Accelerometric radiation simulation for the September 26, 1997 Umbria-Marche (Central Italy) main shocks

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A. Emolo
A. Zollo

Abstract

We applied a hybrid stochastic-deterministic method to simulate the strong ground motion characteristics associated with the September 26, 1997 Umbria-Marche main shocks. One hundred different rupture processes on previously inferred fault planes were simulated. The maps of computed PGA (mean values from 100 simulations) show a SE alignment for the 00:33 event and a NW alignment for the 09:40 event, in accordance with the macroseismic data. Moreover, we found a good agreement between the predicted 1ó interval for the PGA values and the data recorded at several accelerometric stations. As a further test, we computed the response spectra at the station Cerreto di Spoleto and found a satisfactory agreement with the synthetic results.

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Emolo A, Zollo A. Accelerometric radiation simulation for the September 26, 1997 Umbria-Marche (Central Italy) main shocks. Ann. Geophys. [Internet]. 2001Dec.25 [cited 2021Sep.28];44(3). Available from: https://www.annalsofgeophysics.eu/index.php/annals/article/view/3579
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