Mt. Fitzherbert

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

Recent observations: Small earthquakes accompanying lava dome extrusion continue to occur every 1-2 minutes, punctuated by occasional rockfall signals on seismic records. The largest rockfalls produce small ash clouds that occasionally escape from the crater. Time-lapse photographs of the east face of the lava dome show that it is extruding at a rate of about 1.5 meters per day, consistent with other recent estimates. Emission of volcanic gas remains at a very low level. A GPS station on the old dome that lost power over the weekend will be replaced later this week. No other significant new activity has occurred.