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The U.S. Census Bureau calculates that as many as 460,000 people in 11 boroughs in Alaska, including Anchorage, could be affected by the volcanic ash fallout of Mount Redoubt ...
After strong tremors shook Mount Redoubt Thursday, scientists say seismic activity remains elevated.
Thursday held the strongest activity measured at the volcano since unrest started last week, the Alaska Volcano Observatory said.
Although the tremors have subsided somewhat, scientists said they are continuing at an elevated level and increased Friday afternoon.
The AVO said this is one more indication of nearing eruption
Source from AVO.
Gas and heat flux, combined with ongoing seismic activity, suggest that new magma has been emplaced within the crust below Redoubt and that it is actively degassing. We do not know the exact depths or volume of the magma; nor is it certain that the magma will continue to rise to the surface. On the basis of current activity, however, the most likely scenario is an eruption similar to or smaller than the 1989-90 eruption. It is somewhat less likely that no eruption will occur or that the volcano has an eruption larger than that of 1989-90.
ALASKA VOLCANO OBSERVATORY CURRENT STATUS REPORT
Sunday, February 8, 2009 11:56 AM AKST (Sunday, February 8, 2009 20:56 UTC)
REDOUBT VOLCANO (CAVW #1103-03-)
60°29'7" N 152°44'38" W, Summit Elevation 10197 ft (3108 m)
Current Aviation Color Code: ORANGE
Current Volcano Alert Level: WATCH
Unrest at Redoubt Volcano continues, though no eruption has yet occurred. Volcanic tremor is ongoing with variable amplitudes. Clear webcam images show a small steam plume.
Yesterday, observers on a gas-measurement flight reported continued steaming from the area around the 1989-90 lava dome, and continued water discharge along the Drift glacier. Gas data from the flight are still being processed.
AVO staff members continue to monitor the volcano 24 hours a day.
Redoubt Volcano has not erupted and unrest continues. A pilot reported seeing a white vertical steam plume. Volcanic tremor continues with variable amplitudes. A regional earthquake centered NW of Willow showed up on all of Redoubt's seismic stations
Unrest at Redoubt Volcano continues. No eruption has occurred.
Seismicity at the volcano remains elevated.
The unrest at Redoubt Volcano is continuing. Volcanic tremor continues to dominate the seismic activity.
The web camera continues to show variable steaming from the summit.