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Keyword: cascadia

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  • Scientists find telling early moment that indicates a coming megaquake

    05/29/2019 2:07:50 PM PDT · by BenLurkin · 29 replies
    phys.org ^ | May 29, 2019 | University of Oregon
    The physics-heavy analyses of two databases....detected a point in time where a newly initiated earthquake transitions into a slip pulse where mechanical properties point to magnitude. Melgar and Hayes also were able to identify similar trends in European and Chinese databases. Their study was detailed in the May 29 issue of the online journal Science Advances. Overall, the databases contain data from more than 3,000 earthquakes. Consistent indicators of displacement acceleration that surface between 10-20 seconds into events were seen for 12 major earthquakes occurring in 2003-2016. GPS monitors exist along many land-based faults, including at ground locations near the...
  • Earthquake study could make Pacific Northwest safer

    04/18/2019 1:04:46 PM PDT · by Ezekiel · 28 replies
    North Coast Citizen ^ | April 16, 2019 | By Steve Lundeberg, Oregon State University
    Findings by a team led by an Oregon State University geotechnical engineer are paving the way toward engineering techniques that could keep Pacific Northwest residents safer during the eventual Cascadia Subduction Zone earthquake. By Steve Lundeberg, Oregon State University Ben Mason of the OSU College of Engineering led a National Science Foundation-supported team that traveled to Indonesia to study the aftermath of the magnitude 7.5 Palu-Donggala quake that occurred in September 2018. >>> Roughly 85 miles off the Pacific shoreline, the Cascadia Subduction Zone is a 600-mile fault running from northern California to British Columbia. Over the last 10,000 years,...
  • USGS/Drudge: 5.6 Quake off Oregon-CA coast. At location of Future 9.0 Cascadia Subduction Quake.

    07/24/2018 7:57:45 PM PDT · by Robert A Cook PE · 110 replies
    Drudge Report, USGS, Oregon Live ^ | 24 July 2018 | RACookPE1978
    USGS reported 11 earthqaukes (the largest a magnitude 5.6) off the Oregon coastline today, right at the Oregon-CA border on the Juan de Fuca rise associated with the subduction zone of the Pacific plates and North American plates. This area, the Juan de Fuca fault subduction zone, has been quiet since 1700 - when a magnitude 9.0 quake occurred dropping land as much as 2 meters (9 feet) over the entire 800 mile Vancouver-Washington-Oregon coastline. That quake in 1700 caused documented 10 meter (30 foot) high tsunami's recorded in Japan that crushed many villages and towns. Many previous large earthquakes...
  • A look at the Northwest earthquake that shook the world

    01/27/2017 6:09:31 PM PST · by JimSEA · 15 replies
    Seattle PI ^ | 1/25/17 | ZOSHA MILLMAN
    Just before midnight on Jan. 27, 1700, Japan woke to a massive tsunami, a surprise since no one there felt the earthquake that would’ve caused it. Years later, scientists finally figured out why – it all started in Cascadia, exactly 317 years ago. Samurai, merchants and villagers wrote of minor flooding and damage. Confusion abounded. After all, there had been no tremor in Japan that would’ve given locals warning of a rogue wave.The “orphan tsunami” wouldn’t be linked to the parent earthquake, which originated in the geologically active Pacific Northwest’s Cascadia subduction zone, until the 1990s. The zone hosts a...
  • The most dangerous fault in America

    06/07/2016 8:52:55 AM PDT · by JimSEA · 34 replies
    Earth ^ | May, 2016 | Steven Newton
    Last summer, a startling article appeared in The New Yorker magazine outlining what could happen to the Pacific Northwest in the event of a large earthquake resulting from a full rupture of the Cascadia Subduction Zone. As recently as 1700, this convergent zone produced an earthquake estimated at magnitude 9. The article attracted a great deal of attention, especially among people who had never heard of the possibility that the heavily populated Pacific Northwest could, in a geologic moment, become “toast” — as someone quoted in the article put it. The San Francisco Bay Area also suffers from the unfortunate...
  • Emergency planners plan for deadly 'Big One' earthquake

    01/20/2016 11:15:43 AM PST · by Olog-hai · 23 replies
    Associated Press ^ | Jan. 20, 2016 2:02 PM EST | Terence Petty
    As military helicopters ferry search and rescue teams over the Pacific Northwest, below them are scenes of devastation from a giant earthquake that could strike the region at any time. Tsunami waters surge through coastal communities. Buildings, bridges and roads lie in ruins. Fires burn out of control. Survivors are stranded on rooftops, cling to floating debris or are trapped inside wrecked buildings. Seismologists say a full rupture of a 650-mile-long offshore fault running from Northern California to British Columbia and an ensuing tsunami could come in our lifetime, and emergency management officials are busy preparing for the worst. Federal,...
  • US West Coast Earthquake Warning as Cascadia Subduction Zone Surges [Matthew 24]

    01/19/2016 3:55:32 AM PST · by Jan_Sobieski · 50 replies
    Eugene Daily News ^ | 1/19/2016 | Staff
    An ocean data buoy is alerting to an "event" in the Cascadia Subduction Zone off the west coast of Oregon. This is where a magnitude 9 earthquake hit in 1700. According to the data buoy, the water column height (depth) fell sharply within minutes off the coast of Oregon, signaling the land beneath the ocean has suddenly "sunk." As of 0231:30, the initial water column height is 2738.80 Meters deep (8985.56 feet). Two minutes and thirty seconds later, that same water column height had dropped to 2738.66 Meters deep (8985.10 feet). Where did the four inches of water disappear to?...
  • Monster tsunami could devastate California: study (hypothetical 9.1 magnitude quake off Alaska)

    09/04/2013 5:53:38 PM PDT · by NormsRevenge · 67 replies
    Yahoo! News ^ | 9/4/13 | AFP
    A tsunami generated by a massive earthquake off Alaska could cause major damage to California's economy and force 750,000 people to evacuate, a report published Wednesday warned. One third of all boats in California's marinas could be damaged or sunk, costing some $700 million in losses, while major ports would struggle to get huge cargo vessels out to sea in time to avoid being buffeted by tsunamis. Experts from the US Geological Survey (USGS) based their damage assessment on the scenario of a 9.1 magnitude quake off Alaska's Pacific Coast, which it said was "hypothetical but plausible." "In this scenario...
  • Scientists: Volcano Could Swamp U.S. with Mega-Tsunami

    03/29/2005 3:41:11 PM PST · by ex-Texan · 154 replies · 4,896+ views
    China Daily ^ | 3/29/2005 | Staff Writers
    A wall of water up to 55 yards high crashing into the Atlantic seaboard of the United States, flattening everything in its path -- not a Hollywood movie but a dire prophecy by some British and U.S. academics. As the international community struggles to aid victims of last month's devastating tsunami in southern Asia, scientists warn an eruption of a volcano in Spain's Canary Islands could unleash a "mega-tsunami" larger than any in recorded history. Hammocks almost buried at the beach of Pajara district in Fuerteventura island (Canary Island), southern Spain. Countries all around the Atlantic rim could be hit...
  • Researchers Plot Course Of Ancient American Tsunami (902AD)

    10/28/2002 4:27:53 PM PST · by blam · 30 replies · 808+ views
    Ananova ^ | 10-28-2002
    Researchers plot course of ancient American tsunami Researchers have calculated the scale of a giant wave that devastated the north west coast of America 1,100 years ago. Japanese scientists used computer modelling to recreate the devastation from the ancient tsunami. The team from the Disaster Reduction and Human Renovation Institution in Kobe say the work will help planners minimise the impact of any future wave. The researchers took clues from silt deposits found in the Puget Sound, a Pacific inlet above earthquake fault lines in the Seattle area. Experts say the tsunami could have reached up to seven metres in...
  • In Past Tsunamis, Tantalizing Clues to Future Ones

    01/04/2005 6:27:04 PM PST · by neverdem · 3 replies · 1,979+ views
    NY Times ^ | January 4, 2005 | KENNETH CHANG
    The Cascadia fault, a 600-mile-long collision between two chunks of the earth's crust off the Pacific Northwest coast, has been quiet for a long time, and that is not a comforting fact. Major earthquakes occur somewhere in the world every year or two. Catastrophic tsunamis - giant waves generated by undersea earthquakes or landslides - strike less often, and some of the largest of tsunamis originate in places that do not, at first glance, appear particularly treacherous. The devastating tsunamis created Dec. 26 by a magnitude 9.0 earthquake that killed as many as 150,000 people on the shores of the...
  • Oregon ‘Will Be Toast’ When Next Big Earthquake Hits

    07/16/2015 11:03:50 PM PDT · by nickcarraway · 14 replies
    KOIN ^ | 7/16
    Northwest region is 72 years overdue for next big earthquake, experts sayOne of Oregon’s top earthquake experts predicts the “really big one” will wipe out the entire Northwest. In fact, the area’s FEMA director said everything west of I-5 “will be toast”. Andrew Phelps, director of the Oregon Office of Emergency Management, says there will be 6 minutes of shaking when the 'really big' quake hits. (KOIN) Andrew Phelps, director of the Oregon Office of Emergency Management, says there will be 6 minutes of shaking when the ‘really big’ quake hits. (KOIN) In The New Yorker article “The Really Big...
  • FEMA is planning for an earthquake that would devastate the Pacific Northwest, killing...

    07/15/2015 4:47:55 PM PDT · by BenLurkin · 130 replies
    <p>To the north of California's famous San Andreas fault is a less known, but possibly more deadly, fault line. The Cascadia subduction zone runs some 700 miles from northern California to Vancouver.</p> <p>In a deeply reported article for The New Yorker, Kathryn Schulz tells the tale of how this fault lies dormant for periods of 243 years, on average, before unleashing monstrous tremors. The Pacific Northwest is 72 years overdue for the next quake, which is expected to be between 8.0 and 9.2 in magnitude.</p>
  • Unlocking the Cascadia Subduction Zone's secrets: Peering into recent research and findings

    07/23/2014 1:51:59 PM PDT · by JimSEA · 6 replies
    Earth Magazine ^ | 7/20/2014 | Andrea Watts
    Once overlooked because of its relative inactivity compared to other subduction zones around the world, the Cascadia Subduction Zone (CSZ) — and the potentially devastating megathrust earthquakes and tsunamis it could unleash — are today well known to both geoscientists and the public. Beginning with the efforts of John Adams of the Geological Survey of Canada and Brian Atwater of the U.S. Geological Survey in the late 1980s, a series of oceanic research cruises and datasets has steadily advanced our understanding of Cascadia. It seems like there is “a paradigm change every few years,” says Chris Goldfinger, a geologist at...
  • A potent threat of major earthquake off California's northern coast

    03/13/2014 9:34:45 PM PDT · by John W · 32 replies
    latimes.com ^ | March 12, 2014 | Rong-Gong Lin II and Rosanna Xia
    If a 9.0 earthquake were to strike along California's sparsely populated North Coast, it would have a catastrophic ripple effect. A giant tsunami created by the quake would wash away coastal towns, destroy U.S. 101 and cause $70 billion in damage over a large swath of the Pacific coast. More than 100 bridges would be lost, power lines toppled and coastal towns isolated. Residents would have as few as 15 minutes notice to flee to higher ground, and as many as 10,000 would perish. For years, scientists believed the largest earthquake the area could produce was magnitude 7.5. But scientists...
  • Northwest at risk of megaquake like one in Chile

    03/04/2010 5:02:30 AM PST · by Kartographer · 46 replies · 1,291+ views
    AP/YahooNews ^ | 3/2/10 | ALICIA CHANG
    Just 50 miles off the Pacific Northwest coast is an earthquake hotspot that threatens to unleash on Seattle, Portland and Vancouver the kind of damage that has shattered Chile. The fault has been dormant for more than 300 years, but when it awakens — tomorrow or decades from now — the consequences could be devastating.
  • Danger lurks below in Oregon (Cascadia Subduction Zone)

    09/16/2005 4:07:47 AM PDT · by happinesswithoutpeace · 24 replies · 968+ views
    Statesman Journal ^ | September 15, 2005 | BETH CASPER
    Danger lurks below in Oregon The state faces the likelihood of a major earthquake that would kill thousands and cause billions of dollars in damage -- and we're not ready for it. A hurricane as destructive as Katrina striking Oregon is about as likely as a rain-free winter in the Northwest. Oregon hasn't been hit by a hurricane even close to that powerful in recorded history. But that doesn't mean the state is immune to disaster. Scientists warn that the 800-mile-long earthquake fault off the state's coast will shake the ground as far east as the Cascades -- hard enough...
  • If Big Quake Hits off Coast, Tsunami Could be Gigantic (Washington, Oregon, California)

    06/14/2005 12:38:57 PM PDT · by Strategerist · 127 replies · 3,241+ views
    The San Francisco Chronicle ^ | June 13, 2005 | David Perlman
    If a giant magnitude 9 earthquake strikes someday along the coast of the Pacific Northwest, or if, against all odds, an errant asteroid plunges into the ocean many miles off California, a monstrous tsunami could drown low- lying lands all up and down the continent's western edge -- and now a UC Santa Cruz scientist has calculated the sweep of such an event..... ...To model the event's effects, Ward assumes that in a huge quake on the Cascadia subduction zone, the two crustal plates would abruptly slip apart vertically by at least 50 feet in three successive blocks from south...
  • Scientists: Tsunami Could Hit West Coast

    01/03/2005 12:34:11 PM PST · by Pyro7480 · 117 replies · 3,439+ views
    Yahoo! News (AP) ^ | 1/3/2005 | Joseph B. Verrengia
    Scientists: Tsunami Could Hit West Coast Tsunami scientists and public safety officials are closely watching an earthquake-prone nation with thousands of miles of crowded coastlines for signs of an imminent disaster. Indonesia? Japan? Try the United States. Experts say the West Coast could experience a calamity similar to the one they have been watching unfold half a world away. "People need to know it could happen," said geologist Brian Atwater of the U.S. Geological Survey. Scientists say grinding geologic circumstances similar to those in Sumatra also exist just off the Pacific Northwest coast. They are a loaded gun that could...
  • Let’s Consider United State of Washington [Secession]

    09/25/2004 11:49:44 AM PDT · by Publius · 186 replies · 2,931+ views
    Seattle Post-Intelligencer ^ | 25 September 2004 | Brad Upton
    Our intrepid leader, W, prides himself on being a man of strong faith. It is no secret that he turns to God for guidance. If three hurricanes in a row slamming into Florida right before the 2004 election isn't a clear sign from the Almighty that he wasn't pleased with how things went in that state in 2000, I don't know what is. Even George should be able to interpret that sign! This upcoming election is starting to scare the great citizens of the state of Washington. A recent CNN poll on swing states showed that Washington was the only...