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Kasatochi volcano (Aleutian Islands), activity update: major ash explosions

Saturday Aug 09, 2008 11:44 AM | Age: 4 yrs

Three major explosive eruptions occured at Kasatochi between approximately 2230 UTC (14:30 AKDT) on 07 August and 0500 UTC on 08 August(2100 AKDT on 07 August). Ash from these explosions reached at least 45,000 ft above sea level. Ash emissions became continuous following the last explosive event and have produced a continuous ash cloud extending for more than 500 miles in a counterclockwise spiral. Ash from this continuous phase is likely at an altitude in excess of 35,000 ft above sea level. The possibility of larger explosive events continues.
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From: Alaska Volcano Observatory, Current Status Report,Friday, August 8, 2008
Previous news
Friday, Aug 08, 2008
A subplinian or plinian eruption is taking place at Kasatochi volcano, a remote island in the Western Aleutian chain. AVO reports that satellite data ... [more]
View of Okmok's ash plume emitting from multiple vents near intracaldera Cone D, taken at about 1:30 pm on August 3, 2008 by Jessica Larsen.
Tuesday, Aug 05, 2008
Ash emissions emitting plumes reaching several kilometers height continue at Okmok volcano. [more]
Thursday, Jul 24, 2008
On 19 July, activity at Okmok increased as interpreted from seismicity. Possibly, ash plumes rose to altitudes of 7.6-9.1 km (25,000-30,000 ft)... [more]
image showing the extent of the sulfur dioxide gas cloud from the eruption of Okmok Volcano. The large red mass is from the main explosive phase on 12 July at 2130 UTC and is at an estimated height of 50,000 ft above sea level. The north-south dimension of this cloud is about 850 miles. Current emissions from the volcano are at a lower altitude of approximately 30,000 to 35,000 feet. Other OMI data (not shown) indicate that volcanic ash is mixed with the sulfur dioxide cloud.
Wednesday, Jul 16, 2008
Okmok Volcano continues to erupt. Seismicity, though below this weekend's intensity, has remained steady over the last 24 hours. Satellite data contin... [more]
Monday, Jul 14, 2008
The strong eruption at Okmok continues based on ongoing seismic activity and satellite observations. Ash emissions continue reaching altitudes of 30,0... [more]