Source Rupture Process of the Tottori-ken Seibu earthquake of Oct. 6, 2000
Joint inversion
was made using strong-ground-motion data
(provided by K-net and Kik-net (NIED)) and teleseismic data (provided by IRIS-DMC).
Rupture propagated upward and bilaterally. Main rupture started 2.5 sec
after initial break and
Major slip occurred in a depth range of 3 - 9 km and a fault length of about 20 km.
This depth range is consistent with depth phase of teleseismic body wave.
The seismic moment Mo = 1.1e19 Nm (Mw 6.6)
the source duration T = 9 s
the maximum dislocation is about 3.4 m.
Fault mechanism: (Strike, Dip, Slip)=(150, 87, 1)
Hypocenter: (35.275 N 133.35 E, Depth 11. km) [Fix].
(Yagi and Kikuchi, 2000)
Distribution of fault-slip
Fig. 1 : Focal mechanism; Total moment-rate function; Distribution of coseismic slip.
Star indicates the location of the initial break.
Snap shot of slip
Fig. 2 : Snapshots of the interval dislocation.
Station Distribution
Waveform comparison
Black: Observation, Red: Calculation
Velocity (0.05 - 0.5 Hz)
Black: Observation, Red: Calculation
displacement
If you have questions,
please send to yuji@eri.u-tokyo.ac.jp or kikuchi@eri.u-tokyo.ac.jp.