Fig. 1

a Location of the study area within Switzerland. The inner inset corresponds to the tectonic map in (b). b Tectonic map with the main units, fault systems, seismicity and seismic stations in the northern part of the Jura FTB. Faults and fold systems are from swisstopo database (Swisstopo, 2005). Circles indicate earthquakes as listed in the bulletin of the Swiss Seismological Service (SED) between 1984 and 2021 with colors indicating focal depths (see legend). Green squares indicate identified quarry blasts. c Zoom in of the area of investigation with the location of the Mont Terri tunnel (dashed line) and the quarries (yellow polygons) indicated