Work

Ground-motion dataset for shallow earthquakes in Colombia

Year: 2026

Type: article

Abstract: . The tectonics of Colombia is characterised by the interaction of multiple oceanic plates subducting beneath the continent, generating active transpressional deformation and a wide range of subduction-related and crustal earthquakes. We present a flatfile containing ground-motion intensity measurements from 694 shallow earthquakes. The dataset includes 8,086 three-component acceleration records that were uniformly processed. The computed IMs include peak ground velocity, peak ground acceleration, and 5 %-damped spectral accelerations for 31 periods ranging from 0.01 to 8 s. Furthermore, the Fourier Amplitude Spectra for each component is provided in the frequency range from 0.04 to 30 Hz. Epicentral and hypocentral distances are reported for all events, while finite-fault distance metrics are estimated for earthquakes with M > 5.5. Site conditions are characterised using VS30 and the horizontal-to-vertical spectral ratio (H/V). Hypocentre locations are constrained using the ISC-EHB catalogue and the Integrated Seismological Catalogue of the Colombian Geological Survey. For validation and consistency checks, the dataset was compared to a global and region-adapted Ground Motion Prediction Model. This flatfile constitutes a valuable resource for seismic hazard analysis, ground-motion modelling, risk assessment, earthquake engineering applications, seismic-site response and source physics characterization in Colombia, surrounding regions, and other comparable tectonic environments.

Source: Earth system science data

DOI: 10.5194/essd-18-7403-2026

Authors: Daniel Martinez-Jaramillo, Sreeram-Reddy Kotha, F. Ramón Zúñiga, Pierre Lacan