Unlike previous earthquakes such as San Francisco in 1906, when the plates shifted a maximum of 6.4 M (21ft) relative to each other no fault plane or rifting was evident at the surface in the 1989 Loma Prieta, California, area. Instead, the fault plane suggested in Figure12.19 shows the two plates moving horizontally approximately 2 m(6ft) past each other deep below the surface, with the Pacific plate thrusting 1.3 m upward.