Chile Strong Ground Motion Flatfile

The Nazca-South American plate boundary produces large-magnitude events (M-w > 8) every 20 years on the coast of Chile. This work describes a public ground motion database that contains 3,572 records from 477 earthquakes and 181 seismic stations, which includes the recent 2015 M-w 8.3 Illapel earthquake. The data set is controlled by subduction interface and inslab events. The oldest event included is Valparaiso (1985), and the magnitude span is 4.6-8.8 M-w. The source-to-site distance metrics reported are the closest distance to the rupture plane (R-rup), epicentral (R-epi) and hypocentral (R-hyp) distances, with a range for R-rup from 20 to 650 km. Site characterization is based on V-S30, ranging from 110 to 1,951 m/s. Intensity measures included are peak ground acceleration, spectral acceleration values from 0.01 to 10 s, Arias intensity, and peak ground velocity. Each record was uniformly processed component by component. A flatfile with the related metadata and the spectral accelerations from processed ground motions is available at NEEShub (http://doi.org/10.17603/DS2N30J; Bastias and Montalva 2015).