The SCEC Earthquake Geology Database (EGD)

Scott T. Marshall, Alex Hatem, Sinan O. Akciz, Mei-Hui Su, Philip J. Maechling, Tran T. Huynh, & Edric Pauk

Published September 10, 2023, SCEC Contribution #13125, 2023 SCEC Annual Meeting Poster #195 (PDF)

The first version of the SCEC Earthquake Geology Database (EGD) was released in summer 2023. The EGD currently consists of spatially registered geologic fault slip rate estimates from previously published databases. The EGD covers a rectangular region that encompasses all of California, Nevada, and a small portion of northern Mexico. The EGD is a logical addition to the community datasets already hosted by SCEC, especially considering the importance of slip rate estimates for many research activities. Here we describe the SCEC EGD, an open-access, community driven, web-based platform and associated database that provides quick access to fault slip rate data. The USGS recently led an effort to compile published slip rate data along active faults in the western U.S. (Hatem et al., 2022) as part of the 2023 update to the U.S. National Seismic Hazard Model; this database also contains the slip rates compiled for the 3rd Uniform California Earthquake Rupture Forecast (Dawson and Weldon, 2013). The EGD is built from these slip rate compilations and enhances the source database by providing web-based tools for users to quickly query, download, and visualize the existing slip rate data. The web tools also allow users direct web links to the EGD references and the ability to upload their own spatial data (in .kml/.kmz format) to compare directly in the viewer with the EGD. To keep the EGD up to date when new data are published, the EGD homepage provides a user-submission tool for users to notify the EGD maintainers of new/missing slip rate data. To help tie the EGD to SCEC community models, we wrote an algorithm that cross-references EGD slip rate sites to the appropriate SCEC Community Fault Model object. Thus, while the EGD will begin with a subset of the Hatem et al. (2022) database, our goal is that the EGD will grow with time into a continually updated community database.

Key Words
slip rate, fault, earthquake geology, CXM, EGD, database, web tool

Citation
Marshall, S. T., Hatem, A., Akciz, S. O., Su, M., Maechling, P. J., Huynh, T. T., & Pauk, E. (2023, 09). The SCEC Earthquake Geology Database (EGD). Poster Presentation at 2023 SCEC Annual Meeting.

Related Projects & Working Groups
SCEC Community Models (CXM)