HR: 1340h
AN: S43A-1045    [Abstracts]
TI: 2006 Taiwan PingTung Aftershocks Locations and Preliminary Tomography from OBS Data
AU: * Liao, Y
EM: yencheliao@gmail.com
AF: Institute of Geophysics, National Central University, Taiwan, No.300, Jhongda Rd., Jhongli City, Taoyuan County 32001, Taiwan (R.O.C.), Jhongli, 32001, Taiwan
AU: Hsu, S
EM: hsu@ncu.edu.tw
AF: Institute of Geophysics, National Central University, Taiwan, No.300, Jhongda Rd., Jhongli City, Taoyuan County 32001, Taiwan (R.O.C.), Jhongli, 32001, Taiwan
AU: Lee, C
EM: leecs@mail.ntou.edu.tw
AF: Institute of Applied Geosciences National Taiwan Ocean University, Taiwan, 2, Pei-Ning Road, Keelung, Taiwan 20248, R.O.C, Keelung, 20248, Taiwan
AU: Chang, C
EM: gensin@scman.cwb.gov.tw
AF: Central Weather Bureau, Taiwan, No. 64, Gongyuan Road, Taipei, Taiwan 10048, R.O.C., Taipei, 10048, Taiwan
AB: An array of 11 portable Ocean Bottom Seismometers (OBS) was deployed to collect aftershock sequences of two 6.9ML main-shocks occurred on December 26, 2006, off PingTung, Taiwan. One day after the main shocks, more than four hundreds aftershocks with magnitude larger than 2Mb were relocated from these OBSs records. According to the northern portion of the clustered aftershocks, the fault plane of the second main shock is trending NW-SE strike with a high angle westward dip. In contrast, the distribution of the southern portion of the aftershocks corresponds to a low angle westward dipping fault plane. Our preliminary tomographic results show that a high/low P-wave velocity boundary in NW-SE direction exist in the deeper offshore region and propagates to northeastward with increasing depth. It was supposed the high P-wave velocity zone can be associated with the subducting slab of the Eurasia plate.
DE: 7200 SEISMOLOGY
DE: 7230 Seismicity and tectonics (1207, 1217, 1240, 1242)
DE: 7270 Tomography (6982, 8180)
SC: Seismology [S]
MN: 2007 Fall Meeting