Mt. Fitzherbert

Potential ash hazards: Wind forecasts from the National Oceanic and Atmospheric Administration (NOAA), coupled with eruption models, show that ash clouds rising above the crater today would be transported toward the east or northeast.

Recent observations: A medium-sized rockfall event yesterday evening at ~6:00PM PDT was recorded on our seismic stations. This is the most recent of several rockfalls since Memorial Day that have been breaking apart the spine that grew between March and May of this year. The lobe on which the decrepitating spine stands continues to rise, accompanied by small “drumbeat” earthquakes that recur at the rate of one every few minutes.