Re: Fun Earthquake Quiz

David Oberman <doberman@etc.> writes:

Here's a fun earthquake quiz from Florida International University:

http://www.fiu.edu/~srimal/erthqkqz.htm

Click the correct radial button, & your score will be generated at the
end of the quiz.

I missed two: No. 7 (a simple fact I just didn't know)

This follows from simple triangulation principles when all you really
know is the distance to an event. With 1 station, all you can tell is
that the event is a given distance away. This gives you a circle. With
2 stations, you get the intersection of two circles, which will most of
the time give you 2 potential locations (very rarely, just one if the
circles are tangent to each other). With 3 stations, you can narrow it
down to a single location.


& No. 8, the
answer to which confuses me because I assumed that, the further you
get from the quake origin, the greater the distance between P & S
waves grows (because P waves travel faster).

I agree with you on number 8. I thought there were two correct answers
in the list. But I lucked out and picked the correct one.

--
Thomas A. Russ, USC/Information Sciences Institute
.

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