Geophysical evi-dence of the 1912 earthquake rupture along the central fault system of the Acambay Graben, Central Mexico

In this work, we have applied two geophysical techniques in different areas of potential interest for paleoseismological assessment the active faults Acambay graben. The main goal was to localize segments buried suspected break surface during 1912 Earthquake, order (1) identify favorable sites investigation purpose and (2) extrapolate data obtained with a paleoseismic trenching. On one hand, Electromagnetic Induction (EMI) Method used map horizontal variation apparent resistivity detect rupture Temascalcingo fault alluvial plain Lerma River. other within volcanic edifice, Electrical Resistivity Tomography (ERT) tech-nique characterize electrical distribution along profile or-der San Pedro fault, partially Holocene sedimentary filling small endorheic basin. Results these studies allow defining location orientation structures that potentially broke earthquake are hidden by recent deposits tectonic depressions. Good correla-tion between ERT subsurface deep imagery trench survey which cuts across trace, illustrate pertinence use such pale-oseismological volcano-sedimentary environments.