Fig. 6

Focal mechanisms and synthetic focal mechanisms for the microseismic events in the basement: a, b The focal mechanisms based on earthquakes analysed in Deichmann (1990), Baer et al. (2001), and Deichmann (2015). c, d Synthetic focal mechanisms produced based on the orientation of interpreted faults by Ustaszewski and Schmid (2007) by applying the regional stress orientation (Fig. 5). The synthetic focal mechanisms have two nodal planes in which the bold great circle indicates the fault plane