Electronic Supplement to
The 14 November, 2001 Kokoxili (Kunlunshan), Tibet, earthquake:
Rupture transfer through a large extensional step-over
by M. Antolik, R. E. Abercrombie, and G. Ekström
Waveform fits to teleseismic body waves
These three figures show the observed and synthetic waveforms obtained from the point-source inversions for teleseismic
P and SH waveforms at all of the stations used in the analysis. Pulse A, discussed in the text, is prominent
on the P-wave records within the first 20 s at all stations to the west and southwest from the source.
This pulse has negligible amplitude at stations to the northeast which indicates a change in focal
mechanism during the earthquake rupture. While the main portion of the P waves and the SH waveforms
can be adequately fit using a model with fewer sources [Figure 1 and Figure 2],
only the 3-subevent model [Figure 3], which includes an oblique normal-faulting subevent within the first 20 s, can fit Pulse A at stations where it contains
significant energy.
Figures
Figure 1. P and SH observed waveforms and synthetics for the single-source model. Synthetics are dashed.
All the records used in the
analysis are shown. Symbols are similar to Figures 3, 5, and 6 of the text. Vertical lines denote beginning and end
of the time window used, and arrows indicate the picked onset time for each station. The numbers above each station
identifier indicate the maximum amplitude of each trace in microns. Pulses A and B, as discussed in the text, are marked
on the bottom two P wave records
Figure 2. P and SH observed waveforms and synthetics for the two-subevent model. The focal mechanisms
and source time function shown are for the first subevent only (this focal mechanism was fixed as discussed in the
text). Other symbols are the same as in Figure 1.
Figure 3. P and SH observed waveforms and synthetics for the three-subevent model. The focal mechanisms
and source time function shown are for the second (oblique) subevent only. Other symbols are the same as in Figure E1.
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