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Mount St. Helens, Living Laboratory for 40 Years THURSDAY, APRIL 30, 2020 Tim Clarey, Ph.D., and Frank Sherwin, M.A. Nothing put a damper on uniformitarianism like the Mount St. Helens eruption on May 18, 1980. That explosion still echoes through the halls of the scientific establishment 40 years later. For nearly 150 years prior to the eruption, strict uniformitarianism reigned supreme in geology.

Remembering Mount St. Helens 35 Years Later by Brian Thomas, M.S. * The volcano’s main 1980 eruption filled in an entire valley with hundreds of feet of sediment. Another smaller eruption event deposited more material on top of that, and then a third deposition occurred in 1982. Later, a catastrophic flood of snowmelt water and muddy debris tore a gash through those fresh deposits, revealing sharp and flat contacts between each earlier deposit. It also showed that fast-flowing currents can lay down multiple layers thinner than a finger width. Mount St. Helens revealed to the world that both thick and...

Mount St. Helens Victims' Kin Sound Off By RUKMINI CALLIMACHI, Associated Press Writer 1 hour, 13 minutes ago MOUNT ST. HELENS NATIONAL MONUMENT, Wash. - The four, their lungs filled with ash, were found inside their car after Mount St. Helens erupted on May 18, 1980, with the force of a hydrogen bomb. Rescuers also discovered a cassette recorded by Ron and Barbara Seibold's children, ages 7 and 9, as the family drove toward the volcano. "They were goofing around — asking whether or not they would see lava coming out of the mountain," said Jim Thomas, an emergency worker...

VANCOUVER, Wash. - Mount St. Helens has been rumbling with a series of small earthquakes. The University of Washington seismographs show there was a 3.0 magnitude quake at 9:41 Sunday night, a 3.4 at 10:43 and a 3.2 Monday morning at 3:56. In the past, such quakes have indicated a steam burst or minor ash plume. A spokesman for the University of Washington seismology lab, Bill Steele, said the quakes "do seem to be getting a little bit larger and that's of interest, but what it all means we don't know." Scientists lost most of their instruments in a minor...

Mount St. Helens bursting with ash Last Updated Tue, 08 Mar 2005 21:51:46 EST CBC News SPOKANE, WASHINGTON - Mount St. Helens in Washington state has erupted, sending a plume of steam and ash 7,600 metres into the air. Government scientists say they measured an earthquake of magnitude 2.0 beneath the mountain when the first plume of smoke went up Tuesday. The volcano has been active in previous months. A minor eruption lasted 24 minutes last October, sending up 3,000 metres of steam and ash. The U.S. Geological Survey detected magma moving below the surface, along with the increased presence...

MOUNT SAINT HELENS, Wash. - The new lava dome inside the crater of Mount Saint Helens 50 miles north of Portland has grown a protrusion the size of a 30-story building that glows red at night. Scientists from the U.S. Geological Survey released dramatic new video of that growth. Night video shows the hot lava dome glowing red. Scientists say it is the result of rising magma, or molten lava. The lobe began building up last month and has grown to the size of an aircraft carrier. One section has risen 330 feet in the past ten days. Scientists still...

The earthquakes did discontinue for several hours after the eruption. An odd harmonic indicator showed up on seismographs for a few hours that could have indicated magma movement. The earthquakes have drastically kicked up and have resumed their original pattern prior to the eruption. Prior, Eruption, and Post Well after post-eruption