complex. These SO2 detections were the first at the complex in 2020 and indicated elevated volcanic degassing. An additional two satellite SO2 detections were made during the next two weeks, which also coincided with an increase in the number of earthquakes located in the area. In response to this heightened level of activity, AVO elevated the Aviation Color Code and Volcano Alert Level to YELLOW and ADVISORY on October 28. No additional satellite SO2 detections were made in the following weeks, and seismicity declined in late November, indicating a return to background activity. AVO subsequently lowered the Aviation Color Code and Volcano Alert Level back to GREEN and NORMAL on December 3."

Location:

Latitude: 52.210109

Longitude: -174.206741


William Dushkin

Full Resolution.