Mechanics and statistics of postseismic shaking
Geophysical Research Letters
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Abstract
Analysis of two weeks of continuous post-seismic shaking after the 2019 M7.1 Ridgecrest, CA earthquake sequence using 4 nearby borehole seismometers reveals that continuous ground motions decay as Omori’s law in time and follow the Gutenberg-Richter distribution in logarithmic amplitude. The measured temporal decay in amplitudes agrees with predictions of the rate-and-state framework and indicates shaking amplitudes are proportional to the velocity of afterslip. Our ground motion-based statistical framework provides a basis to forecast shaking intensity in the minutes to hours after a large earthquake.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Mechanics and statistics of postseismic shaking |
| Series title | Geophysical Research Letters |
| DOI | 10.1029/2025GL116673 |
| Volume | 52 |
| Issue | 18 |
| Publication Date | September 12, 2025 |
| Year Published | 2025 |
| Language | English |
| Publisher | American Geophysical Union |
| Contributing office(s) | Earthquake Science Center |
| Description | e2025GL116673, 10 p. |
| Country | United States |
| State | California |
| City | Ridgecrest |