Looking for undocumented earthquake effects: an application to Italian localities
| Autor: | Andrea Antonucci, Andrea Rovida, Vera D'Amico, Dario Albarello |
|---|---|
| Rok vydání: | 2023 |
| Zdroj: | XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) |
| DOI: | 10.57757/iugg23-2633 |
| Popis: | Integrating macroseismic intensity data recorded through time with those calculated from epicentral parameters with intensity prediction equations (IPEs) is an effective way of investigating the knowledge of the seismic history (i.e., the list of documented effects) of a given site and to estimate its representativeness. For this purpose, we calculated the effects that were not documented at a set of sites in Italy by considering an IPE constrained with intensity values documented at close sites for the same events.We first selected 228 localities according to their geographical distribution and to the number of related documented intensity data contained in the last version of the Italian Macroseismic Database DBMI15 and we then estimated the number of earthquake effects that could be potentially lost. The latter were calculated with a probabilistic approach in order to take into account both the uncertainties related to the assessment of the intensity value at the site and the nature of macroseismic data (ordinal, discrete, and range limited).We finally provided a quantitative estimate of the effects of known past earthquakes that can be considered potentially lost at the 228 sites analyzing the results at both the local (site-by-site) and regional scale. The results showed that at least one effect with intensity greater than or equal to 6 MCS could be potentially lost with a high probability at almost the totality of the investigated sites. Moreover, some geographical dependences and correlations with the intensity levels were identified. The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) |
| Databáze: | OpenAIRE |
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