P. Pedraza García1
1Servicio Geologico Colombiano (SGC), Bogota, Colombia
Abstract:
The National Seismological Network of Colombia, operated by the Colombian Geological Survey, receive in real time seismic data from 48 broad band stations and 47 strong motion stations installed along the Colombian territory, and data from stations of neighbouring countries. This high density of the data allows the retrieval of source parameters for moderate earthquakes. Moment tensor solutions from earthquakes with Mw>4.0 recorded between 2012 and 2017 in Colombia and offshore areas were obtained. Moment tensor inversions were calculated with the inversion of complete regional waveforms in the range of 0.01–0.1Hz using the ISOLA code. The epicentres, depths and magnitudes estimated by national network were used as input, and centroid position and depth were refined by spatial and temporal grid-searching around the starting parameters; the quality of the solutions was assessed taking advantage of the ISOLA tools. This new catalogue, with its considerable increase in the total number of available solutions, has great potential to improve our understanding of the regional seismicity and of the ongoing tectonics.
