SCEC Award Number 20198 View PDF
Proposal Category Individual Proposal (Data Gathering and Products)
Proposal Title Measuring ongoing postseismic deformation of the Ridgecrest earthquakes and updating GPS site positions in the Mojave Desert for the Community Geodetic Model
Investigator(s)
Name Organization
Gareth Funning University of California, Riverside
Other Participants Astrid Garcia
SCEC Priorities 3b, 1a, 2a SCEC Groups Geodesy, CXM, SDOT
Report Due Date 03/15/2021 Date Report Submitted 11/14/2024
Project Abstract
 The goal of this project was to continue our existing field GPS surveys in the area surrounding
the 2019 Ridgecrest earthquakes – to measure the ongoing postseismic deformation, and
constrain the local lithospheric rheology. These data will ultimately be incorporated into the
Community Geodetic Model, used to inform the Community Rheological Model, and used in the
estimation of fault slip rates. However, due to COVID-19 restrictions on travel, we were unable
to complete fieldwork for several months, meaning that the fieldwork only started in earnest in
the Spring of 2021, and continued into the Fall.
Intellectual Merit We collected survey GNSS data at 17 sites in April, September and December 2021 in the vicinity of the 2019 Ridgecrest earthquakes. These data can be used to model any potential postseismic afterslip and/or viscous relaxation following the 2019 events.
Broader Impacts The project involved the training of new graduate student, Karlee Rivera, a female Hispanic student, in GNSS fieldwork.
Exemplary Figure Figure 1: Campaign GPS sites measured in the vicinity of the Ridgecrest earthquakes by various groups (colored symbols). We aim to resurvey all of the UCR sites (red circles) and any sites not currently occupied by Scripps (blue triangles).
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