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Li, "Earthquake location problems in eastern Taiwan," 1995

USC thesis in Security.
August 26, 2009

Cheng-Ping Li, M.S.

Abstract (Summary)
The SMART 2 and HTN arrays of eastern Taiwan recorded 3-component digital data in 1991. Due to the synchronization problem, the conventional location method using the first P-arrival time can not be applied. Since the S-arrival can be picked considerable accuracy using digital 3-component data, we attempt to locate earthquakes by using Ts-Tp only.

We seek the best solution in the least squares sense through a non-linear optimization process. A location program is developed and tested based on S-P intervals and 3-D ray-tracing programs. Results showed that the accuracy of relocation strongly depends on the station distribution, model definition, and the accuracy of P- and S-picking. The hypocenters were consistently shifted from east to west, implying a lower velocity underneath the island of Taiwan. The particle motion is used to discriminate the contradicting relocation results from different data sets.

Advisor: Teng, Ta-Liang



September 1, 2017 - 1:30pm
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Celebrating the grand reopening of USC Pacific Asia Museum after a year of the seismic retrofit project, the museum will present an exhibit drawn from the museum’s extraordinary collection of over 2,700 costumes and textiles from China, Korea, Japan, India, the Himalayas and Southeast Asia.