Potential geothermal structure inferred from the electrical resistivity and seismic reflection models in the western Ilan Plain, NE Taiwan

•The electrical resistivity model shows that the high conductivity anomaly distributes in the depths of 500-1100 m south of the drilled geothermal observation wells.•The 3D electrical resistivity model is highly correlated with the normal fault model.•The anomalous high conductor could be correlated the reservoir and controlled by theChuoshui Fault and the Chukeng Fault.•The meteoric water may propagate down through the high-permeability fault system that creates the geothermal system.