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 northeastward.

Potential ash hazards to aviation: Under current eruptive conditions, small, short-lived explosions may produce ash clouds that exceed 30,000 feet in altitude. Ash from such events can travel 100 miles or more downwind.

Recent observations: A couple of inches of rain fell in the crater overnight and rainfall continues this morning. Rapid melting of recently deposited snow and subsequent erosion of ash and debris could generate small mudflows from the crater over the next few days. Two recent magnitude 3+ earthquakes (4:20 yesterday afternoon and 6:15 this morning) are the largest detected since December 2004. Such activity is within the normal range of seismicity recorded during this eruption.

Also added to the USGS website is a Eruption Chronology for the current activity, consisting of a full archive of these daily summaries, along with weekly summaries.