|(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)|
|(3) Volcano:||Tanaga (VNUM #311080)|
|(4) Current Color Code:||UNASSIGNED|
|(5) Previous Color Code:||GREEN|
|(6) Source:||Alaska Volcano Observatory|
|(7) Notice Number:||2021/A108|
|(8) Volcano Location:||N 51 deg 53 min W 178 deg 8 min|
|(10) Summit Elevation:||5925 ft (1806 m)|
|(11) Volcanic Activity Summary:||Low power likely due to snow cover has resulted in loss of operation and communication with all but two seismic stations on Tanaga. As a result, the Alaska Volcano Observatory can no longer locate earthquakes that could indicate unrest at Tanaga, and the Aviation Color Code and the Volcano Alert Level are now designated as UNASSIGNED. Additional seismic stations may come back online this spring as snowpack decreases.
Any eruptive activity or unrest may still be detected with the remaining seismic stations, in regional infrasound networks, through detection of lightning, and/or monitoring of satellite images.
|(12) Volcanic cloud height:||Unknown|
|(13) Other volcanic cloud information:||Unknown|
|(15) Contacts:||Matthew Haney, Acting Scientist-in-Charge, USGS
firstname.lastname@example.org (907) 786-7497
David Fee, Coordinating Scientist, UAFGI
email@example.com (907) 322-4085
|(16) Next Notice:|
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