Redoubt: AVO lowers alert levels, Drift River oil removed 7 April 2009Posted by admin in activity reports, Alaska, eruptions, natural hazards, Redoubt, United States.
Tags: Alaska, Drift River, natural hazards, Redoubt, United States, volcanic activity reports, volcanic eruptions
The Alaska Volcano Observatory reports no change at Redoubt, with the lava dome busily growing, low-level tremor and occasional small earthquakes, and a continuous steam plume to under 4500 metres (15000 feet).
The alert level was lowered yesterday afternoon to Orange/Watch. The AVO’s Volcanic Activity Notice about this change (2009-04-06 14:55:36) reports:
The eruption of Redoubt continues with varying intensity of ash and lava production from the summit crater. Additional significant explosive events with accompanying ash clouds, ash fall, and mudflows are possible and can occur with little or no warning. Visual, satellite, and seismic observations indicate that a lava dome is again forming in the summit crater.
The character of current seismicity suggests that a sudden explosive eruption is not imminent. Present levels of activity are emitting only a very minor amount of ash that poses a hazard of limited aerial extent. Consequently, AVO is lowering the Aviation Color Code to ORANGE and the Alert Level to WATCH. AVO will maintain 24/7 operations in order to quickly detect renewed significant explosive activity and other hazardous phenomena.
It seems that the transfer of some of the oil in the Drift River Oil Terminal tanks has been completed. The Anchorage Daily News (which has provided excellent coverage of this issue) reports that the tanker Seabulk Arctic completed taking on 3.7 million gallons of crude on Monday and has departed for Nikiski terminal where the oil will be delivered. About 2.5 million gallons of oil and sludge remains at Drift River.
The Cook Inletkeeper site has more information about the Drift River Oil Terminal situation here.
For all our Redoubt coverage: Redoubt « The Volcanism Blog.
Drift River oil moved: alert level lowered – Anchorage Daily News, 6 April 2009
Global Volcanism Program: Redoubt – summary information for Redoubt (1103-03-)
Alaska Volcano Observatory – Redoubt – AVO information and updates for Redoubt
Alaska Volcano Observatory – main page for the AVO