Fault Geometry and Stress Release Pattern of the 1995 Idyogo-ken Nanbu Earthquake, Japan Estimated by Inversion of GPS Data
1997 Volume 43 Issue 2 Pages 33-43
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1997 Volume 43 Issue 2 Pages 33-43
Fault plane parameters of the 1995 Hyogo-ken Nanbu earthquake (M=7.2) are esti mated from an inversion of GPS data, which reveals that the earthquake fault is charac terized by right-lateral strike slip (1.3±0.2 m) with a length of 32.8±1.0 km, a width of 14.7±1.0 km, a dip angle of 84.3°+1, 0°, a depth of 14.7±0.5 km, and a strike direction of 48.8°±1.0°. These results are roughly consistent with deductions made from seismic wave data and show good agreement with the distribution of aftershocks projected on the ground surface and in depth. Based on this fault model, we calculated the stress changes around the source region and found a significant stress concentration on the northeastern part of the rupture plane, which is responsible for the severe disruption that took place within the Belt of Damage and might have induced ruptures of sub-faults beneath the Kobe area.
