SCEC Award Number 17247 View PDF
Proposal Category Individual Proposal (Integration and Theory)
Proposal Title Validation of the UCSB Multi-Segment Kinematic Rupture Simulation Method Against Recorded Ground Motion for Several Events
Investigator(s)
Name Organization
Ralph Archuleta University of California, Santa Barbara Jorge Crempien University of California, Santa Barbara
Other Participants
SCEC Priorities 4c, 4b, 2e SCEC Groups GM, EEII, CS
Report Due Date 12/31/2018 Date Report Submitted 01/07/2019
Project Abstract
 The main objective of this work is to determine rules to prescribe kinematic rupture models on multiple segment faults such that the generated ground motions resemble the ones reported by recordings on strong motion sensors and ground motion prediction equations (GMPE’s). As a secondary objective, we have determined that the ground motion between-events variability increases when considering multiple fault segments.
Intellectual Merit We have proposed a kinematic rupture model to compute ground motion from kinematic rupture models with multiple fault segments. The model we validated so far is the 1999 Hector Mine earthquake.
We have also determined that the between events variability increases when multiple faults segments are numerically modeled to rupture.
Broader Impacts The correct development of this kinematic rupture model will allow to compute ground motions for crustal fault systems with complex geometries, such as the San Andreas fault and others.
Exemplary Figure Figure (1): (a) In red we can see the map projections of the fault segments we considered in this preliminary modeling of the 1999 Hector Mine earthquake. On each colored inverted triangle, we show the location of very close stations to any portion of the fault segments that ruptured. (b) We show in grey lines the synthetic ground motions (response spectra) for 30 rupture scenarios at stations Amboy, Hector, Joshua Tree and Twentynine-Palms. Each colored line on the plots represents the observed response spectra at each station.