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Strong Northern California Earthquake 1/9/2010 at 4:27:39 PM (PST)

Discussion in 'The OT' started by phrelin, Jan 9, 2010.

  1. phrelin

    phrelin Hall Of Fame DBSTalk Club

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    Northern...
    USGS lowered the magnitude of this latest quake to 5.9 and they are still studying to determine if this was an aftershock or a quake on a different fault triggered by the earlier one. From the Eureka Times Standard (FYI Petrolia is the little town closest to the epicenter):
    The discussion here about what makes a quake cause damage is accurate - many variables are involved.

    Engineering structures for earthquakes is still an evolving process. A few years back in one of the Southern California earthquakes a million gallon water tank, fully engineered to withstand major earthquakes, collapsed because of an unanticipated action - the quake threw the full tank straight up off the ground about a foot and the force of that landing was too much for the bottom to withstand. No one had designed for an earthquake that could do that. The tank could have easily withstood a "typical" 7.9 rolling quake, but a relatively close lesser quake with significant vertical sheer forces hadn't been anticipated.

    All the retrofit efforts notwithstanding, when THE BIG ONE occurs most structures will have some damage and significant numbers of injuries and deaths will occur. Access and prioritizing rescue and relief efforts will present challenges. No matter what, government will get criticized for being unable to have crews everywhere at once.
     
  2. SayWhat?

    SayWhat? Know Nothing

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    I'm not really sold on the engineering concepts in use to prevent or minimize damage. They've only been tested in simulators on models. To my knowledge, no real world building using any of the current methods has been subjected to a 'quake of 8 or more. I believe a 9.x like Alaska would be a real wake up call if it hit in a place like L.A., S.F., Tokyo, or any other major city. My guess is that most if not all buildings would be rendered unusable.
     
  3. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    At some point it becomes time to just bend over and kiss your... goodbye.
    "The point" is to reduce the time you must, as much as possible.
    NORAD was built to survive a "major occurrence", but I wouldn't want to live there full time.
     
  4. phrelin

    phrelin Hall Of Fame DBSTalk Club

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    Well, I have lived a good long time and not reached the kissing point yet. But our house would have damage with a nearby 7.2+. And above 8.0 on the San Andreas anywhere North of the San Francisco Bay, well let's just say if I were still alive I'd be digging through the rubble for my emergency supplies.:eek2:
     

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