Astronomy and Astrophysics – Astronomy
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007geoji.169..667h&link_type=abstract
Geophysical Journal International, Volume 169, Issue 4, pp. 667-674.
Astronomy and Astrophysics
Astronomy
12
Chengkung Earthquake, Chihshang Fault, Coseimic Deformation, Taiwan
Scientific paper
A moderate earthquake of Mw = 6.8 occurred on 2003 December 10. It ruptured the Chihshang Fault in eastern Taiwan which is the most active segment of the Longitudinal fault as a plate suture fault between the Luzon arc of the Philippine Sea plate and the Eurasian plate. The largest coseismic displacements were 13 cm (horizontal) and 26 cm (vertical). We analyse 40 strong motion and 91 GPS data to model the fault geometry and coseismic dislocations. The most realistic shape of the Chihshang fault surface is listric in type. The dipping angle of the seismic zone is steep (about 60°-70°) at depths shallower than 10 km and then gradually decreases to 40°-50° at depths of 20-30 km. Thus the polygonal elements in Poly3D are well suited for modelling complex surfaces with curving boundaries. Using the strong motion data, the displacement reaches 1.2 m dip-slip on the Chihshang Fault and decreases to 0.1 m near surface. The slip averages 0.34 m, releasing a scalar moment of 1.6E26 dyne-cm. For GPS data, our model reveals that the maximal dislocation is 1.8 m dip-slip. The dislocations decrease to 0.1 m near the surface. The average slip is 0.48 m, giving a scalar moment of 2.2E26 dyne-cm. Regarding post-seismic deformation, a displacements of 0.5 m were observed near the Chihshang Fault, indicating the strain had not been totally released, as a probable result of near-surface locking of the fault zone.
Angelier Jacques
Chen Horng-Yue
Chen Hui-Hsuan
Chen Yue-Gau
Cheng Li-Wei
No associations
LandOfFree
Coseismic deformation revealed by inversion of strong motion and GPS data: the 2003 Chengkung earthquake in eastern Taiwan does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Coseismic deformation revealed by inversion of strong motion and GPS data: the 2003 Chengkung earthquake in eastern Taiwan, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coseismic deformation revealed by inversion of strong motion and GPS data: the 2003 Chengkung earthquake in eastern Taiwan will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-767832