|(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)|
|(3) Volcano:||Atka Volcanic Complex (VNUM #311160)|
|(4) Current Color Code:||YELLOW|
|(5) Previous Color Code:|
|(6) Source:||Alaska Volcano Observatory|
|(7) Notice Number:||2021/A629|
|(8) Volcano Location:||N 52 deg 19 min W 174 deg 8 min|
|(10) Summit Elevation:||5030 ft (1533 m)|
|(11) Volcanic Activity Summary:||The Alaska Volcano Observatory is raising 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.
Previous alerts by the Alaska Volcano Observatory for unrest for the Atka volcanic complex have been for Korovin Volcano, the site of the most recent historical eruptions. The location of earthquakes, however, is not specific to Korovin and could be related to several other volcanic vents that are part of the Atka volcanic complex, including Mount Kliuchef.
The Alaska Volcano Observatory will continue to monitor the Atka volcanic complex for signs of volcanic activity. The area is monitored by local seismic and infrasound sensors, satellite data, and regional lightning detection instruments.
|(12) Volcanic cloud height:||n/a|
|(13) Other volcanic cloud information:||n/a|
|(15) Contacts:||Michelle Coombs, Scientist-in-Charge, USGS email@example.com (907) 786-7497
David Fee, Coordinating Scientist, UAF firstname.lastname@example.org (907) 322-4085
|(16) Next Notice:|
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