Linus Villiger published a paper in Geophysical Journal International on analysis of source mechanisms associated with hydraulic fracturing campaigns performed at Grimsel Test Site, Switzerland.
Reference:
Villiger, L., V. S. Gischig, G. Kwiatek, H. Krietsch, J. Doetsch, M. Jalali, F. Amann, D. Giardini, and S. Wiemer (2021). Meter-scale stress heterogeneities and stress redistribution drive complex fracture slip and fracture growth during a hydraulic stimulation experiment. Geophysical Journal International doi 10.1093/gji/ggab057