Transcript for Computer Animation of Loma Prieta Aftershocks, segment 04 of 12


The second Lake Ellsman earthquake on August eighth was a preshock to the Loma Prieta earthquake.


The Loma Prieta earthquake and its aftershocks dominate central California's seismicity for the next few months. The aftershocks define the length of fault rupture which extended about thirty-five kilometers. The animation will repeat the months of October and November a second time.


These are the basic facts of the Loma Prieta earthquake revealed by seismology and geodesy.


During the Loma Prieta earthquake, the Pacific Plate moved both laterally and upward relative to the North American Plate. The fault mechanism was oblique with both right lateral and overthrust components.

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