Preliminary Results of Rupture Process for
November 16, 2000 New Ireland Region, Papua New Guinea Earthquake
Inversion was made using teleseismic data (provided by IRIS-DMC)
We retrieved teleseismic body waves (P-waves and S-wave) data recorded at
IRIS-dmc stations via Internet. 14 stations were used in the
We assumed a reference fault model :(strike, dip, rake) = (143, 83, 2)
which is inferred from Teleseismic body wave analysis
(EIC Seismological Note)
The seismic moment Mo = 1.6 x 10**21 Nm (Mw 8.1);
The source duration T = 70 s;
Fault mechanism: (Strike, Dip, Slip)=(145, 84, -5) ;
Hypocenter: (lat.= 3.97S, lon.= 152.32E, depth= 35 km) [Fix].
The source process is characterized by a unilateral rupture
propagation. The maximum slip amounts to 10 m
at about 130 km Southeast from the
(Yagi and Kikuchi, 2000)
Distribution of fault-slip
Fig. 1 : (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. 2 : Snapshots of the interval dislocation.
Fig. 3: Hypocenter of the main-shock determined by USGS.
Blue lines represent the extent of the fault plane used in our inversion.
Fig. 4 : 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- or S-wave arrival.
Fig. 5 : Telesesimic stations used in our inversion (Azimuthal Equidistant Projection).
The star represents the epicenter of the main-shock.
Fig. 6 : Slip distribution of the second large aftershock (2000/11/17).
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Last Updated: 2000 December 12