Printer friendly versionAVO/USGS Volcanic Activity Notice
Current Volcano Alert Level: WATCH
Previous Volcano Alert Level: WARNING
Current Aviation Color Code: ORANGE
Previous Aviation Color Code: REDIssued
: Wednesday, July 30, 2008, 10:34 AM AKDT (20080730/1834Z)Source
: Alaska Volcano ObservatoryNotice Number
: N 53 deg 25 min W 168 deg 7 minElevation
: 3520 ft (1073 m)Area
: Aleutians AlaskaVolcanic Activity Summary
: Satellite images and recent pilot reports indicate the ash plume at Okmok has decreased to altitudes between 15,000 and 20,000 ft and is moving west from the volcano. Seismicity continues to alternate between periods of continuous and pulsating tremor. The pulses continue to be identified on seismometers on Makushin Volcano on Unalaska Island. Based on these observations AVO is lowering the aviation color code at Okmok volcano to ORANGE
and the Alert Code to WATCH.
Stronger explosive activity could resume at any time with little or no warning.Hazard Analysis
[Ash fall] Minor ashfall may occur around the caldera, on the eastern portions of Umnak Island, and to the southeast of the island.
[Ash cloud] Forecast winds predict the ash cloud will move generally to the West.Remarks
: Please see http://www.avo.alaska.edu/activity/Okmok.php
for more information.Contacts
: John Power, Acting Scientist-in-Charge, USGS
Steve McNutt, Coordinating Scientist, UAFGI
email@example.com (907)978-5458Next 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.