Mt. Fitzherbert
USGS Update 2004-Dec-26 09:00
Potential ash hazards: Wind forecasts from the National Oceanic and Atmospheric Administration (NOAA), coupled with eruption models, show that ash clouds that rise above the crater rim today would drift northeastward.
Recent observations: Clouds and icicles obscure views from the VolcanoCam this morning. Those who check Mount St. Helens' seismicity on the PNSN Webicorders will note that late yesterday afternoon's M8.9 earthquake in Sumatra, although well recorded on many PNSN stations, doesn't show up prominently on the stations close to Mount St. Helens. That is because seismologists set the sensitivity of St. Helens' stations low so that they will stay on scale and record the ongoing small earthquakes that are close to many of the stations.