|
(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
|
| (2) Issued: |
(20210708/1838Z) |
| (3) Volcano: |
Veniaminof (VNUM #312070) |
| (4) Current Color Code: |
GREEN |
| (5) Previous Color Code: |
UNASSIGNED |
| (6) Source: |
Alaska Volcano Observatory |
| (7) Notice Number: |
2021/A463 |
| (8) Volcano Location: |
N 56 deg 11 min W 159 deg 23 min |
| (9) Area: |
Alaska Peninsula |
| (10) Summit Elevation: |
8225 ft (2507 m) |
| (11) Volcanic Activity Summary: |
The Alaska Volcano Observatory is moving the status of Veniaminof Volcano from UNASSIGNED/UNASSIGNED to GREEN/NORMAL. Recent field operations were successful in restoring seismic stations on Veniaminof allowing AVO to resume monitoring potential activity at the volcano. |
| (12) Volcanic cloud height: |
n/a |
| (13) Other volcanic cloud information: |
n/a |
| (14) Remarks: |
Mount Veniaminof volcano is an andesitic stratovolcano with an ice-filled 10-km diameter summit caldera located on the Alaska Peninsula, 775 km (480 mi) southwest of Anchorage and 35 km (22 mi) north of Perryville. Veniaminof is one of the largest (~300 cubic km; 77 cubic mi) and most active volcanic centers in the Aleutian Arc and has erupted at least 14 times in the past 200 years. Recent eruptions in 1993-95, 2005, 2013, and 2018 all occurred at the intracaldera cone and lasted for several months. These eruptions produced lava spattering and fountaining, minor emissions of ash and gas, and small lava flows into intracaldera icefield. Minor ash-producing explosions occurred nearly annually between 2002 and 2010. Previous historical eruptions have produced ash plumes that reached 15,000 to 20,000 ft above sea level (1939, 1956, and 2018) and ash fallout that blanketed areas within about 40 km (25 mi) of the volcano (1939, 2018). |
| (15) Contacts: |
Michelle Coombs, Scientist-in-Charge, USGS mcoombs@usgs.gov (907) 786-7497
David Fee, Coordinating Scientist, UAF dfee1@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:
Veniaminof (VNUM #312070)
Current Volcano Alert Level: NORMAL
Previous Volcano Alert Level: UNASSIGNED
Current Aviation Color Code: GREEN
Previous Aviation Color Code: UNASSIGNED
Issued: Thursday, July 8, 2021, 10:38 AM AKDT
Source:
Alaska Volcano Observatory
Notice Number: 2021/A463
Location: N 56 deg 11 min W 159 deg 23 min
Elevation: 8225 ft (2507 m)
Area:
Alaska Peninsula
Volcanic Activity Summary: The Alaska Volcano Observatory is moving the status of Veniaminof Volcano from UNASSIGNED/UNASSIGNED to GREEN/NORMAL. Recent field operations were successful in restoring seismic stations on Veniaminof allowing AVO to resume monitoring potential activity at the volcano.
Recent Observations:
[Volcanic cloud height] n/a
[Other volcanic cloud information] n/a
Remarks: Mount Veniaminof volcano is an andesitic stratovolcano with an ice-filled 10-km diameter summit caldera located on the Alaska Peninsula, 775 km (480 mi) southwest of Anchorage and 35 km (22 mi) north of Perryville. Veniaminof is one of the largest (~300 cubic km; 77 cubic mi) and most active volcanic centers in the Aleutian Arc and has erupted at least 14 times in the past 200 years. Recent eruptions in 1993-95, 2005, 2013, and 2018 all occurred at the intracaldera cone and lasted for several months. These eruptions produced lava spattering and fountaining, minor emissions of ash and gas, and small lava flows into intracaldera icefield. Minor ash-producing explosions occurred nearly annually between 2002 and 2010. Previous historical eruptions have produced ash plumes that reached 15,000 to 20,000 ft above sea level (1939, 1956, and 2018) and ash fallout that blanketed areas within about 40 km (25 mi) of the volcano (1939, 2018).
Contacts: Michelle Coombs, Scientist-in-Charge, USGS mcoombs@usgs.gov (907) 786-7497
David Fee, Coordinating Scientist, UAF dfee1@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.