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Probabilistic macroseismic hazard assessment for Nicaragua (preliminary results)

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Abstract

A probabilistic macroseismic hazard assessment has been done for Nicaragua. For this, the most complete catalogue for Central America, compiled by NORSAR in Norway has been used. In this catalogue, empirical intensity attenuation relations were found. Using these empirical relations, magnitudes were changed to epicentral intensities expected in sites where no intensities had been reported. The calculated intensities from a polygon surrounding Nicaragua were used to assess the macroseismic hazard in the region. For the whole polygon, the cumulative intensity frequency was calculated resulting in a b-value of 0.60 for an intensity interval of V–IX. The time completeness was also studied indicating that, for strong events causing higher intensities (I 0 ≥ VII), the catalogue is complete for events that have been recorded since 1840. The whole polygon was cut into independent seismotectonic regions where the statistical procedure (intensity frequency and time completeness) was done.

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Espinosa, S. Probabilistic macroseismic hazard assessment for Nicaragua (preliminary results). Nat Hazards 13, 179–202 (1996). https://doi.org/10.1007/BF00138482

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  • DOI: https://doi.org/10.1007/BF00138482

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