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(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
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| (2) Issued: |
(20210420/1935Z) |
| (3) Volcano: |
Ukinrek Maars (VNUM #312131) |
| (4) Current Color Code: |
UNASSIGNED |
| (5) Previous Color Code: |
GREEN |
| (6) Source: |
Alaska Volcano Observatory |
| (7) Notice Number: |
2021/A177 |
| (8) Volcano Location: |
N 57 deg 50 min W 156 deg 30 min |
| (9) Area: |
Alaska Peninsula |
| (10) Summit Elevation: |
299 ft (91 m) |
| (11) Volcanic Activity Summary: |
The Alaska Volcano Observatory can no longer seismically monitor Ukinrek-Maars 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: |
Matt Haney, Acting Scientist-in-Charge, USGS
mhaney@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 |
AVO/USGS Volcanic Activity Notice
Volcano:
Ukinrek Maars (VNUM #312131)
Current Volcano Alert Level: UNASSIGNED
Previous Volcano Alert Level: NORMAL
Current Aviation Color Code: UNASSIGNED
Previous Aviation Color Code: GREEN
Issued: Tuesday, April 20, 2021, 11:35 AM AKDT
Source:
Alaska Volcano Observatory
Notice Number: 2021/A177
Location: N 57 deg 50 min W 156 deg 30 min
Elevation: 299 ft (91 m)
Area:
Alaska Peninsula
Volcanic Activity Summary: The Alaska Volcano Observatory can no longer seismically monitor Ukinrek-Maars 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: Matt Haney, Acting Scientist-in-Charge, USGS
mhaney@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.