******************************************************************* From: Simon Carn <scarn@xxxxxxx> ******************************************************************* Dear all, Satellite instruments detected an eruption in northern Afar, Ethiopia on November 3. The eruption first manifested itself as a large sulfur dioxide (SO2) cloud drifting eastwards over the Arabian peninsula, detected by the Ozone Monitoring Instrument (OMI) and the Atmospheric Infrared Sounder (AIRS). MODIS data from the University of Hawaii's MODVOLC hot-spot monitoring tool (http://modis.higp.hawaii.edu) confirmed an extensive hot-spot (presumably lava flows) near Alu volcano, in the northern part of the Erta 'Ale range. Details are still sketchy and these observations are as yet unconfirmed from the ground. A total of 0.1-0.2 Tg of SO2 was measured in the eruption cloud by OMI at ~1100 UT on November 4, by which time the SO2 cloud had reached southern Iran. Using the OMI SO2 data and radiosonde soundings, observed SO2 cloud drift yields a preliminary estimate of the eruption onset time of 1400-1600 UT on November 3. Near real-time OMI SO2 data can be viewed at: http://satepsanone.nesdis.noaa.gov/pub/OMI/OMISO2/index.html Best regards, Simon ============================================================== To unsubscribe from the volcano list, send the message: signoff volcano to: listserv@xxxxxxx, or write to: volcano-request@xxxxxxxx To contribute to the volcano list, send your message to: volcano@xxxxxxxx Please do not send attachments. ==============================================================
