FIGURE 5.13 Recorded near-fault acceleration and velocity time histories and acceleration response spectra of the 1994 Northridge earthquake (top) and 1995 Hyogo-ken Nanbu earthquake (bottom), showing pulse-like motion on the strike-normal component of motion, which is much larger than the strike-parallel component at periods longer than about 0.4 second. SOURCE: P. Somerville, URS Corporation.

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