(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued:	(20210420/0019Z)
(3) Volcano:	Ugashik-Peulik (VNUM #312130)
(4) Current Color Code:	UNASSIGNED
(5) Previous Color Code:	GREEN
(6) Source:	Alaska Volcano Observatory
(7) Notice Number:	2021/A176
(8) Volcano Location:	N 57 deg 45 min W 156 deg 22 min
(9) Area:	Alaska Peninsula
(10) Summit Elevation:	4836 ft (1474 m)
(11) Volcanic Activity Summary:	The Alaska Volcano Observatory can no longer seismically monitor Ugashik-Peulik because of seismic station outages. As a result, AVO is unable to assess seismic unrest at this volcano. Because it is no longer seismically monitored, AVO will move from volcano alert level NORMAL and aviation color code GREEN to "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
(14) Remarks:
(15) Contacts:	Aaron Wech, Acting Scientist-in-Charge, USGS awech@usgs.gov (907) 786-7497 Jessica Larsen, Acting Coordinating Scientist, UAF jflarsen@alaska.edu (907) 322-4085
(16) Next Notice:	A new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http://www.avo.alaska.edu

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AVO/USGS Volcanic Activity Notice

Volcano: Ugashik-Peulik (VNUM #312130)

Current Volcano Alert Level: UNASSIGNED
Previous Volcano Alert Level: NORMAL

Current Aviation Color Code: UNASSIGNED
Previous Aviation Color Code: GREEN

Issued: Monday, April 19, 2021, 4:19 PM AKDT
Source: Alaska Volcano Observatory
Notice Number: 2021/A176
Location: N 57 deg 45 min W 156 deg 22 min
Elevation: 4836 ft (1474 m)
Area: Alaska Peninsula

Volcanic Activity Summary: The Alaska Volcano Observatory can no longer seismically monitor Ugashik-Peulik because of seismic station outages. As a result, AVO is unable to assess seismic unrest at this volcano. Because it is no longer seismically monitored, AVO will move from volcano alert level NORMAL and aviation color code GREEN to "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.

Recent Observations:
[Volcanic cloud height] Unknown
[Other volcanic cloud information] Unknown

Contacts: Aaron Wech, Acting Scientist-in-Charge, USGS
awech@usgs.gov (907) 786-7497

Jessica Larsen, Acting Coordinating Scientist, UAF
jflarsen@alaska.edu (907) 322-4085

Next Notice: A new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at
http://www.avo.alaska.edu

The Alaska Volcano Observatory is a cooperative program of the U.S. Geological Survey, the University of Alaska Fairbanks Geophysical Institute, and the Alaska Division of Geological and Geophysical Surveys.

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