The engineering problem of understanding the collapse of a building during a major earthquake is greatly eased if the actual seismic motion on the site is known. Whenever a sufficient number of strong motion records is available, as in the case of the november 23, 1980 Irpina (Italy) earthquake, we can realistically simulate it for frequencies up to 1 Hz using “complete” synthetic seismograms. In our case we apply a normal mode summation technique. Through a simple minimization process we obtain a source model that reproduces the observed records. Then we use it to estimate the seismic ground motion at other sites. We also investigate the stability and uncertainties in our solution.
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- Uncertainties in the Estimate of Strong Ground Motion in the Surroundings of a Large Earthquake
Giuliano F. Panza
- Springer Netherlands