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Determination and Interpretation of Earthquake Source Locations in Sichuan Province, Chinaby Submitted to the Department of Earth, Atmospheric, and Planetary Sciences on {Date} in partial fulfillment of the requirements for the degree of Master of Science ABSTRACT
This thesis involves locating and interpreting earthquakes from the Sichuan
Province, China. The main contributions of this research are: successfully
fitting the travel time data of three explosions to a two-layer crust model;
and the improvement in locating earthquakes. To achieve these objectives,
the Gauss-Newton method is applied iteratively to find the nonlinear least
squares solution. The Monte Carlo method and the Gauss-Newton method were
jointly used to locate events and simultaneously optimize crust model. Iterative
station correction method is adopted to compensate the incorrectness of
the velocity model and to improve the event locations. The joint master
event method can improve the location of the events near the master event.
The modified Hypoinverse not only can locate events based on spherical
crust model, but can also jointly improve the crust model used. Three
dimensional crust model is next to be optimized and to improve the event
locations further more.
We also present some geological interpretation about the earthquake locations
in Sichuan and their tectonic implications.
Return to Theses Return to ERL Home Updated: May 31, 2002
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