(2) Issued:(20080802/1242Z)
(3) Volcano:Okmok (CAVW# 1101-29-)
(4) Current Color Code:RED
(5) Previous Color Code:
(6) Source:Alaska Volcano Observatory
(7) Notice Number:2008/A19
(8) Volcano Location:N 53 deg 23 min W 168 deg 9 min
(9) Area:Aleutians Alaska
(10) Summit Elevation:3520 ft (1073 m)
(11) Volcanic Activity Summary:Strong volcanic tremor has returned to Okmok. Tremor amplitudes began to climb at around 04:05 AKDT (12:05 UTC) and have remained high since. In the past, tremor of this amplitude usually indicates the potential for strong explosive activity with ash plumes exceeding 30,000 ft ASL. No satellite data collected since the elevated tremor began are currently available.
(12) Volcanic cloud height:Unknown
(13) Other volcanic cloud information:Unknown
(14) Contacts:Chris Waythomas, Acting Scientist-in-Charge, USGS
chris@usgs.gov, (907)786-7497

Jon Dehn, Acting Coordinating Scientist, UAFGI
dehn@gi.alaska.edu (907) 474-6499

(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