Differential Tomography of the San Andreas Fault Zone at Parkfield
Abstract
Differential tomography is the method of estimating local characteristics of the media by using differential rather than integral formulation of the linearized inverse problem. Differential tomography operates directly on the computational grid and takes advantage of the fast methods for solving the eikonal equation. The Parkfield high resolution seismic network microearthquake data recorded during the past 14 years provided a unique opportunity to apply this method. For a preliminary 2-D application, we used just two stations MMN and EAD located the within San Andreas fault zone. For velocity tomography we applied picked P- and S- direct arrivals. Amplitude tomography involved the guided waves energy. The results show an improved image of the fault zone and suggest several possible extensions of the theory and the applications.
- Publication:
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AGU Spring Meeting Abstracts
- Pub Date:
- May 2001
- Bibcode:
- 2001AGUSM...S52A06F
- Keywords:
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- 3230 Numerical solutions;
- 3260 Inverse theory;
- 7205 Continental crust (1242);
- 7260 Theory and modeling