{"@context":"http://schema.org","@type":"Dataset","identifier":"https://doi.org/10.34691/FK2/91GHJE","name":"Copiapó_Experiment_Catalogue","author":[{"name":"Pastén, Francisco","affiliation":"Universidad de Chile"}],"datePublished":"2022-01-20","dateModified":"2022-01-27","version":"2","description":"The subduction of different features such as oceanic ridges, fractures zones or seamounts are important for the accurate characterization of subduction zones. These structures may affect the along-dip variability of seismic behavior and eventually trigger slow earthquakes. Here we studied the along- dip influence of the Copiapó ridge subduction in the Atacama region, North-Central Chile, an area where seismic swarms, low coupling values and slow earthquakes have been reported. We built a seismic catalog including repeating earthquakes and non-volcanic tremors (NVT), and performed a 3-D tomography for P-wave velocity and Vp/Vs ratio. We identify along-dip segmentation involving 4 distinct segments: (1) a locked seismogenic zone (20 to 35 km depth), hosting ordinary clustered micro-seismicity and repeating earthquakes; (2) a transition zone (35 to 42 km) with non-volcanic tremor and low seismicity; (3) a zone (42 to 60 km) without seismicity and with slow-slip events and (4) a deep zone with more abundant seismicity. The velocity models show differences among these zones: while low velocity anomalies of Vp and Vs, and Vp/Vs ratio between 1.76 and 1.82 are observed in the deep zone, higher velocities are present in the other areas. These features indicate that SSE are located in a zone with higher pore fluid pressure. We propose that these geodynamic differences are generated by the subduction of heterogenic seamounts associated to the Copiapó ridge.","keywords":["Ciencias de la Tierra y Medioambiente","Sismicidad "],"schemaVersion":"https://schema.org/version/3.3","license":{"@type":"Dataset","text":"CC0","url":"https://creativecommons.org/publicdomain/zero/1.0/"},"includedInDataCatalog":{"@type":"DataCatalog","name":"Repositorio de datos de investigación de la Universidad de Chile","url":"http://datos.uchile.cl"},"provider":{"@type":"Organization","name":"Dataverse"}}