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| Figure 1.1b: Ground rupture along the northern trace of the Imperial Fault in southern California after the October 15, 1979 magnitude 6.5 earthquake. View is to the northwest along the rupture. The relative motion is dominantly dip slip (~20cm) down to the northeast. The older fault scarp indicates that several similar earthquake ruptures have occurred here in the recent past. Photograph by D. D. Pollard. | ||||
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