Speaker
Description
We combine seismic and tectonic approaches to apply the empirical relationships between fault parameters and magnitudes to assess the maximum magnitude for the prediction of intensity motion. The Talysh area in southern Azerbaijan, with 3960 km², 38054'N and 48035'E, spreads to the north through the Alborz mountains of Iran. The earthquakes are concentrated mainly in the central part of the Talysh (up to 70 km) and in the southwestern part of the Caspian Sea (up to 55 km), with the local magnitude of up to M5.5. The earthquake magnitudes calculated on the basis of the surface fault length were compared with the catalogued magnitudes. (1) a comprehensive catalogue of faults was compiled; (2) earthquake magnitude is derived from fault length, downdip rupture width; (3) the resulting fault-length-earthquake-magnitudes were compared by the math difference with catalogued earthquake magnitudes; and (4) intensity simulation of ground motion on near-fault areas was plotted. The results show the approximate consistence of the calculated fault-length-earthquake-magnitude with the catalogued seismicity. The highest intensity areas of VII are observed in the central and western parts. An intensity VI covers the majority of the Talysh zone. The results will contribute to implementing more solid analyses for advancing seismic hazard analysis.
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