Geologic and Tectonic Setting

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A Seismic Hazard Assessment (SHA) should include an evaluation of the local geologic and seismic setting of a region as it relates to the global tectonic setting. An understanding of the local geologic and seismic environments requires an interpretation of the seismotectonics and neotectonics of a region.

Seismotectonics is the study of the relationship between the earthquakes, active tectonics, and the individual faults of a region. Neotectonics is the study of the current or geologically-recent motions and deformations of the Earth's crust. By understanding the interaction between regional tectonics, recent (instrumentally-recorded) and historical earthquakes, and geomorphological evidence, the faults responsible for seismic activity of a region can be determined and used to quantify the seismic hazard of an area.

• Local Geologic Setting
• Local Tectonic Setting
• Velocity Structure

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Revision ID: 3816
Revision Date: 09/29/2022