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2009-03-21 13:23:38 - Status Report
Shallow earthquake activity under the volcano that began yesterday continues. Activity is primarily seen on the stations nearest the summit, though some events are also recorded at farther-out stations. A steam plume rising as high as approximately a thousand feet above the volcano is visible on the web cameras, but no explosive or ash activity such as occurred last Sunday has been identified. AVO is watching the activity closely but remaining at Yellow/Advisory at this time.
It is still possible for unrest at the volcano to change rapidly, and seismic activity or other signs of unrest could escalate over time periods as short as 24 hours or less. Minor explosive activity such as was seen March 15 could occur with little or no warning.
A field crew at the volcano today installed one non-telemetered seismometer and will try for a second later this afternoon.
2009-03-21 22:09:44 - VAN/VONA
AVO is raising the aviation color code to Orange and the alert level to Watch. Seismic activity has continued to increase and conditions may evolve rapidly culminating in an eruption within days to weeks.
2009-03-22 08:45:06
Seismicity rates have increased dramatically over the last 48 hours. Currently, the earthquake rate is about 40 to 50 events per hour. Many of these events are large enough to be recorded at the more distal stations of the Redoubt network, including NCT and DFR.
The first webcam images of the morning are cloudy and the lens show some snow and ice build up.
2009-03-22 12:49:06 - Status Report
AVO raised the aviation color code to Orange and the alert level to Watch last night at 10:09PM AKDT (March 21) based on an increase in the rate of discrete seismic events. Shallow earthquake activity under the volcano has been as high as 26 events per 10-minute period. Activity is primarily seen on the stations nearest the summit, though some events are also recorded at farther-out stations. This activity likely represents either the upward movement of magma or pressurization of the system. No eruption has occurred.
It is possible for unrest at the volcano to change rapidly, and seismic activity or other signs of unrest could escalate culminating in an eruption within days to weeks.
2009-03-22 21:32:08 Over the last two hours, seismicity at Redoubt has increased significantly. No eruption has yet occurred, however at these heightened levels of seismicity, there could be a quick escalation to eruptive activity.
2009-03-22 23:05:18 An eruption is occurring. We will post more information as we interpret the data.