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Kinematic rupture simulations of earthquakes on multi-segment faults

Jorge G. Crempien, & Ralph J. Archuleta

Published August 15, 2018, SCEC Contribution #8655, 2018 SCEC Annual Meeting Poster #017

The presence of bends or multiple faults in the earthquake rupture process significantly affects the spatial seismic-moment distribution per segment and the time evolution of the rupture front. Because of this, it is clear that multi-segment rupture complexity will greatly affect the spatial radiation of ground motion in the vicinity of the faults. Using the UCSB method for computing broadband synthetics (Schmedes et al., 2013; Crempien and Archuleta, 2015), we compare synthetic and recorded ground motion from several earthquakes (1992 Landers, 1999 Hector Mine, 1999 Chi-Chi) that ruptured on multiple faults. We use acceleration response spectra at several periods of engineering interest to compare observed and synthetic ground motions. We also compare the ground motion variability obtained by Crempien and Archuleta (2017) to the multi-segment ground motion simulations. Preliminary results show a slight increase of both between-events and within-events standard deviations for multi-segment faults.

Crempien, J. G., & Archuleta, R. J. (2018, 08). Kinematic rupture simulations of earthquakes on multi-segment faults . Poster Presentation at 2018 SCEC Annual Meeting.

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