Non-volcanic tremor and low-frequency earthquake swarms

David R. Shelly (), Gregory C. Beroza and Satoshi Ide
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David R. Shelly: 397 Panama Mall, Stanford University, Stanford, California 94305-2215, USA
Gregory C. Beroza: 397 Panama Mall, Stanford University, Stanford, California 94305-2215, USA
Satoshi Ide: University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan

Nature, 2007, vol. 446, issue 7133, 305-307

Abstract: Many a slip Extended-duration seismic signals occur episodically on some major faults, often in conjunction with aseismic or 'slow-slip' earthquake events. The mechanism underlying this tremor and its relationship to the aseismic slip are as yet unresolved. David Shelley et al. demonstrate that tremor beneath Shikoku, Japan can be explained as a swarm of small, low-frequency earthquakes, each of which occurs as shear faulting on the subduction zone plate interface. This suggests that tremor and slow slip are different manifestations of a single process.

Date: 2007
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DOI: 10.1038/nature05666

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