Scaling relationship between the duration and the amplitude of non-volcanic deep low-frequency tremors

Details Scaling relationship between the duration and the amplitude of non-volcanic deep low-frequency tremors Scaling relationship between the duration and the amplitude of non-volcanic deep low-frequency tremors

Apr 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3407305w&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 7, CiteID L07305

Physics

10

Seismology: Earthquake Dynamics (1242), Seismology: Subduction Zones (1207, 1219, 1240), Structural Geology: Role Of Fluids, Tectonophysics: Subduction Zone Processes (1031, 3060, 3613, 8413)

Scientific paper

We investigate a duration-amplitude relation of non-volcanic deep low-frequency (DLF) tremors in the Tokai region, southwest Japan, to constrain the source process of the tremors. We apply two models to the distribution, one is an exponential model as a scale bound distribution and the other a power law model as a scale invariant distribution. The exponential model shows a better fit to the duration-amplitude distribution of the tremors than a power law model, implying that the DLF tremors are caused by a scale-bound source process. The source process of the DLF tremors, therefore, differs from those for earthquakes. We suggest that the non-volcanic DLF tremor is possibly caused by a fixed source dimension with variable excess pressure of fluid or variable stress drop.

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