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by O. Bonamassa, H. Houston and J.E. Vidale
Bonamassa, O., H. Houston and J.E. Vidale (1992). Comparison of Strong Motion and Weak Motion Recordings of the Loma Prieta Sequence. SMIP92
Seminar on Seismological and Engineering Implications of Recent Strong-Motion Data, p. 3-1 - 3-10.
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Abstract
The Loma Prieta earthquake sequence has provided the opportunity to compare ground motion
recorded both during an magnitude 7 mainshock and numerous magnitude 2.5 to 4.5 aftershocks at
14 sites. We find two results, (1) weak motion recordings of aftershocks have predictive power
to indicate the directionality of the shaking in the mainshock, and (2) non-linearity during
mainshock strong motions is suggested at the sites that suffered the largest accelerations in
the mainshock.
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