Sigman
* The Arctic Moderator *
Mt. St. Augustine is a volcano is relatively close to Anchorage (171 miles), down around some of my favorite King Salmon fishing holes. The seismic activity has indicated for some time that an eruption could be near.
Excerpt from Alaska Volcano Observatory website:
"Wednesday, January 11, 2006, 9:40 AM Alaska Standard Time
Current Level of Concern Color Code: RED
Alaska Volcano Observatory recorded two discrete explosions at the summit of Augustine Volcano this morning at 4:44 a.m. and 5:13 a.m. (AST) and responded by changing the level of concern color code from ORANGE to RED.
There is no tsunami hazard associated with the current activity.
If the volcano follows a pattern similar to the 1976 and 1986 eruptions, we would expect a further intensification of seismic activity prior to similar or larger explosive events. It is also possible that an explosive eruption could occur with little or no warning.
Satellite data confirm that an ash cloud was produced and in collaboration with the National Weather Service (NWS), the height of the cloud was estimated at 30,000 feet above sea level. NWS and AVO are tracking the ash plume which has detached from the vent and is presently drifting to the north and east of Augustine. As of 7:40 a.m. (AST), the ash cloud had traveled 25 mi (40 km) east and 30 mi (50 km) north. An ash-fall advisory was issued by the NWS at 6:44 a.m. (AST). Seismicity has decreased significantly since the explosions, however, it is likely that stronger seismicity and further volcanic activity will resume."
Excerpt from Alaska Volcano Observatory website:
"Wednesday, January 11, 2006, 9:40 AM Alaska Standard Time
Current Level of Concern Color Code: RED
Alaska Volcano Observatory recorded two discrete explosions at the summit of Augustine Volcano this morning at 4:44 a.m. and 5:13 a.m. (AST) and responded by changing the level of concern color code from ORANGE to RED.
There is no tsunami hazard associated with the current activity.
If the volcano follows a pattern similar to the 1976 and 1986 eruptions, we would expect a further intensification of seismic activity prior to similar or larger explosive events. It is also possible that an explosive eruption could occur with little or no warning.
Satellite data confirm that an ash cloud was produced and in collaboration with the National Weather Service (NWS), the height of the cloud was estimated at 30,000 feet above sea level. NWS and AVO are tracking the ash plume which has detached from the vent and is presently drifting to the north and east of Augustine. As of 7:40 a.m. (AST), the ash cloud had traveled 25 mi (40 km) east and 30 mi (50 km) north. An ash-fall advisory was issued by the NWS at 6:44 a.m. (AST). Seismicity has decreased significantly since the explosions, however, it is likely that stronger seismicity and further volcanic activity will resume."
Last edited:
