Re: Techtonics of Sumatra Earthquake

From: George (george_at_wtfiswrongwithyou.com)
Date: 12/30/04 

Date: Thu, 30 Dec 2004 05:05:48 GMT

"Dora Smith" <villandra@austin.rr.com> wrote in message
news:eDJAd.19828$3v5.7450@fe2.texas.rr.com...
>I have my own questions, but first to answer these - no, the reports are
> saying Sumatra moved upward a hundred feet, and it is expected to have moved
> upward by maybe a few feet - and maybe some parts of it.
>
> What moved upward is a part of the fault zone where the quake occurred.
> They are real unclear on if the upward motion was a hundred feet or several
> meters, and I don't know how they know the direction was up.
>
> As for predicting that two plates are going to collide - of course. They
> know that the Australia/ India plate (s) are subducting under the Eurasian
> plate - of which the "Sunda" and "Burma" plates are some kind of subplates
> with no defined significance that I've been able to find.
>
> The difficulty is in knowing when pieces of the plate will hang up or break
> lose.
>
> --
> Yours,
> Dora Smith
> Austin, Texas

I'll make it simple for you. Place both of your hands on a table top, palms
down with the finger tips of each hand facing each other. Say that your left
hand is plate A, while your right hand is plate B. Now move your left hand
toward the right hand such that the left hand (plate A)slides beneath the right
hand (plate B). When you do this you will see that the left hand has moved
relative to the right hand (horizontal movement), and slid beneath the right
hand, causing the right hand to move vertically. This is essentially what
happened. Are we clear?

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