shakin

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From: Eric Muller (emuller@exploratorium.edu)
Date: Mon Nov 18 2002 - 16:11:28 PST 

Date: Mon, 18 Nov 2002 16:11:28 -0800
From: Eric Muller <emuller@exploratorium.edu>
Subject: shakin
Message-id: <000901c28f60$34e5c120$6401a8c0@office>

Hi pinholers,

A few people asked me about the "quickie" p and s wave demonstration/filler
I did on Saturday. I had people standing shoulder to shoulder as I pushed
on them simulating p and s-waves.
The "cool" John Lahr showed it to me one summer.
You can find this activity at:
http://www.jjlahr.com/science/earth_science/human_waves/index.html

I was also asked about p and s-wave velocities.
I found a simplified chart of p-wave velocity with depth at:
http://www.caosclub.org/members/earth16.html#chart.
They go about 5 to 7 km/s at the surface to almost 13.5 at depth.

As I vaguely recall, s-waves travel generally about ½ the speed.

Eric Muller
Science Educator
Exploratorium
Teacher Institute
3601 Lyon St.
San Francisco, CA 94123
415 561 0386

www.doscience.com

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