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  1. #31
    Senior Member jimrckhnd's Avatar
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    Quote Originally Posted by Wind-up Rex View Post
    I wasn't even aware the East Coast could have earthquakes

    Any smart person out there know the geological explanation behind this?
    I can tackle the explanation - smart or not is up to you.

    Most quakes take place along "active margins" where plate subduction is taking place - Japan or the northern west coast. The southern to mid west coast is odd in that it has a transverse fault (plates moving past each other instead of one plate getting subducted under another).

    However, on passive margins (no subduction) like the US east coast there are old faults dating back from when it was an active margin. These faults are mostly inactive but... sometimes the activate often to due to deroofing/sediment unloading (as the rock above them erodes the compressive forces reduce), sometimes due to isostatic rebound (from the retreat of ice sheets for example) or even drilling or occasionally mining activity. In this case I'm guessing (will have to look at the data as it comes out in the weeks and months ahead) that and old fault reactivated pretty close to the margin of the piedmont and coastal plain. My money is on erosonial forces finally allowing a fault to reactivate. It may be a reverse fault - in which case the accumulation of sediment on the coastal plain may have had a role.
    Never underestimate the power of stupid people in large groups

  2. #32
    It's always something... PuddleRiver's Avatar
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    Felt it in central WV. This is a first.
    "In the depth of winter, I finally learned that within me there lay one invincible summer."
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  3. #33
    Klingon Warrior Princess Patches's Avatar
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    DEVASTATION IN WASHINGTON DC:
    “Everybody has a secret world inside of them. All of the people of the world, I mean everybody. No matter how dull and boring they are on the outside, inside
    them they've all got unimaginable, magnificent, wonderful, stupid, amazing worlds. Not just one world. Hundreds of them. Thousands maybe.” -Neil Gaiman

    ~

  4. #34
    Away with the fairies Southern Kross's Avatar
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    Quote Originally Posted by Patches View Post



    DEVASTATION IN WASHINGTON DC:
    LMAO

    I was thinking the along the same lines. My country is still trying to recover from a couple of serious quakes, so forgive me if I'm not super impressed.

    However, I do realise they're pretty rare in Eastern North America and it's probably pretty exciting and dramatic for those who live there.
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    I've dreamt in my life dreams that have stayed with me ever after, and changed my ideas;
    they've gone through and through me, like wine through water, and altered the colour of my mind.

    - Emily Bronte

  5. #35
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    Next up!

    Hurricane!

  6. #36
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    Quote Originally Posted by Southern Kross View Post
    My country is still trying to recover from a couple of serious quakes, so forgive me if I'm not super impressed.

    However, I do realise they're pretty rare in Eastern North America and it's probably pretty exciting and dramatic for those who live there.
    Hey now, our 5.8 isn't too far from your 6.3!

  7. #37
    @.~*virinaĉo*~.@ Totenkindly's Avatar
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    Quote Originally Posted by MacGuffin View Post
    Hey now, our 5.8 isn't too far from your 6.3!
    Well, it's logarithmic, right? I mean, not too far, but further than it might seem.

    From wiki:
    The expression Richter magnitude scale refers to a number of ways to assign a single number to quantify the energy contained in an earthquake.

    In all cases, the magnitude is a base-10 logarithmic scale obtained by calculating the logarithm of the amplitude of waves measured by a seismograph. An earthquake that measures 5.0 on the Richter scale has a shaking amplitude 10 times larger than one that measures 4.0.
    So it's still five times larger amplitude than ours.
    "Hey Capa -- We're only stardust." ~ "Sunshine"

    “Pleasure to me is wonder—the unexplored, the unexpected, the thing that is hidden and the changeless thing that lurks behind superficial mutability. To trace the remote in the immediate; the eternal in the ephemeral; the past in the present; the infinite in the finite; these are to me the springs of delight and beauty.” ~ H.P. Lovecraft

  8. #38
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    Quote Originally Posted by Jennifer View Post
    Well, it's logarithmic, right? I mean, not too far, but further than it might seem.

    From wiki:


    So it's still five times larger amplitude than ours.
    Don't go using facts!

  9. #39
    @.~*virinaĉo*~.@ Totenkindly's Avatar
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    Quote Originally Posted by MacGuffin View Post
    Don't go using facts!
    Sorry.

    "OMG THE GODS ARE ANGRY AT US AND WILL SMITE US DEAD NEXT TIME OUR NATION REFUSES TO LISTEN REGARDLESS OF ANY SILLY OL' SCALE!"
    "Hey Capa -- We're only stardust." ~ "Sunshine"

    “Pleasure to me is wonder—the unexplored, the unexpected, the thing that is hidden and the changeless thing that lurks behind superficial mutability. To trace the remote in the immediate; the eternal in the ephemeral; the past in the present; the infinite in the finite; these are to me the springs of delight and beauty.” ~ H.P. Lovecraft

  10. #40
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    Better.

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