Strong evidence for non-similar earthquake source scaling in central Italy

Details Strong evidence for non-similar earthquake source scaling in central Italy Strong evidence for non-similar earthquake source scaling in central Italy

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3517303m&link_type=abstract

Geophysical Research Letters, Volume 35, Issue 17, CiteID L17303

Physics

9

Seismology: Earthquake Dynamics (1242), Seismology: Earthquake Ground Motions And Engineering Seismology, Seismology: Earthquake Source Observations (1240)

Scientific paper

The scaling of earthquakes of the Central Apennines (Italy) is investigated using broadband seismograms from the Colfiorito sequence (4 <= M W <= 6). Our results are not consistent with self-similar scaling, and can be described by the following relationship: M 0 $\propto$ f c -(3 + $\varepsilon$ ), where $\varepsilon$ = 1.7 +/- 0.3. We speculate that dynamic fault lubrication by fluid pressurization may be responsible for such extreme behavior, and use our results for the calibration of a weak-motion-based predictive relationship for the ground motion (M W <= 4.1) up to M W ~ 6 for this region.

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