Volcanic eruption like Mount St. Helens: ‘It will happen again in Cascades’

Mt St Helens
May 2015EUGENE, Ore.Mount St. Helens caught science a little by surprise. A volcano hadn’t erupted on the United State mainland outside Alaska and Hawaii since California’s Lassen Peak in early 20th Century. And modern science had yet to witness an eruption quite like St. Helens. “I think this was a turning point in the way people approached these kinds of potentially active, explosive volcanoes,” said Mike Dungan, a volcanologist with an office at the University of Oregon. St. Helens didn’t just erupt: it blew up. The force of the May 18, 1980, eruption wasn’t just vertical; it was lateral, sending a side of the mountain rocketing down slope as a wall of boiling mud and rock. The eruption killed 57 people – and put scientists and policy makers on notice.
“It’s only a matter of a short time – decades or something – before another one of these things occurs,” Dungan said. “A sector collapse eruption like Mount St. Helens – it will happen again in Cascades.” Research at the University of Oregon is shedding new light on the cause of the explosion. Geologists like PhD student Kristina Walowski are conducting research into how ocean water seeps into offshore plates as they plunge deep into the earth. “What’s really interesting is that water is really important because it lowers the melting temperature of a rock and when that happens you can create magma,” she said. “The water is really the key thing that causes the expansion, just like when champagne comes jetting out of a bottle,” said Paul Wallace, professor geological science at UO. “It’s a foamy material because of the gas present in gas bubbles.”
The May edition of Nature Geoscience published the findings by the Oregon team, funded by a National Science Foundation Grant. “Ultimately the water that makes them so explosive is coming out of the ocean,” Wallace said. “And eventually as the plate moves like a conveyor belt, it gets returned back down into the inside of the earth. It’s not like you’re pouring cups of water into the interior of the earth, right?” Walowski said. “There’s a complicated set of reactions and breakdowns where these rocks are changing shape, and releasing water little by little by little.” So which of the Cascade volcanoes is next in line to erupt? It’s difficult to predict, but geologists are watching. “We’re really in the midst of a technology explosion when it comes to monitoring volcanoes, using all kinds of things using remote sensing instruments on satellites,” Wallace said. “Mount St. Helens is still the most frequent in the Cascades,” Walowski said, “and based on that, it may be the most likely to go again.” –KVAL
    March 1980: Mount St. Helens awakens from dormancy after 123 years with no warning signs
This entry was posted in Dormant fault activation, Earth Changes, Earth Watch, Earthquake Omens?, High-risk potential hazard zone, Landslide & geological deformation, Magma Plume activity, Potential Earthchange hotspot, Prophecies referenced, Seismic tremors, Signs of Magnetic Field weakening, Time - Event Acceleration, Volcano unrest, Volcano Watch. Bookmark the permalink.

8 Responses to Volcanic eruption like Mount St. Helens: ‘It will happen again in Cascades’

  1. Dennis E. says:

    Reported earthquake under glacier peak in Washington State 3.0.
    Reported Mount Hood had a 3.0 recently.

    Liked by 1 person

  2. Chris says:

    I am waiting for Hood or Adams to go. It will happen.


  3. Clint Hunter says:

    ~ got brown gas build up in your water spiltting subduction zones and / or GABON WEST AFRICA styled driven Uranium refinement & enrichment process under your next grand magmic expulsion event ?
    = use the neutron monitor count ( assume you don’t handle neutrino detection very efficiently ) ” luke ” !


  4. Shepherd says:

    This is good. I remember when Helen’s blew. I visited with someone the ohter day who lives in WA. She heard “an explosion” and thot they were dynamitying. Her hubby said its Helen. This video is a good memoir of this event.
    Because it erupted early in the morning instead of evening or night – that was the Mercy of GOD. You can see that in the video.
    When the Cascades blow again – that too will be the Mericy of GOD – when China attacks and sends missiles into USA – the volcanoes will attack the missiles. – vision of Henry Gruver.


  5. Katnea says:

    Oh wow, Thank – You so much for sharing the minute by minute video of Mount St. Helen erupting! Yup, I absolutely sat glued to my chair watching this whole video from start to finish.


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