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Mount St. Helens, giving a preview of events to come. When, exactly, would the main event occur? Therein lies the lesson. (USGS Photo)
On the last day of his life, May 18, 1980, David Johnston was probably tired of waiting for Mount St. Helens to erupt, much as some of us are sick of waiting for the global bubble economy to blow up. And he was no doubt tired, as are we, of warning people that it was going to blow. Back in March, swarms of earthquakes rising from deep in the earth indicated magma rising and caused volcanologists such as Johnston to proclaim, “It’s going to blow!” It didn’t. Then the mountain burped a 7,000-foot-high plume of ash. “It’s going to blow,” they said. It didn’t. By mid-April the mountain was burping ash and steam a hundred times a day, and bulging massively toward the north. Still it didn’t blow. In fact, in early May, it quieted down. It had become a tourist Mecca.
Then, on May 18, it blew. Not straight up but laterally, to the north, where Johnston was watching from the ridge of a different mountain six miles away. He had time only to grab his radio and shout to his headquarters (in Vancouver, Washington), “Vancouver! Vancouver! This is it!.” Then, in less than a minute, the first pyroclastic flow — hot gases and rock, over 1,000 degrees Fahrenheit, moving at 700 miles per hour — hit him, and he was gone. Continue reading →