As a comment on Seismic Electric Signals (SES) and earthquakes: A review of an updated VAN method and competing hypotheses for SES generation and earthquake triggering, herein we present the analysis of time series gathered by three MT stations located in the Eastern Cordillera of Colombia, for evaluating the electric and magnetic fields during an interval of several days. Records allow estimating multi-temporal apparent resistivity profiles in each station. Then, we correlate possible resistivity anomalies with seismicity, assuming that large earthquakes generated those anomalies. As an example, we identified a change in the apparent resistivity 7-h previous to the Mesetas earthquake (Mw6.0, December 24th, 2019). We would like to highlight that the resistivity anomaly was identified at the same depth as the earthquake hypocenter, and by more than one station.

作为对地震电信号（SES）和地震的评论：回顾了更新的VAN方法以及SES产生和地震触发的竞争假设，在这里，我们介绍了位于哥伦比亚东部山脉的三个MT站收集的时间序列分析，用于评估几天间隔内的电场和磁场。记录允许估算每个站中的多时间视电阻率曲线。然后，假设大地震产生了异常，将可能的电阻率异常与地震活动性联系起来。例如，我们确定了Mesetas地震（Mw6.0,2019年12月24日）之前7小时的视电阻率变化。我们要强调的是，电阻率异常是在与地震震源相同的深度处发现的，