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Room: 204

Date: 4/20/2023

Session Time: 2:00 PM to 3:15 PM (local time)

Stress drop is a fundamental earthquake source parameter that in theory relates the average slip on a fault to rupture area, and in practice characterizes the high frequency seismic radiation. It is a key parameter in earthquake ground motion modeling, rupture simulation and source physics analysis. However, stress drops are notoriously variable and difficult to measure; estimates by different researchers using different methods or datasets yield inconsistent values which mask physical trends. We seek to bring together all interested researchers to compare and validate stress drop estimates, source characterization and high-frequency ground motion. We particularly encourage studies of the 2019 Ridgecrest Earthquake Sequence, any studies focused on the comparison of multiple methods, and studies aimed at quantifying the uncertainties in stress drop estimates. We hope to understand the physical controls and methodological reasons for similarity or differences in stress drops, so that they can be used reliably by the earthquake science community.

Conveners:

Colin N. Pennington, Lawrence Livermore National Laboratory (pennington6@llnl.gov)

Shanna Chu, U.S. Geological Survey (schu@usgs.gov)

Trey Knudson, Stanford University (trey05@stanford.edu)

Meichen Liu, University of Michigan (meichenl@umich.edu)

Ian Vandevert, University of California, San Diego (ivandevert@ ucsd.edu)

Rachel Abercrombie, Boston University (rea@ bu.edu)

Annemarie Baltay, U.S. Geological Survey (abaltay@ usgs.gov)

Kevin Mayeda, Air Force Technical Applications Center (kevin.mayeda@us.af.mil)

Taka’aki Taira, University of California, Berkeley (taira@berkeley.edu)

Kilian Kemna, Ruhr University Bochum (kilian.kemna@web.de)

Oral Presentations