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 to the east-southeast.

Recent observations: The first day of summer begins much as the last day of spring ended, with many small earthquakes occurring along with occasional rockfalls. Visual surveys made yesterday provide independent confirmation that dome extrusion continues unabated. Field crews had a successful day in the crater yesterday. A number of instruments (“spiders”) damaged by snow and/or rockfalls were retrieved, two seismic “spiders” were repaired and redeployed at their original locations, and new GPS “spiders” were installed on the western arm of the main glacier and on an older part of the growing lava dome. Field crews also serviced several additional seismic sites and repaired the Sugarbowl camera. Finally, hydrologic surveys were performed on two streams that have outlets in the crater. Field plans for today include servicing several more cameras located on the crater rim, deploying several temporary GPS stations, and performing additional hydrologic surveys.