Journal cover Journal topic
Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
Nat. Hazards Earth Syst. Sci., 17, 397-407, 2017
https://doi.org/10.5194/nhess-17-397-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
13 Mar 2017
Control spectra for Quito
Roberto Aguiar1,2, Alicia Rivas-Medina1,3, Pablo Caiza1, and Diego Quizanga4 1Departamento de Ciencias de la Tierra y la Construcción, Universidad de Fuerzas Amadas ESPE, Quito, Ecuador
2Universidad Laica Eloy Alfaro de Manabí, Manabí, Ecuador
3Departamento de Cs. Geodésicas y Geomática, Universidad de Concepción – Campus Los Ángeles, Los Ángeles, Chile
4Departamento de Ingeniería Civil, Escuela Politécnica Nacional, Quito, Ecuador
Abstract. The Metropolitan District of Quito is located on or very close to segments of reverse blind faults, Puengasí, Ilumbisí–La Bota, Carcelen–El Inca, Bellavista–Catequilla and Tangahuilla, making it one of the most seismically dangerous cities in the world. The city is divided into five areas: south, south-central, central, north-central and north. For each of the urban areas, elastic response spectra are presented in this paper, which are determined by utilizing some of the new models of the Pacific Earthquake Engineering Research Center (PEER) NGA-West2 program. These spectra are calculated considering the maximum magnitude that could be generated by the rupture of each fault segment, and taking into account the soil type that exists at different points of the city according to the Norma Ecuatoriana de la Construcción (2015). Subsequently, the recurrence period of earthquakes of high magnitude in each fault segment is determined from the physical parameters of the fault segments (size of the fault plane and slip rate) and the pattern of recurrence of type Gutenberg–Richter earthquakes with double truncation magnitude (Mmin and Mmax) is used.

Citation: Aguiar, R., Rivas-Medina, A., Caiza, P., and Quizanga, D.: Control spectra for Quito, Nat. Hazards Earth Syst. Sci., 17, 397-407, https://doi.org/10.5194/nhess-17-397-2017, 2017.
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Short summary
In the Metropolitan District of Quito is located on or very close to five segments of reverse blind faults. The city is divided into five areas: south, south-central, central, north-central and north. For each of the urban areas, elastic response spectra are calculated considering the maximum magnitude. Subsequently, the recurrence period of earthquakes of maximum magnitude are presented.
In the Metropolitan District of Quito is located on or very close to five segments of reverse...
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