Detection of possible fault in steep hill of Ecoparque El Espino, La Libertad

Abstract

In order to investigate a possible fault in “Ecoparque el Espino”, a region inside the San Salvador volcano complex, a electrical resistivity tomography was performed using a single survey line of electrodes in a Wenner array. A software inversor was used to produce a two-dimensional cross sections of resistivity values across the survey line, via a least-squares optimization method, with the respective topography corrections. The results show a distortion of equipotential lines in a linear matter in the first 20 meters of the profile, which indicates that a fault with an apparent dip angle around 80° is most likely present.