[Danae]

Looking at that Webicorder... the whole land mass IS STILL MOVING. See that long wave form on the red line? Yea, thats movement, the plate was moving and in a relatively free manner. Thats actually good news if correct, it will let the pressure out with out the huge shock of sudden movement.

This one rung the earth like a bell again.

[winoneforthegipper]

These are two excellent gifs that dramatize the effects of a shear wave.

http://upload.wikimedia.org/wikipedia/commons/6/6d/Onde_cisaillement_impulsion_1d_30_petit.gif

http://upload.wikimedia.org/wikipedia/commons/3/31/Ondes_cisaillement_2d_20_petit.gif