EGU22-10854
https://doi.org/10.5194/egusphere-egu22-10854
EGU General Assembly 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Temporal variation estimates of apparent resistivities associated with occurrence of seismic activity around Bogotá - Colombia using MT records from the RSUNAL seismic network

Juan Sebastián Gómez Camacho, Juan José Gómez Rodriguez, and Carlos Alberto Vargas Jiménez
Juan Sebastián Gómez Camacho et al.
  • Universidad Nacional de Colombia, Geoscience Department, Bogotá, Colombia (juasgomezcam@unal.edu.co)

This work allowed us to estimate the space-time variations of the apparent resistivity (AR) at the USME station of the Red Sismológica de la Universidad Nacional de Colombia (RSUNAL), located in the center of Colombia at the Eastern Cordillera, and correlate these changes with seismic activity within a radius of 500 km to the station.

This project used recorded time series of the natural earth’s electric and magnetic field, processed its data with a computational algorithm of our own (which follows the magnetotelluric (MT) method’s fundamentals), and yielded positive results for the 6.1 Mw earthquake of December 24th, 2019 in Mesetas (Meta - Colombia) with some anomalies registered 8 hours before the mainshock. Although there is just one abnormal behavior for 1 of 5 study cases, it is seen in a good way a possible relation between the magnitude of the event and the AR anomaly as an input to the study of seismic precursors.

How to cite: Gómez Camacho, J. S., Gómez Rodriguez, J. J., and Vargas Jiménez, C. A.: Temporal variation estimates of apparent resistivities associated with occurrence of seismic activity around Bogotá - Colombia using MT records from the RSUNAL seismic network, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-10854, https://doi.org/10.5194/egusphere-egu22-10854, 2022.

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