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Fault geometry and slip distribution of the 1999 Chi‐Chi, Taiwan Earthquake imaged from inversion of GPS data
Author(s) -
Johnson Kaj M.,
Hsu YaJu,
Segall Paul,
Yu ShuiBeih
Publication year - 2001
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2000gl012761
Subject(s) - geology , seismology , slip (aerodynamics) , global positioning system , geodesy , fault plane , surface rupture , inversion (geology) , fault (geology) , geometry , tectonics , physics , mathematics , telecommunications , computer science , thermodynamics
GPS measurements of coseismic displacements from the 1999, Chi‐Chi, Taiwan earthquake are modeled using elastic dislocation theory. We find that a single fault plane cannot fit the data, but rather a curved fault surface consisting of multiple segments dipping 20–25° best fits the observations. The model fault exhibits reverse and left‐lateral slip on a 75 km long N‐S trending segment and reverse and right‐lateral slip on a 25 km E‐W trending segment at the northern end of the rupture. The 21° dipping E‐W segment is inconsistent with previous interpretations of high angle tear faulting.