Mt. Fitzherbert

Potential ash hazards: Wind forecasts from the National Oceanic and Atmospheric Administration (NOAA), coupled with eruption models, show that any ash clouds rising above the crater rim today would drift north-northwest.

Recent observations: The eruption of a dacite dome continues, an assessment made largely on the basis of daily camera images spanning June 19 to July 10 and showing southward and westward displacement as the dome is fed internally by new hot lava. Short-term motion is slight, which makes daily assessments of eruptive activity at this sluggish dome increasingly difficult. But meters of steady persistent displacement can be tracked across 20 days time. Eruption-related seismicity is notably low, perhaps a half-dozen earthquakes in 24 hours. Most seismicity seen on crater stations is the periodic snapping of an unhappy glacier.