International Glaciospeleological Survey
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U.S. Geological Survey, Vancouver, Washington Mount St. Helens Daily Update 9/28/04 6:30 PM PDT Throughout the day seismic activity has remained at a fairly constant, but high, rate of about 2 small (less than magnitude 2) earthquakes per minute. All earthquake locations are still shallow and in or below the lava dome. A USGS field crew continued their deployment of GPS equipment today in order to monitor any ground movement on the lava dome, crater floor, or lower slopes of the volcano. Tomorrow’s field work includes continued GPS deployments and another gas flight. USGS and PNSN personnel held a teleconference to discuss scientific issues and future needs. USGS and PNSN personnel also participated in a teleconference with Washington State and County emergency-management officials to discuss hazard and response issues. |
