Seismic-electromagnetic signals from two monitoring stations in Southern Italy: Electromagnetic time series release

The seismic-electromagnetic phenomenon entails the generation of transient electromagnetic signals, which can be observed both simultaneously (co-seismic) and preceding (pre-seismic) a seismic wave arrival. Following the most accredited hypothesis, these signals are mainly due to electrokinetic effects, generated on microscopic scale in porous media containing electrolytic fluids. Thus, the seismic-electromagnetic signals are expected to be suitable for the detection and tracking of crustal fluids. Despite the growing interest in this phenomenon, there is a lack of freely available observational database of earthquake-related electromagnetic signals recorded at co-located seismic and magnetotelluric stations. To fill this gap, we set up two multicomponent monitoring stations in two seismically active areas of Southern Italy: the Gargano Promontory and the High Agri Valley. This work is both aimed to systematically analyse earthquake-generated seismic-electromagnetic recordings and to make the collected database accessible to the scientific community.