Influence of focal mechanism on shape of isoseismals: Irpinia earthquake of November 23, 1980 |
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| Authors: | G F Panza M Cuscito |
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| Institution: | (1) Istituto di Geodesia e Geofisica, Università di Trieste, I-34100 Trieste, Italy |
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| Abstract: | With the use of complete synthetic seismograms for the SH component of motion we have constructed theoretical isoseismals. We have assumed a double-couple point source as determined from first arrivals of P waves. Lateral heterogeneities around the source were also considered. In fact, the crustal part of the model used to compute synthetic seismograms to the west of the Bradano foretrough was significantly different from the one used to synthesize seismograms to the east of the foretrough. Even with such a simple approach, the comparison between theoretical and experimental data is surprisingly good, indicating that the isoseismals' elongation, parallel to the Apennines, depends mainly upon the fault orientation, while the effect of local structures introduces relatively small perturbations in the radiation pattern.Publication n. 198 Istituto di Geodesia e Geofisica-Trieste. |
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| Keywords: | Synthetic seismograms Irpinia Earthquake of November 23 1980 Isoseismals Focal mechanism |
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