Fig. 12

Focal mechanism and relative relocation of the Fribourg/Tafers sequence of 2018/19 and its possible relation to the Fribourg Fault zone. a SED bulletin locations in the region of the Fribourg Fault (red in 2018, blue in 2017 and grey for before this period). Grey focal mechanisms correspond to previous significant events in the region. The blue mechanism corresponds to the St. Silvester normal-fault earthquake of 2017 (see Fig. 6b) and the red mechanism shows the Fribourg/Tafers event of 2018 (see Fig. 7p). b Relative relocations of the Fribourg/Tafers sequence of 2018 (reaching into 2019) presented in map view and projected onto depth profile AA′, which is oriented perpendicular to NW–SE striking plane of the first-motion focal mechanism. Focal mechanisms are shown as lower hemisphere projection in map view and projected to the depth profile in cross-section. Colours indicate origin time of the events. Bars in b indicate relative location errors of hypocentres