Scientists investigated the electrical resistivity of the ground in Mogod valley, Mongolia using a method called Magnetotelluric inversion. They measured magnetic and electric fields at 20 sites to study faults and geothermal activity. By analyzing the data, they found anomalies in resistivity at shallow depths and estimated the thickness of the upper crust to be around 11-17 km. They also discovered an electric conductor in the southwest of the region, suggesting it could be linked to geological activity and underground fluids.