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2009-05-05 10:14:15

Seismic and rockfall activity remains at an heightened level. Explosive eruption likely in coming days; could occur at any time with little or no warning.

The growing lava dome is becoming increasingly unstable and should a dome failure occur it likely would result in a significant explosion producing high altitude (>30,000 ft ASL) ash plumes, trace to minor ash fall in parts of south-central Alaska, lahars in the Drift River Valley, and pyroclastic flows in the immediate vicinity of the volcano.

AVO continues 24/7 operations and is monitoring the situation closely.

2009-05-05 18:12:19
Over the last 2 hours, seismic activity has consisted primarily of repetitive events occurring several times per minute as well as more continuous volcanic tremor. Similar seismicity was observed prior to the Redoubt explosions in March and April 2009. AVO is monitoring the situation closely and the observatory is staffed 24 per hours day.

2009-05-05 06:59:43 - VAN/VONA
Current activity at Redoubt volcano suggests that a significant explosive event is likely, though not certain, in the coming days. This event could occur at any time with little or no warning. Since about May 2 shallow earthquake activity beneath the actively growing lava dome of Redoubt volcano has been slowly increasing. The growing lava dome is becoming increasingly unstable.

Should a significant explosion occur, the event will likely produce high altitude (>30,000 ft ASL) ash plumes, trace to minor ash fall in parts of south-central Alaska, lahars in the Drift River Valley, and pyroclastic flows in the immediate vicinity of the volcano.

AVO continues 24/7 operations and is monitoring the situation closely. AVO will provide frequent updates of the volcano's status and the earliest possible warning of significant explosive activity and other hazardous phenomena.

Gas emissions measured on Monday showed a steep decline since last measured on May 14.

Queso wrote:Mt Spurr, ya up for another round yet?

ANCFlyer wrote:almost cancelled a Honolulu trip

Queso wrote:

ANCFlyer wrote:almost cancelled a Honolulu trip

Don't you have another Hawaii trip coming up?

ANCFlyer wrote:

Queso wrote:

ANCFlyer wrote:almost cancelled a Honolulu trip

Don't you have another Hawaii trip coming up?

Yes, Yes i do 8/20/09, so STFU.

Tornado82 wrote:We're up there 16th-23rd.

Continued low seismicity, reduced gas emissions, and lack of observable growth in the lava dome suggest that the 2009 eruption of Redoubt may be drawing to a close. Due to this consistent trend in the data, AVO lowered Redoubt's Aviation Color Code from Orange to Yellow, and the Alert Level from Watch to Advisory on Tuesday, June 30. The 1 km-long lava dome at the summit, however, remains potentially unstable. Collapse of the lava dome would likely result in high-level ash production, hot lava block and ash flows, and possible flooding in the Drift River valley.

Web camera views, when clear, show continued steaming at the summit.

AVO scientists conducted field work at Redoubt this week, including measuring gas emissions from the steam and gas plume, observing the lava dome, collecting thermal imagery of the dome, and maintaining field equipment.

AVO will continue to monitor Redoubt's activity closely, but will begin to transition off of 24/7 staffing.