Seismic S -wave coda attenuation in the Dominican Republic as a tool for seismic hazard mitigation
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Seismic S‑wave coda attenuation in the Dominican Republic as a tool for seismic hazard mitigation David A. Novelo‑Casanova1 · Eugenio Polanco‑Rivera2 · Gerardo Suárez1 · Felix Martinez2 · Andrés M. Moreta2 Received: 3 February 2020 / Accepted: 4 June 2020 © Springer Nature B.V. 2020
Abstract High-quality waveforms of the vertical and horizontal components of 1356 seismic events recorded from 2013 to 2016 by the Dominican Republic’s seismic network, were analyzed to study the local spatial distribution of the coda frequency-dependent attenuation Qc(f)−1. Qc(f) was estimated at central frequencies of 1.5 (± 0.5), 3.0 (± 1.0), 6.0 (± 2.0), and 12.0 (± 4.0) Hz and interpreted by considering the single backscattering model. Our results of the attenuation of coda waves may explain why some regions of the Dominican Republic (DR) are more prone to suffer damage due to earthquakes than other areas. The majority of the cities and towns in the DR that were severely damaged by earthquakes in the past are located in zones of low and very low coda wave attenuation. In contrast, cities located in zones of high Qc(f)−1 tend to suffer less damage. Our findings identify regions with low seismic attenuation that reflect zones with soft soils that could be impacted by future large events in the DR. These results can be used as a tool for planning seismic hazard mitigation and emergency response as well as for land use regulations. Keywords S-wave coda · Seismic attenuation · Seismic hazard · Seismic hazard mitigation · Dominican Republic
1 Introduction The island of Hispaniola is located on the complex tectonic boundary between the North American and Caribbean tectonic plates (Mann et al. 1991). The relative plate motion between these two plates is approximately 2.0 cm/year. Hispaniola stands at the transition Electronic supplementary material The online version of this article (https://doi.org/10.1007/s1106 9-020-04105-6) contains supplementary material, which is available to authorized users. * David A. Novelo‑Casanova [email protected] 1
Instituto de Geofísica, Departamento de Sismología, Universidad Nacional Autónoma de Mexico, Col. Ciudad Universitaria, Delegación Coyoacán, Ciudad de México 04510, Mexico
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Centro Nacional de Sismología, Universidad Autónoma de Santo Domingo, José Dolores Alfonseca, Edificio Sismológico, Ciudad Universitaria, Zona Universitaria, Santo Domingo, D.N. C.P. 10105, República Dominicana
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between the subduction zone to the east, along the Puerto Rico trench, and a dominantly strike–slip plate boundary to the west of the country (e.g., Bird 2003; Manaker et al. 2008). In the island of Hispaniola, the strike–slip motion between the Caribbean and North American plates is taken up by both the Septentrional fault to the north of the island in the Dominican Republic (DR) and the Enriquillo–Plantain Garden fault in Haiti, to the southwest. These two major strike–slip fault systems run roughly EW across Hispaniola and pose a significant earthqua
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