Mt. Fitzherbert

Views taken on 2005-May-24/26

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 northwestward to northward. However, later in the day, higher-altitude clouds would drift north-northeastward. Under these conditions, Johnston Ridge, Coldwater, and the eastern parts of State Route 504 could all receive fallout from any ash clouds produced by explosions or large rockfalls.

Recent observations: Analysis of a digital elevation model produced from aerial photographs taken on 19 April shows that the new lava dome had reached a volume of 47.5 million cubic meters (about 62 million cubic meters). We have changed the method by which we compute the volume of the dome, so this figure isn't directly comparable to results we've given in the past (by the older method the new volume is about 55 million cubic meters). The rate of addition of lava to the dome remains roughly constant at about 1.5 cubic meters (2 cubic yards) per second.