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Relations among fault behavior, subsurface geology, and three-dimensional velocity models
Science (New York, N.Y.)
|August 9, 1991
Summary
Three-dimensional seismic velocity models reveal that fault behavior correlates with rock properties. High seismic velocities link to high moment release, while low velocities may indicate rupture initiation or termination, improving earthquake prediction.
Area of Science:
- Seismology
- Geophysics
- Earthquake Science
Background:
- Understanding fault behavior is crucial for earthquake prediction.
- Seismogenic depths involve complex rock-fault interactions.
Purpose of the Study:
- To develop 3D P-wave velocity models around California earthquakes.
- To investigate relationships between fault behavior and rock material properties.
Main Methods:
- Analysis of seismic wave velocities.
- Correlation of velocity data with earthquake moment release and rupture characteristics.
Main Results:
- High seismic velocities correlate with regions of high moment release.
- Lower seismic velocities are associated with earthquake rupture initiation or termination points.
Conclusions:
- Fault segmentation is linked to variations in seismic velocity and rock properties.
- These findings enhance physical understanding for improved earthquake and strong ground motion prediction.
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