Source scaling telationships of microearthquakes at Parkfield, CA, determined using the SAFOD pilot hole seismic array
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Abstract
Weestimate thesourceparametersof34microearthquakes at Parkfield,CA,ranginginsizefromM-0.2 toM2.1, byanalyzingseismogramsrecorded bythe32-level, 3-componentseismic arrayinstalled in theSAFODPilotHole. Wesucceeded in obtainingstablespectral ratios by stacking theratioscalculatedfromthemovingwindowstakenalongtherecordfollowingthedirectwaves.Thesespectral ratios were modeledtodetermine seismicmoments andcornerfrequenciesassuming an omega-squared model. Static stress dropsand apparent stresses ofmicroearthquakes at Parkfielddisplay moment-independent scaling in agreementwith scaling lawsreported for moderate and large earthquakes. It is likely that thedynamics of microearthquakes at Parkfieldis macroscopicallysimilar to that oflarger tectonic earthquakes.
Suggested Citation
Imanishi, K., Ellsworth, W.L., 2006, Source scaling telationships of microearthquakes at Parkfield, CA, determined using the SAFOD pilot hole seismic array, chap. of Earthquakes: Radiated energy and the physics of faulting, p. 81-90, https://doi.org/10.1029/170GM10.
Study Area
| Publication type | Book chapter |
|---|---|
| Publication Subtype | Book Chapter |
| Title | Source scaling telationships of microearthquakes at Parkfield, CA, determined using the SAFOD pilot hole seismic array |
| DOI | 10.1029/170GM10 |
| Year Published | 2006 |
| Language | English |
| Publisher | American Geophysical Union |
| Contributing office(s) | Earthquake Science Center |
| Description | 10 p. |
| Larger Work Type | Book |
| Larger Work Subtype | Monograph |
| Larger Work Title | Earthquakes: Radiated energy and the physics of faulting |
| First page | 81 |
| Last page | 90 |
| Country | United States |
| State | California |
| City | Parkland |