Volcano Update from Archive



AVO/USGS Volcanic Activity Notice

Volcano: Veniaminof (CAVW #1102-07-)

Current Volcano Alert Level: ADVISORY
Previous Volcano Alert Level: NORMAL

Current Aviation Color Code: YELLOW
Previous Aviation Color Code: GREEN

Issued: Saturday, June 8, 2013, 10:12 AM AKDT (20130608/1812Z)
Source: Alaska Volcano Observatory
Notice Number: 2013/A13
Location: N 56 deg 11 min W 159 deg 23 min
Elevation: 8225 ft (2507 m)
Area: Alaska Peninsula Alaska

Volcanic Activity Summary: Over the past two days, AVO has detected gradually increasing seismic tremor beneath Veniaminof. We are therefore increasing the Aviation Color Code to Yellow and the Volcano Alert Level to Advisory.

Clear web-camera and satellite views currently show nothing unusual at the volcano. Similar seismic activity has been associated with ash emissions at Veniaminof in the past, most recently in 2005.

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

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 km3) and most active volcanic centers in the Aleutian Arc and has erupted at least 13 times in the past 200 years. Recent significant eruptions of the volcano occurred in 1993-95 and 2005. Both were moderate Strombolian eruptions producing intermittent low-level jets of incandescent lava fragments, and low-level emissions of steam and ash from the main intracaldera cone. During the 1993-95 activity, a small lava flow was extruded into the summit caldera ice field producing an ice pit. Minor ash-producing explosions occurred in 2002, 2004, early 2005, and early November 2006. Previous historical eruptions have produced ash plumes that reached 6,000 m (20,000 ft) above sea level and ash fallout that blanketed areas within about 40 km (25 mi) of the volcano.

Contacts: John Power, Scientist-in-Charge, USGS
jpower@usgs.gov (907) 786-7497

Jeff Freymueller, Coordinating Scientist, UAFGI
jeff.freymueller@gi.alaska.edu (907) 378-7556

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.
(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued:(20130608/1812Z)
(3) Volcano:Veniaminof (CAVW# 1102-07-)
(4) Current Color Code:YELLOW
(5) Previous Color Code:green
(6) Source:Alaska Volcano Observatory
(7) Notice Number:2013/A13
(8) Volcano Location:N 56 deg 11 min W 159 deg 23 min
(9) Area:Alaska Peninsula Alaska
(10) Summit Elevation:8225 ft (2507 m)
(11) Volcanic Activity Summary:Over the past two days, AVO has detected gradually increasing seismic tremor beneath Veniaminof. We are therefore increasing the Aviation Color Code to Yellow and the Volcano Alert Level to Advisory.

Clear web-camera and satellite views currently show nothing unusual at the volcano. Similar seismic activity has been associated with ash emissions at Veniaminof in the past, most recently in 2005.

(12) Volcanic cloud height:nil
(13) Other volcanic cloud information:nil
(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 km3) and most active volcanic centers in the Aleutian Arc and has erupted at least 13 times in the past 200 years. Recent significant eruptions of the volcano occurred in 1993-95 and 2005. Both were moderate Strombolian eruptions producing intermittent low-level jets of incandescent lava fragments, and low-level emissions of steam and ash from the main intracaldera cone. During the 1993-95 activity, a small lava flow was extruded into the summit caldera ice field producing an ice pit. Minor ash-producing explosions occurred in 2002, 2004, early 2005, and early November 2006. Previous historical eruptions have produced ash plumes that reached 6,000 m (20,000 ft) above sea level and ash fallout that blanketed areas within about 40 km (25 mi) of the volcano.
(15) Contacts:John Power, Scientist-in-Charge, USGS
jpower@usgs.gov (907) 786-7497

Jeff Freymueller, Coordinating Scientist, UAFGI
jeff.freymueller@gi.alaska.edu (907) 378-7556
(16) Next Notice:A new VONA will be issued if conditions change significantly or alert levels are modified. While a VONA is in effect, regularly scheduled updates are posted at
http://www.avo.alaska.edu