Fig. 9

Seismicity around the Rhône-Simplon Line between Sion and Sierre in 2015/16. a Overview map with SED-routine hypocenter locations (blue circles: events in 2015; red circles: events in 2016), main tectonic units and three sets of mapped transtensive faults (after Cardello and Mancktelow 2015). See box in Fig. 2 for location of the overview map. b Map view of relative relocations of the St-Léonard sequence in the period 2014–2016 using double-difference techniques. Crosses indicate relative location errors of epicenters. c Map view of relative relocations of the Crans sequence derived from double-difference techniques. Colors in b and c indicate origin time of the events. All focal mechanisms are shown as lower hemisphere projections