FILE - In this May 18, 1980, file photo, Mount St. Helens sends a plume of ash, smoke and debris skyward as it erupts. May 18, 2020, is the 40th anniversary of the eruption that killed more than 50 people and blasted more than 1,300 feet off the mountain's peak. (AP Photo/Jack Smith, File)COUGAR, Wash. The coronavirus outbreak disrupted what had been big plans to mark the 40th anniversary of the eruption of Mount St. Helens in Washington state. And Mount St. Helens may not be done yet. The first of a series of small explosions on Oct. 1 shot volcanic ash and gases into the air.