AVO/USGS Volcanic Activity Notice

Volcano: Okmok (VNUM #311290)

Current Volcano Alert Level: WATCH
Previous Volcano Alert Level: WARNING

Current Aviation Color Code: ORANGE
Previous Aviation Color Code: RED

Issued: Sunday, July 20, 2008, 11:02 PM AKDT
Source: Alaska Volcano Observatory
Notice Number:
Location: N 53 deg 23 min W 168 deg 9 min
Elevation: 3520 ft (1073 m)
Area: Aleutians

Volcanic Activity Summary: The aviation color code for Okmok Volcano has been lowered from RED to ORANGE. The volcano alert level has been lowered from WARNING to WATCH. The eruption of Okmok Volcano continues. Seismicity has changed from nearly continuous volcanic tremor to a more episodic character, and the overall seismic intensity has declined over the past 14 hours. The most recent satellite imagery indicates an intermittent ash plume is rising to 15,000 to 20,000 ft above sea level. Reports from pilots indicate a plume of ash and steam is reaching roughly 15,000 ft. above sea level.

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