Slow rupture of an aseismic fault in a seismogenic region of Central Italy

Details Slow rupture of an aseismic fault in a seismogenic region of Central Italy Slow rupture of an aseismic fault in a seismogenic region of Central Italy

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29x..72a&link_type=abstract

Geophysical Research Letters, Volume 29, Issue 24, pp. 72-1, CiteID 2219, DOI 10.1029/2002GL016027

Mathematics

Logic

4

Seismology: Earthquake Dynamics And Mechanics, Seismology: Seismic Hazard Assessment And Prediction, Seismology: Seismicity And Seismotectonics

Scientific paper

Slow earthquakes and afterslips prove that the Earth does not have just two response time scales, i.e. that of tectonic loading and that of regular earthquakes. A swarm of slow earthquakes, with time constants of the order of hundreds of seconds, has been detected by a laser interferometer below the Gran Sasso massif (Italy). We analyse and model these observations to identify a very plausible source in a local fault, with no historic seismic behavior. While slow earthquakes occurring in subduction zones, and at the transition between locked and stably sliding segments of the San Andreas fault, are often associated with seismic events, in the case of the Apennines there is no correlation between local seismicity and slow earthquakes. Slow earthquakes, therefore, may also represent a specific failure behavior for a seismically locked fault, adding further complexity to the interpretation of geologic data for seismic hazard estimates.

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