Results of Rupture Process for
January 26, 2001 Western India Earthquake (Ms 7.9) (Revised on March 9, 2001)
The seismic moment Mo = 2.6 x 10**20 Nm (Mw 7.5);
The source duration T = 20 s;
Fault mechanism: (Strike, Dip, Slip)=(276, 33, 105) :(Fix) ;
Hypocenter: (lat.= 23.4N, lon.= 70.3E, depth= 18 km).
The source process is characterized by a unilateral rupture propagation.
The rupture mainly propagated 40 km to the west.
The maximum dislocation is about 6.0 m.
(Yagi and Kikuchi, 2001)
Distribution of fault-slip
Fig. : (upper left) Focal mechanism; (upper middle) Total moment-rate function; (lower) Distribution of coseismic slip. Star indicates the location of the initial break.
Snapshot of fault-slip
Fig. : Snapshots of the interval dislocation.
Fig. : Map view of slip distribution. Hypocenter of the main-shock determined by USGS.
Blue lines represent the extent of the fault plane used in our inversion.
Fig. : Comparison of the observed waveform (Black) with the
calculated waveform (Red). The numbers below the station code
indicate maximum amplitude in microns.
The start time of the traces is
lined-up at 10 (s) before the P- arrival.
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Last Updated: March 9, 2001