IMAGES: Quake Surfing

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Science  21 Jul 2006:
Vol. 313, Issue 5785, pp. 277
DOI: 10.1126/science.313.5785.277a

Seismic waves from the magnitude-5.0 Big Bear earthquake rippled toward Los Angeles on the morning of 22 February 2003. Now you can screen movies showing the pattern of ground shaking, thanks to this new site from the California Institute of Technology in Pasadena. ShakeMovie's animations, which usually post about 45 minutes after a temblor, indicate the amount of up-and-down motion at the surface. The movies depict all southern California quakes of magnitude 3.5 and above and reflect computer simulations that integrate readings from thousands of seismograms. Visitors can also download maps that chart peak ground acceleration during the event. For movies of quakes dating back to 1999, visit the site's archive.

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