Mt. Fitzherbert

Fieldwork photos taken on 2005-Apr-10

Potential ash hazards: Wind forecasts from the National Oceanic and Atmospheric Administration (NOAA), coupled with eruption models, show that any ash clouds that rise above the crater rim today would drift north-northeastward to eastward.

Recent observations: Seismicity has been relatively low the past several days, but imagery indicates that the dome is still extruding at a substantial rate and continuing to fracture. Yesterday, crews replaced a defective seismometer station in the crater and repaired radio communication systems. When weather permits, crews will conduct a gas-sensing flight, dredge rock samples from the dome, and take aerial photographs.

Also new:

Graph showing relationship between time and depth of earthquakes beneath Mount St. Helens from March 2004 through March 2005.