Supplementary Materials

Earthquake in a Maze: Compressional Rupture Branching During the 2012 Mw 8.6 Sumatra Earthquake

L. Meng, J.-P. Ampuero, J. Stock, Z. Duputel, Y. Luo, V. C. Tsai

Materials/Methods, Supporting Text, Tables, Figures, and/or References

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  • Materials and Methods
  • Figs. S1 to S8
  • References (31-36)

Images, Video, and Other Other Media

Movie S1
The movie shows the raw results of back-projection source imaging based on teleseismic
data from European networks. Warm colors indicate the positions of the high frequency
(0.5 to 1 Hz) radiation back-projected onto the source region based on IASP91 travel
times (36). The sliding window is 10-s long and the origin time is 08:38:37, 04-12-12
(UTC). The beginning of the sliding window is set to be 5 s before the initial P-wave
arrival. Colors indicate the amplitude of the MUSIC pseudo-spectrum on a logarithmic
scale (dB) after subtracting the background level and rescaling the maximum to the linear
beamforming power in each frame separately. The white star is the mainshock epicenter
and the green circles are the epicenters of the first day of aftershocks from the NEIC
catalog. Time relative to hypocentral arrival time is shown on top. The trench and
coastlines are shown by white curves.
Movie S2
Back-projection source imaging based on teleseismic data from Japanese networks.
Same convention as the previous movie.