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Pacific Northwest "Chile-level" quake risk

Discussion in 'The OT' started by phrelin, Mar 2, 2010.

  1. Mar 2, 2010 #1 of 22
    phrelin

    phrelin Hall Of Fame DBSTalk Club

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    I don't believe in creating great fear about natural disasters like earthquakes. They happen and you can't prevent them. But you can be prepared, assuming you are aware of the hazards. What concerns me is that it appears that many on the West Coast are not clear that the greatest earthquake hazard is not a Haiti-like quake in the middle of LA or the Bay Area, but a Chile-like quake creating damage from Northern California to British Columbia.

    Unfortunately, many are not aware of this, but from the AP via Yahoo:
    The Cascadia Region Earthquake Workgroup (CREW) has a website and in 2005 prepared a report Cascadia Subduction Zone Earthquakes: A magnitude 9.0 earthquake scenario (PDF) that anyone who lives within 300 miles of the area from the Brooks Peninsula on Vancouver Island to Cape Mendocino should be aware of.

    On CREW's site they have links to various sites including a piece on the NY Times website Chilean Quake a Warning to U.S. Northwest that discusses risks in public buildings like schools in Oregon and a piece in USA Today Chilean earthquake hints at dangers of 'Big One' for USA which includes:
    As someone who lives where, off the coast, the Cascadia subduction zone meets the San Andreas Fault and as someone who has been responsible for emergency planning, I am acutely aware of the scenario described in the CREW 2007 tabletop exercise as follows:
    The quake in Haiti was heart-wrenching because of the fact of poverty and inadequate government. But Americans need to pay more attention to the situation in Chile as a learning opportunity.
     
  2. phrelin

    phrelin Hall Of Fame DBSTalk Club

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    Thought I'd just bring this thread up quoting an article from today:
    The graphic below is from the Wikipedia article on the 1700 Cascadia earthquake:


    [​IMG]

    (My home is located within pink shaded area.) From the heavily footnoted article:
    Finally, from an article by By Greg Lange on HistoryLink.org, the free online encyclopedia of Washington State history which uses the creative commons license for its contents:
     
  3. scooper

    scooper Hall Of Fame

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    Also in that general geographic area - Yellowstone National Park is essentially one "supervolcano" that is also overdue for a big eruption. The last event from this super volcano affected at least half the Continental US - and probably did a nature made "nuclear winter" for a couple years.
     
  4. spartanstew

    spartanstew Dry as a bone DBSTalk Club

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    During the years I lived in Oregon and Washington, I never met anyone that wasn't clear on that.
     
  5. scooper

    scooper Hall Of Fame

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    Not to mention NY City is overdue for both an earthquake AND a Cat 2+ hurricane - the hurricane would have a storm surge out of proportion to storm strength because of the harbor layout - it would just funnel the water up.
     
  6. Herdfan

    Herdfan Well-Known Member

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    There was a geologist on O'Reilly last night explaining the same thing. He was from Oregon and explained that a quake of that magnitude is expected every 250 - 400 years. So that area is currently well within that time frame.
     
  7. RasputinAXP

    RasputinAXP Kwisatz Haderach of Cordcuttery

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    On what faultline? We're in the middle of the plate.
     
  8. phrelin

    phrelin Hall Of Fame DBSTalk Club

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    About NYC and earthquakes, we have this article from 2008:
    You would have to be very unfortunate to live in a period when a greater than 6.0 earthquake would happen given the lack of earthquake frequency. But that would be several million very unfortunate people.
     
  9. phrelin

    phrelin Hall Of Fame DBSTalk Club

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    Of course, most of us here know about the New Madrid Seismic Zone:

    [​IMG]

    But for those who don't, you may want to read about the 1811-1812 New Madrid Earthquakes that caused significant effects, reportedly even some sections of the Mississippi River appeared to run backward for a short time. In more recent times:
     
  10. Davenlr

    Davenlr Geek til I die

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    Yep, I am very aware of the New Madrid fault. Have not felt any earthquakes from it yet, but the possibility is always in the back of my mind.
     
  11. dpeters11

    dpeters11 Hall Of Fame

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    Over the past few years, I can think of at least two times where people in Cincinnati have felt a quake. The "bigger" of the two I think was from the New Madrid fault area, another last year from Ottawa.

    There are a couple of things that could cause huge issues that a lot of people in the US don't know about. A large quake on the New Madrid fault, and a Yellowstone eruption are two of them.
     
  12. SayWhat?

    SayWhat? Know Nothing

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    I doubt that Cinci would feel the New Madrid, but there are a number of other zones they might feel. Just recently one rocked Ontario and Michigan.
     
  13. harsh

    harsh Beware the Attack Basset

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    Did you know that Florida is sinking? Let's not leave out the Eastern Seaboard.
     
  14. machavez00

    machavez00 Hall Of Fame

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    These are all dwarfed by the 9.2 mega-quake that hit Alaska in 1964. This bad boy had everything, ground liquefaction, rise and subsidence , and it generated a tsunami.
    [​IMG][​IMG][​IMG]
     
  15. Rich

    Rich DBSTalk Club DBSTalk Club

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    There's a fault in the middle of Manhattan Island. And there is a bridge there especially built to withstand earthquakes. It's pretty old and in need of massive repairs, but it's there. Can't imagine what a large quake would do there.

    Rich
     
  16. Rich

    Rich DBSTalk Club DBSTalk Club

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    There's also that island around southern Spain or northern Africa that is in danger of sliding into the Atlantic. That's what scares most seismologists about the east coast, from what I've read.

    Scares hell out of me, I live next to an estuary of the Raritan River and Raritan bay, which opens onto NY harbor. I gotta get out of here.....:lol:

    Rich
     
  17. phrelin

    phrelin Hall Of Fame DBSTalk Club

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    My favorite quote from one of the areas damaged in the tsunami:
     
  18. VDP07

    VDP07 Godfather

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    This is the subject of "Countdown to Catastrophe: Mega Quake" on NatGeo right now. It will be rebroadcast next Sunday @7:00 am
     
  19. barryb

    barryb New Member

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    Something is moving.

    A section of highway 1 near Big Sur fell into the ocean yesterday.

    http://www.santacruzsentinel.com/ci_17630392?source=most_viewed
     
  20. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    I think this pretty much explains this:
    Highway 1 has been doing this from when it was first being built, almost 100 years ago.
     

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