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ARCHIVED REPORT
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ALASKA VOLCANO OBSERVATORY


Information Release


Thursday, November 8, 2007 2:25 PM AKST (2325 UTC)




AVO IMPLEMENTS NEW VOLCANO HAZARD NOTIFICATIONS FOR VOLCANIC ACTIVITY



The Alaska Volcano Observatory is implementing a new format for written notices of volcanic activity.



AVO will now issue a Volcanic Activity Notice (VAN) to announce eruptions, other significant activity, and alert level and color code changes for Alaskan volcanoes. For our aviation customers, a Volcano Observatory Notification for Aviation (VONA) will be offered. Daily status reports and weekly summaries will remain largely unchanged. Information Releases will be replaced by Information Statements.



These messages will be available via an e-mail subscription service at some time in the near future. They will also be posted to our web site.



The intent of this change is to provide a clearer and more consistent statement of volcano hazard information. It is our hope that the more structured format of the VAN and VONA will enable users to more quickly find the hazard content of most interest.



We will evaluate these new message protocols over the next several months and make changes as needed.





AVO VOLCANO INFORMATION PRODUCTS



VAN: Volcanic Activity Notice

Important announcement of volcanic activity or significant change in activity, aviation color code, or alert level.



VONA: Volcano Observatory Notice for Aviation

Highly formatted message focusing on ash cloud hazards.



DAILY STATUS REPORT:

Short statement on the status of volcanoes at elevated aviation color code or alert level.



WEEKLY SUMMARY:

A recap of activity over the past week and current status of monitored volcanoes.



INFORMATION STATEMENT:

Expanded background information, hazard scenarios, announcements of new monitoring benchmarks, etc.







Please see http://volcanoes.usgs.gov/2006/vhpalertlevel.pdf for a complete description of alert levels and color codes.



VOLCANO INFORMATION ON THE INTERNET: http://www.avo.alaska.edu

RECORDING ON THE STATUS OF ALASKA'S VOLCANOES (907) 786-7478



CONTACT INFORMATION:

Tom Murray Scientist-in-Charge, USGS

tlmurray@usgs.gov (907) 786-7497



Steve McNutt, Coordinating Scientist, UAF

steve@giseis.alaska.edu (907) 474-7131



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].

PDF version of these definitions
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URL: avo.alaska.edu/activity/avoreport_archives.php
Page modified: May 27, 2014 10:23
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