New features of rapid finite fault modeling at the National Earthquake Information Center
Dara Goldberg
USGS Geologic Hazards Science Center
- Date & Time
- Location
- Online-only seminar via Microsoft Teams
- Summary
Following a significant earthquake, the USGS National Earthquake Information Center (NEIC) publishes a spatiotemporal estimate of the earthquake’s slip pattern, known as a kinematic finite fault model. These models are critical to informing downstream response products such as ShakeMap ground motion estimates and PAGER loss estimates. Because large earthquakes can involve slip over tens to hundreds of kilometers along a fault, it is vital to rapidly assess the amount and location of slip along the fault. Since its introduction to NEIC’s rapid response capabilities in late 2007, the finite fault product has been computed in the first several hours after a significant earthquake using only teleseismic data, for which it is generally possible to obtain a reliable model for earthquakes of magnitude 7 and larger. In this talk, I will highlight some recent and anticipated updates to the NEIC’s rapid finite fault modeling capabilities to include regional-distance seismic and geodetic observations. These new features allow rapid modeling of earthquakes as small as magnitude 6, and reduce the overall time required to produce a reliable model of slip.
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