1. Chrono-environnement UMR6249, CNRS, University of Bourgogne Franche-Comté, F-25000, Besançon, France
2. Applied Seismology, NORSAR, Kjeller, Norway
3. Institute of Geosciences, University of Potsdam, Germany
4. Deschutes Signal Processing LLC, Maupin, Oregon, U.S.A.
5. Leibniz Institute for Applied Physics, Hannover, Germany
6. Department of Earth Science, University of Bergen, Bergen, Norway
7. Institute of Seismology, University of Helsinki, Helsinki, Finland