Geoelectric Anomalies Preceding the Aug. 24 2016 Amatrice, Italy Earthquake

We report on geoelectric measurements taken at 70 and 120 km from the epicenter of the M6.2 Amatrice Central Italy Earthquake Aug. 24, 2016. Two stations, each consisting of 12 buried electrodes at depths of 1 to 3 meters, recorded ground EMF values once per second for approximately one year prior to the earthquake. Several geoelectric anomalies suggest the incidence of seismic electric signals in the weeks leading up to the earthquake. Notably, EMF values in the DC regime deviated progressively farther from baseline levels and AC components exhibited episodes of significant nonstationarity in their frequency spectra as the earthquake approached.