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The kinematics of faults in the San ...

Schmidt, David Andrew.

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The kinematics of faults in the San Francisco Bay area inferred from geodetic and seismic data.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The kinematics of faults in the San Francisco Bay area inferred from geodetic and seismic data./
作者:	Schmidt, David Andrew.
面頁冊數:	181 p.
附註:	Source: Dissertation Abstracts International, Volume: 64-02, Section: B, page: 0591.
Contained By:	Dissertation Abstracts International64-02B.
標題:	Geodesy. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3082393

The kinematics of faults in the San Francisco Bay area inferred from geodetic and seismic data.
Schmidt, David Andrew.

The kinematics of faults in the San Francisco Bay area inferred from geodetic and seismic data. - 181 p.

Source: Dissertation Abstracts International, Volume: 64-02, Section: B, page: 0591.

Thesis (Ph.D.)--University of California, Berkeley, 2002.

The work presented in this dissertation focuses on the kinematics and mechanics of the Hayward fault, the Loma Prieta earthquake rupture, and the Silver Creek fault. To better understand their behavior and geometry, geodetic and seismic data are used in conjunction with elastic models of the crust. Along the northern and central segments of the Hayward fault, a steady interseismic deformation rate is observed. Variations in this rate along strike suggest a variable slip-rate distribution at depth indicative of locked and creeping patches. A locked patch that correlates with the presumed source region of the 1868 earthquake on the Hayward fault implies that elastic strain is accumulating at this location. The southern Hayward fault exhibits complex time-dependent slip. Interferometric Synthetic Aperture Radar (InSAR) is employed to visualize the crustal deformation signal by utilizing over 100 interferograms. Results suggest that the observed surface deformation is best explained by a combination of transient fault slip and land subsidence. This is in contrast to the Silver Creek fault in the Santa Clara Valley where all of the deformation is attributed to differential aquifer compaction and expansion across the fault. Regional faults interact through the redistribution of stress in the crust and upper mantle. The effect of this change in stress on the creeping portion of the Hayward fault following the 1906 San Francisco earthquake is explored using a rate-and-state friction model. The predicted surface creep response, driven by the postseismic relaxation of the mantle following the 1906 event, is used to constrain the rheology of the lower crust. Rheologies that include a horizontal shear zone underpredict the surface creep response observed from offset cultural features. Inversions for the coseismic slip distribution of the 1989 Loma Prieta earthquake are performed to evaluate the sensitivity of the inversion to the prescribed fault geometry. Models the incorporate a dipping Loma Prieta fault and a vertical San Andreas are preferred over a single dipping plane. The findings presented in this thesis provide new insight on how active faults behave and interact throughout the earthquake cycle.Subjects--Topical Terms:

550741
Geodesy.

The kinematics of faults in the San Francisco Bay area inferred from geodetic and seismic data.
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245 1 4 $a The kinematics of faults in the San Francisco Bay area inferred from geodetic and seismic data.
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502 $a Thesis (Ph.D.)--University of California, Berkeley, 2002.
520 $a The work presented in this dissertation focuses on the kinematics and mechanics of the Hayward fault, the Loma Prieta earthquake rupture, and the Silver Creek fault. To better understand their behavior and geometry, geodetic and seismic data are used in conjunction with elastic models of the crust. Along the northern and central segments of the Hayward fault, a steady interseismic deformation rate is observed. Variations in this rate along strike suggest a variable slip-rate distribution at depth indicative of locked and creeping patches. A locked patch that correlates with the presumed source region of the 1868 earthquake on the Hayward fault implies that elastic strain is accumulating at this location. The southern Hayward fault exhibits complex time-dependent slip. Interferometric Synthetic Aperture Radar (InSAR) is employed to visualize the crustal deformation signal by utilizing over 100 interferograms. Results suggest that the observed surface deformation is best explained by a combination of transient fault slip and land subsidence. This is in contrast to the Silver Creek fault in the Santa Clara Valley where all of the deformation is attributed to differential aquifer compaction and expansion across the fault. Regional faults interact through the redistribution of stress in the crust and upper mantle. The effect of this change in stress on the creeping portion of the Hayward fault following the 1906 San Francisco earthquake is explored using a rate-and-state friction model. The predicted surface creep response, driven by the postseismic relaxation of the mantle following the 1906 event, is used to constrain the rheology of the lower crust. Rheologies that include a horizontal shear zone underpredict the surface creep response observed from offset cultural features. Inversions for the coseismic slip distribution of the 1989 Loma Prieta earthquake are performed to evaluate the sensitivity of the inversion to the prescribed fault geometry. Models the incorporate a dipping Loma Prieta fault and a vertical San Andreas are preferred over a single dipping plane. The findings presented in this thesis provide new insight on how active faults behave and interact throughout the earthquake cycle.
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