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Summary of Proposal MTH1778

TitleFeasibility ofapplying space-borne SAR for earthquake tectonic investigation
Investigator Hager, Manfred - DLR, Microwaves and Radar Institute, Department of Reconnaissance and Security
Team Member
Prof. Dr. Süß, Helmut - German Aerospace Center, Reconnaissance and Security
Dr. Speck, Rainer - German Aerospace Center, Reconnaissance and Security
Mr. Hager, Manfred - German Aerospace Center, Reconnaissance and Security
Prof. Kruse, Fred A. - Naval Postgraduate School NPS California USA, Physics Department and Remote Sensing Center
SummaryThe San Andreas Fault is typically described based on the characteristics of certain defined segments with similar characteristics. The “creeping segment of the San Andreas Fault” lies roughly between San Juan Bautista to the north and the “Parkfield segment” to the south (http://geology.about.com/od/geology_ca/ig/safparkfield/parkfieldmap.htm). This segment moves (constantly) around 3cm per year without rupture, usually to the accompaniment of minor earthquakes. The interaction here is very different from the Parkfield and “Central” segments which are characterized by stress release through moderate to large earthquakes. The Parkfield area, while sparsely populated, has had a series of notable historical quakes. The “central segment” from just south of Parkfield, through Palmdale to approximately Cajon Pass experienced a magnitude 8.0 earthquake in 1857, when the fault ruptured over a 300km long zone. This study will investigate the tectonics and differences in deformation style and rates associated with different portions of the San Andreas fault. Terra-SAR-X data will be used to determine fault movement and deformation over time for two areas, one near Parkfield, CA and the other near Palmdale, CA. A series of data acquisitions will allow high-resolution derivation and comparison of interferometric phase differences resulting from displacement on the fault. Trihedral corner reflectors will be placed at both sites for calibration purposes and field validation will be performed by the research team. The Terra-SAR-X studies will allow detailed characterization of motion and deformation rates and facilitate comparison of the two tectonic regimes.

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