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AVO/USGS Volcanic Activity Notice

Volcano: Veniaminof (CAVW #1102-07-)

Current Volcano Alert Level: WATCH

Current Aviation Color Code: ORANGE

Issued: Friday, August 30, 2013, 9:59 AM AKDT (20130830/1759Z)
Source: Alaska Volcano Observatory
Notice Number: 2013/A17
Location: N 56 deg 11 min W 159 deg 23 min
Elevation: 8225 ft (2507 m)
Area: Alaska Peninsula Alaska

Volcanic Activity Summary: Intense seismicity, lava fountaining, and ash emissions to 15,000 to 20,000 feet above sea level have been occurring at Veniaminof Volcano over the past several hours. The ongoing episode of activity is some of the strongest unrest detected so far during the eruption at the intracaldera cone of the volcano that began in early June. Although the activity at present is primarily lava fountaining and moderate ash emission, it is possible that conditions may continue to escalate, and higher rising, more ash rich plumes may be generated.

The ash plume associated with the current level of unrest is moving in a generally southerly direction and may result in trace amounts of ash fall on areas downwind of the volcano including Perryville and possibly the Chignik area. Ash fall amounts are not expected to be significant and likely will be less than 1/16 inch, although areas within 1-2 miles of the eruption site could receive thicker amounts of ash fall. More information about volcanic ash and the effects of ash fall can be found on the AVO web page (www.avo.alaska.edu), or by calling AVO at 907-786-7497.

AVO is monitoring the volcano closely and may issue additional information about the status of activity as needed throughout the day.

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

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:(20130830/1759Z)
(3) Volcano:Veniaminof (CAVW# 1102-07-)
(4) Current Color Code:ORANGE
(5) Previous Color Code:orange
(6) Source:Alaska Volcano Observatory
(7) Notice Number:2013/A17
(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:Intense seismicity, lava fountaining, and ash emissions to 15,000 to 20,000 feet above sea level have been occurring at Veniaminof Volcano over the past several hours. The ongoing episode of activity is some of the strongest unrest detected so far during the eruption at the intracaldera cone of the volcano that began in early June. Although the activity at present is primarily lava fountaining and moderate ash emission, it is possible that conditions may continue to escalate, and higher rising, more ash rich plumes may be generated.

The ash plume associated with the current level of unrest is moving in a generally southerly direction and may result in trace amounts of ash fall on areas downwind of the volcano including Perryville and possibly the Chignik area. Ash fall amounts are not expected to be significant and likely will be less than 1/16 inch, although areas within 1-2 miles of the eruption site could receive thicker amounts of ash fall. More information about volcanic ash and the effects of ash fall can be found on the AVO web page (www.avo.alaska.edu), or by calling AVO at 907-786-7497.

AVO is monitoring the volcano closely and may issue additional information about the status of activity as needed throughout the day.
(12) Volcanic cloud height:Unknown
(13) Other volcanic cloud information:Unknown
(14) 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
(15) 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
VOLCANO ALERT LEVELS
NORMAL
Volcano is in typical background, noneruptive state or, after a change from a higher level, volcanic activity has ceased and volcano has returned to noneruptive background state.
ADVISORY
Volcano is exhibiting signs of elevated unrest above known background level or, after a change from a higher level, volcanic activity has decreased significantly but continues to be closely monitored for possible renewed increase.
WATCH
Volcano is exhibiting heightened or escalating unrest with increased potential of eruption, timeframe uncertain, OR eruption is underway but poses limited hazards.
WARNING
Hazardous eruption is imminent, underway, or suspected.
AVIATION COLOR CODES
GREEN
Volcano is in typical background, noneruptive state or, after a change from a higher level, volcanic activity has ceased and volcano has returned to noneruptive background state.
YELLOW
Volcano is exhibiting signs of elevated unrest above known background level or, after a change from a higher level, volcanic activity has decreased significantly but continues to be closely monitored for possible renewed increase.
ORANGE
Volcano is exhibiting heightened or escalating unrest with increased potential of eruption, timeframe uncertain, OR eruption is underway with no or minor volcanic-ash emissions [ash-plume height specified, if possible].
RED
Eruption is imminent with significant emission of volcanic ash into the atmosphere likely OR eruption is underway or suspected with significant emission of volcanic ash into the atmosphere [ash-plume height specified, if possible].
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URL: www.avo.alaska.edu/activity/avoreport.php
Page modified: May 16, 2014 09:40
Contact Information: AVO Web Team

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