SKAMANIA COUNTY - Mt. St. Helens sprung back to life Tuesday afternoon as perhaps the largest eruption since the volcano became active again occurred at 5:25 p.m.
Video from our sister station KATU-TV in Portland showed a large steam and ash plume rising as high as 15,000 to 25,000 feet from the volcano's crater.
UW Seismologist Bill Steele said that ironically, recent tests within the last few days showed very low volcanic gas levels. They did record a slight increase in average magnitude of quakes in and around the lava dome before the evening eruption.