| (1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA) | |
| (2) Issued: | (20080827/2153Z) |
| (3) Volcano: | Okmok (CAVW# 1101-29-) |
| (4) Current Color Code: | YELLOW |
| (5) Previous Color Code: | |
| (6) Source: | Alaska Volcano Observatory |
| (7) Notice Number: | 2008/A28 |
| (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: | Seismicity at Okmok Volcano has been steadily declining for the past eight days and significant ash plumes have not been observed since August 19. Therefore AVO is lowering the aviation color code from Orange to Yellow and the Alert Level from Watch to Advisory. |
| (12) Volcanic cloud height: | Unknown |
| (13) Other volcanic cloud information: | Unknown |
| (14) Remarks: | Visual observations of the caldera floor made on August 23 indicate that low level eruptive activity has also likely stopped. It is possible for vigorous ash emissions to resume at any time. |
| (15) Contacts: | John Power, Acting Scientist-in-Charge, USGS jpower@usgs.gov (907) 786-7497 Steve McNutt, Coordinating Scientist, UAF steve@giseis.alaska.edu (907) 474-7131 |
| (16) 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 |
