Deterministic Ground Motion Simulation Using Realistic Source Models
Abstract
The characterization of the seismic source is of paramount importance in the strong motion prediction for seismic hazard assessment. In order to describe realistic scenarios for earthquake prone areas we model the effects of seismic moment distribution and rupture directivity around the seismic source. We use the modal summation technique together with different energy releases on the fault to compute a realistic ground motion field due to an earthquake. The method of the empirical Green functions is also applied to mimic both the site and source-receiver path response. The abilities and limits of using empirical Green functions to predict realistic ground motions are discussed. Our approach is validated through its application to three European earthquakes: the Friuli (Italy) 1976 May event and 1997 Umbria-Marche (Italy) seismograms are estimated through a direct computation, whereas the 1998 Bovec Krn Mountain (Slovenia) earthquake seismograms are inverted for the slip on the fault. Afterwards we estimate the ground motion due to two potential strong earthquakes in the Friuli and western Slovenia areas that might occur ontwoactivefaults. The results show that our modeling and estimation of the seismic input, when applied to different earthquake scenarios, can be a powerful, economically valid and easily applicable scientific tool for seismic hazard assessment purposes.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2001
- Bibcode:
- 2001AGUFM.S42C0657S
- Keywords:
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- 7212 Earthquake ground motions and engineering