********************************** Augustine Volcano eruption update ********************************** Alaska Volcano Observatory Information Updates, Jan. 28 and 29, 2006 VOLCANO INFORMATION ON THE INTERNET: http://www.avo.alaska.edu RECORDING ON THE STATUS OF ALASKA'S VOLCANOES (907) 786-7478 ALASKA VOLCANO OBSERVATORY INFORMATION RELEASE Saturday, January 28, 2006 8:45 AM AKST (1745 UTC) AUGUSTINE VOLCANO (CAVW#1103-01-) 59.3633°N 153.4333°W, Summit Elevation 4134 ft (1260 m) Current Level of Concern Color Code: RED Four explosive eruptions have occurred in the last 12 hours. The first began at 20:24 AKST 27 January (0524 UTC 28 January) and had a total duration of 9 minutes. According to the National Weather Service (NWS), an ash cloud reached a maximum height of around 30,000 feet above sea level (asl) and drifted southeast. The second occurred at 23:37 AKST 27 January (0837 UTC 28 January) and had a duration of 1 minute. No ash was detected above 10,000 feet after this event. The third occurred at 02:04 AKST (1104 UTC) 28 January and had a duration of 2 minutes. Ash drifted SE at a height of up to 26,000 feet (NWS). The fourth occurred at 07:42 AKST (1642 UTC) 28 January and had a duration of 3 minutes. The ash cloud drifted NE at a maximum height of 25,000 feet (NWS). Ashfall advisories are issued by NWS and the most up to date information can be found at http://pafc.arh.noaa.gov/augustine.php. AUGUSTINE VOLCANO (CAVW#1103-01-) 59.3633°N 153.4333°W, Summit Elevation 4134 ft (1260 m) Current Level of Concern Color Code: RED Another explosive event at Augustine Volcano began today at 14:30 AST (23:30 UTC) with a small discrete explosion. The seismic activity continues and is consistent with continuous ash emission, which has also been observed in web camera images. On the basis of current satellite imagery, the National Weather Service has reported ash to 30,000 ft above sea level travelling south-southwest. The strength of the seismic signals is smaller than for previous explosive events in this eruptive sequence, including those from last night. The first explosive event last night at 8:24 PM AST destroyed two seismic stations and one continuous GPS station. AVO still has four seismometers and three GPS stations operational on the island which allow us to monitor volcanic activity. Satellite imagery from this morning indicates a widespread thermal anomaly to the north of the summit that is likely the result of pyroclastic flow deposits. For current ash fall advisories and wind trajectories, refer to the National Weather Service website: http://pafc.arh.noaa.gov/augustine.php ALASKA VOLCANO OBSERVATORY INFORMATION RELEASE Sunday, January 29, 2006 2:05 AM AKST (1105 UTC) AUGUSTINE VOLCANO (CAVW#1103-01-) 59.3633°N 153.4333°W, Summit Elevation 4134 ft (1260 m) Current Level of Concern Color Code: RED Following the explosion and subsequent ash emission that occurred at 14:30 AKST (2330 UTC) January 28, the volcano has been in a state of continuous eruption, accompanied by persistent ash emission. Since 20:19 AKST January 28 (0519 January 29 UTC) the level of background seismicity increased further, and short-lived, larger pulses have been occurring at intervals. Ash emission is likely ongoing. National Weather Service radar has tracked an ash-rich plume drifting towards the south (extending over Kodiak Island) at up to 14,000 feet above sea level. Satellite imagery indicates a thermal anomaly near the summit of the volcano. Please refer to our hourly updates for the most recent information on volcanic activity. For current ash fall advisories and wind trajectories, refer to the National Weather Service website: http://pafc.arh.noaa.gov/augustine.php. ============================================================== 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. ==============================================================
