Mt. Fitzherbert

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-northwestward in the morning and north-northeastward later in the day.

Recent observations: The growing lava spine continues to generate rockfalls. On Saturday night, just before 11 pm PDT, one of the larger earthquakes that typically occur once or twice per day was accompanied by a substantial amount of rockfall. An image taken by a remote camera on the crater rim about 20 minutes after the event shows that glowing hot rock debris had been delivered to the talus aprons that flank the steep north and south margins of the spine. A glow was also detected on satellite imagery monitored by other federal agencies. Rockfall events such as the one on Saturday night are commonly accompanied by ash clouds.