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2004 December 07

USGS Update 2004-Dec-07 09:50

Wind forecasts from the National Oceanic and Atmospheric Administration (NOAA), coupled with eruption models, show that ash clouds that rise above the crater rim today would drift northeastward early in the day, and eastward later in the day.

Recent observations: Within the past 24 hours, two large (about M2.5-3) earthquakes occurred amidst the ongoing sequence of smaller (mostly less than M1.5) earthquakes. These earthquakes are similar to other large quakes that have occurred episodically over the past several weeks, and represent nothing unusual in the expected sequence of events accompanying lava-dome growth. No field work was undertaken yesterday and none is planned today. Poor weather has prevented recent observations and field work. In the coming days, field crews will conduct visual and hydrological observations, replace and maintain seismic equipment, and attempt gas and thermal-imaging measurements as weather permits.