We used up to 80 electrodes with varying electrode spacing for Wenner, Schlumberger, and Dipole-Dipole arrays, depending on target resolution and depth. Electric resistivity tomography (ERT) was performed with a 4-point-light system (Lippmann Geophysikalische Messgeräte).

The topographic data were extracted from the 1 m DEM. Processing included frequency bandpass filtering, background removal, gain adjustments, and topographic corrections. All data were processed with the ReflexW software (Sandmeier Geophysical Research). We used a ground-penetrating radar (GPR) system from Geophysical Survey Systems Inc (GSSI) with monostatic 100 MHz, 270 MHz, and 400 MHz antennas and a Pulse EKKO Pro Sensors & Software system equipped with bistatic 250 MHz antennas. We performed geophysical surveys across the potentially active faults in Slovenia and Italy to select sites for paleoseismic trenching. A prerequisite for paleoseismological trenching is knowledge on the precise location of the fault trace and the availability of a suitable sediment record. the excavation of active faults to study their earthquake history and slip behaviour. One way to overcome these problems is the use of paleoseismology, i.e. Geomorphological studies are confronted with problems arising from the low fault slip rates, distributed deformation, and unfavourable conditions due to the karst environment. Due to the low deformation rates, geodetic techniques and seismology provide only limited insights into the activity of those faults. Here, a system of mainly NW-SE trending, right-lateral strike-slip faults accommodates the shortening between the Adriatic Plate and Eurasia.

AbstractThe transition zone between the Southern Eastern Alps and the Dinarides is situated in western Slovenia and northeastern Italy.

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