Clouse to faults or unstable areas where an earthquake could happen with capacity of affecting
buildings or infrastructure, there is often a previous energy that wanders around surroundings,
this energy regularly is associated to electromagnetic emissions that generate an electric
potential frequently studied as very, ultra-low and extreme frequency emissions (VLF-ULFELF_
EM) by remote sensing; under the assumption that this natural potential exist, in aquatic
environment within the micro-seismic active area in the coastal border of Guerrero and Oaxaca
estates, Mexico, an intensive conductivity monitoring in two artesian well was carried out. The
results of intensive conductivity (μS/cm) monitoring done since March to July of 2015, using a
low-cost Data logger sensor are presented. The results obtained of the study of 235 seismic
events show that 61.64% of them manifest prior conductivity oscillation versus 38.36% of early
conductivity oscillation; a discussion of the origin of such oscillation and the possible relation
with to recharge flux, ground light compression, ground tilt, local electromagnetic energy
emissions, human interaction, was debated. The data analysis for long periods of conductivity
monitoring and seismic events show that when the number of seismic events became intense,
conductivity decreases and vice versa, resulting large fluctuations that grew over time lake
waves, within the studied area appears to be there is a possible previous long term energy
oscillation associated to the process of earthquakes manifestation around.