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VOLCANO ACTIVITY NOTIFICATIONS

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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: Friday, February 22, 2008, 12:27 PM AKST (20080222/2127Z)
Source: Alaska Volcano Observatory
Notice Number: 2008/A4
Location: N 56 deg 11 min W 159 deg 23 min
Elevation: 8225 ft (2507 m)
Area: Alaska Peninsula Alaska

Volcanic Activity Summary: Several minor bursts of ash from Veniaminof were observed on AVO Webcam images and recorded in seismic data this morning. The bursts rose less than 9,000 ft ASL (only a few hundred feet above the active intracaldera cinder cone), and were confined to the caldera.

AVO is raising the Aviation color code to Yellow and the Alert Level to Advisory.

AVO will continue to monitor activity at Mount Veniaminof using seismic data, satellite images, internet camera data and observer reports.

Recent Observations:
[Monitoring report] Sporadic increases in seismic activity have been noted since February 11, including bursts of tremor lasting 1-2 minutes occurring several times per hour. Seismic activity today includes events at the same times as the observed ash bursts. Several of the seismic events are stronger than those observed over the previous ten days, and are similar to signals observed during eruptions in 2005.

Hazard Analysis:
[General hazards] There are no indications that more vigorous activity is imminent or even likely. These small ash bursts are typical of activity at Veniaminof over the past several years. We expect that steam and ash emissions similar to those observed today may continue intermittently and could pose a hazard to people and low-flying aircraft in the vicinity of the active cone.

Remarks: Please see http://www.avo.alaska.edu/activity/Veniaminof.php for more information.

Contacts: Christina Neal, Acting Scientist-in-Charge, USGS tneal@usgs.gov (907) 786-7497 or Steve McNutt, Coordinating Scientist, UAFGI steve@giseis.alaska.edu (907) 474-7131

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.


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: Friday, February 22, 2008, 12:27 PM AKST (20080222/2127Z)
Source: Alaska Volcano Observatory
Notice Number: 2008/A4
Location: N 56 deg 11 min W 159 deg 23 min
Elevation: 8225 ft (2507 m)
Area: Alaska Peninsula Alaska

Volcanic Activity Summary: Several minor bursts of ash from Veniaminof were observed on AVO Webcam images and recorded in seismic data this morning. The bursts rose less than 9,000 ft ASL (only a few hundred feet above the active intracaldera cinder cone), and were confined to the caldera.

AVO is raising the Aviation color code to Yellow and the Alert Level to Advisory.

AVO will continue to monitor activity at Mount Veniaminof using seismic data, satellite images, internet camera data and observer reports.

Recent Observations:
[Monitoring report] Sporadic increases in seismic activity have been noted since February 11, including bursts of tremor lasting 1-2 minutes occurring several times per hour. Seismic activity today includes events at the same times as the observed ash bursts. Several of the seismic events are stronger than those observed over the previous ten days, and are similar to signals observed during eruptions in 2005.

Hazard Analysis:
[General hazards] There are no indications that more vigorous activity is imminent or even likely. These small ash bursts are typical of activity at Veniaminof over the past several years. We expect that steam and ash emissions similar to those observed today may continue intermittently and could pose a hazard to people and low-flying aircraft in the vicinity of the active cone.

Remarks: Please see http://www.avo.alaska.edu/activity/Veniaminof.php for more information.

Contacts: Christina Neal, Acting Scientist-in-Charge, USGS tneal@usgs.gov (907) 786-7497 or Steve McNutt, Coordinating Scientist, UAFGI steve@giseis.alaska.edu (907) 474-7131

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.
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: January 21, 2016 16:41
Contact Information: AVO Web Team

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