In three comments below, Scott Bachmeier of CIMSS has identified a visible plume in the GOES imagery crossing the US northwest yesterday.
The Okmok volcano erupted on July 12.
CALIPSO has an overpass yesterday at 9:00 UTC which should correspond to this plume. It may be the feature which is identified in the CALIPSO cross-section at 5-6 km.
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The UMBC OMI SO2 website has the plume in the same location as the GOES page.
Posted by Ray Hoff at July 18, 2008 11:41 AM