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Thread: Newly Found Fault In Arkansas

  1. #9
    herenorthere's Avatar
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    The traditional explanation is that the Mississippi flows through a failed rift that extends north from the "successful" Gulf of Mexico rift. The New Madrid earthquake happened at the northern tip of the failed rift. It's the major, but not the only rift/fault system in the area. The area isn't especially active, geologically speaking, but liquefaction makes any earthquake there especially devastating. That's why San Francisco's Marina District (developed on fill) was heavily damaged by the World Series earthquake back in the late 80s. It was actually a fairly minor earthquake by CA standards, but development in areas susceptible to liquefaction made it pretty destructive. Other than for stopping the World Series, the earthquake was most famous for a doubled-decker highway bridge that failed, crushing people under the fallen upper deck. The bridge supports were in marshland. The moral of the story is to ride out earthquakes on solid rock, not wet sediments.
    Bruce in CT

    Madness is something rare in individuals but in groups, parties, peoples, ages it is the rule. Friedrich Nietzsche

  2. #10
    rattler's Avatar
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    yeah it doesnt let loose often, dont think there has been anything but the slightest tremors in the last 100 years(think the average is one a year is even strong enough felt by the average person), nothing major since the early 1800's but its record seems to be long periods of no action and all the sudden it will let loose with a magnitude 6-7-8 type quake and than be quite for a long while again.....and given the area is basically one large flood plain very few places are sitting on bedrock.....its just a ticking time bomb waiting to go off i think the figured average right now is between 300 and 500 years between major damaging quakes so it is unlikely we will see one in our life time.....course, it could let loose tomorrow aswell, as Mother Nature tends to pay no attention to statistics and does what she pleases....
    cervid serial killer
    Know guns, know peace, know safety. No guns, no peace, no safety
    I didn't get stimulated but he kept his promise on change, that's about all I got left!
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  3. #11
    feedme's Avatar
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    I lived in Indiana growing up. About 15-20 years ago we had a 5.0 in the early evening. I have been through some 5.0 earthquakes here in SoCal, but they have not felt as fierce as the one in Indiana. It really does make a difference as to the type of rock you are on when it happens.

    I remember reading somewhere that the New Madrid Fault has the potential to be more devastating than the San Andreas of California. Not sure where I saw that though.
    Feed me Seymour.

  4. #12
    rattler's Avatar
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    yep more devistating because of the type of ground everything is built on.....when it starts majorly shaking for all intents and purposes as far as the buildings are concerned the ground their built on is going to turn to mud and they are going o sink, fall over, collapse....atleast in alot of California you are basically on bedrock which is firm ground so you just got to build buildings that can take some shaking......kinda hard to build something thats going to be able to take the hard packed dirt they were built on turning to quicksand...........
    cervid serial killer
    Know guns, know peace, know safety. No guns, no peace, no safety
    I didn't get stimulated but he kept his promise on change, that's about all I got left!
    http://www.wolfpointherald.com/--http://www.safety-brite.net/

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