Probabilistic Seismic Hazard Assessment in the Peruvian Territory

Abstract eng:
This paper presents new probabilistic seismic hazard estimates for Peru. Available geological and seismological data have been used to evaluate and characterize twenty nine seismic sources. An earthquake catalog has been compiled covering the time span between 1555 to 2016 AD and for the area bounded by 66°W - 84°W and 4°N - 23°S. Ground motion prediction equations appropriate for subduction and crustal zones have been selected. Probabilistic seismic hazard maps have been derived for the Peruvian territory and depict peak horizontal ground acceleration and spectral response at 0.2, and 1.0 sec periods with 10 % and 2 % probabilities of exceedance in 50 years. The final result of this assessment consists of a Peruvian seismic hazard web application. This free application allows users to obtain seismic hazard curves: Annual Frequency of Exceedance vs Spectral Acceleration, Uniform Hazard Response Spectra, and Seismic Design Spectra for any location in Peru, in accordance with the Peruvian Seismic Code E-030, 2016[1]. and the IBC, 2015[2]. provisions. Calculations consider different damping coefficients and are obtained for a 0.1° longitudelatitude grid in the Peruvian territory. The hazard curves supplied by this application may be retrieved in CSV, XLS, TXT, PDF, and JPGE formats and can be used as a preliminary site-specific seismic hazard analysis.

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