SCEC Award Number 11115 View PDF
Proposal Category Individual Proposal (Integration and Theory)
Proposal Title Incorporating Geodetic Surface Data into UCERF3: Estimating Slip Rates and Locking Depths
Name Organization
Kaj M. Johnson Indiana University
Other Participants Ray Chuang (IU grad student), Liz Hearn, Wayne Thatcher, Yuehua Zeng, David Sandwell, Ned Field
SCEC Priorities A2, A3, A1 SCEC Groups CDM, Geodesy, EFP
Report Due Date 02/29/2012 Date Report Submitted N/A
Project Abstract
In UCERF3, fault slip rates and off-fault strain rates estimated from inversions of GPS-derived velocities and geologic slip rates with kinematic models are largely replacing the expert opinion rates adopted in previous UCERF models. This SCEC grant funded my effort to develop deformation models for UCERF3 and coordinate the efforts of other deformation modelers. The term “Deformation Models” refers to slip rates on faults and distributed strain rates off of faults. There are four new Deformation Models for UCERF3 derived from models of GPS and geologic data. In this report I briefly describe the four deformation models and the kinematic models and inversions used to derive these models.
Intellectual Merit In this work I developed Deformation Models, and coordinate efforts by other PIs to develop Deformation Models, for UCERF3. The Deformation Models contain slip rates on faults and off fault strain rates that drive the rate of earthquake production in the UCERF3 model.
Broader Impacts This work contributed significantly to the development of UCERF3 which is a major effort supported by SCEC to quantify probabilistic earthquake hazard in the state of California.
Exemplary Figure Figure S1. Kinematically-consistent average of five block model estimates of strike-slip rates and off-fault moment rates in California. This is one of four new GPS-derived deformation models for UCERF3.