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Publications in Scientific Journals:

H. Yao, P. Gerstoft, P. M. Shearer, C. Mecklenbräuker:
"Compressive sensing of the Tohoku-Oki Mw 9.0 earthquake: Frequency-dependent rupture modes";
Geophysical Research Letters, 38 (2011), L20310; 1 - 5.



English abstract:
Compressive sensing (CS) is a technique for finding sparse signal reapersentations to underdetermined linear measurement equations. We use CS to locate seismic sources during the rupture of the 2011 Tohoku-Oki Mw9.0 earthquake in Japan from teleseismic P waves recorded by an array of stations in the United States. The seismic sources are located by minimizing the l2-
10 norm of the difference between the observed and modeled waveforms penalized by the l1-norm of the seismic source vector. The resulting minimization problem is convex and can be solved efficiently. Our results show clear frequency-dependent rupture modes with high-frequency energy radiation dominant in the down-dip region and low-frequency radiation in the up-dip region, which may be caused by differences in rupture behavior (more intermittent or continuous) at the slab interface due to heterogeneous frictional properties.

Keywords:
sparse reconstruction, lasso, compressive sensing, sensor signal processing


"Official" electronic version of the publication (accessed through its Digital Object Identifier - DOI)
http://dx.doi.org/10.1029/2011GL049223

Electronic version of the publication:
http://www.agu.org/journals/gl/gl1120/2011GL049223/2011GL049223.pdf


Created from the Publication Database of the Vienna University of Technology.