It looks like the article is online here 
http://www.physicstoday.org/vol-58/iss-6/p10.html

Larry Cochrane
Redwood City, PSN

Connie and Jim Lehman wrote:
> PSN folks--No doubt there will be sources hashing and re-hashing for some time, the disasterous quake-12/26/04 and resulting tsunamis.  In the current June issue of Physics Today,  David Stevenson of Cal Tech has a two  page summary of the dynamics of the rupture, the tremendous energy released, and the physics of how it played out.
>   This is worthwhile reading for anyone who copies events, and wishes to know more about what is happening at the source in a big  oceanic event.                                Jim
> 

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