1. Department of Earth Sciences Utrecht University Utrecht The Netherlands
2. Now at Nestlé Amstelveen The Netherlands
3. Now at Royal HaskoningDHV Amersfoort The Netherlands
4. R&D Seismology and Acoustics Royal Netherlands Meteorological Institute De Bilt The Netherlands
5. Now at Department of Geological Sciences California State University Bakersfield CA USA
6. Faculty of Geo‐Information Science and Earth Observation University of Twente Enschede The Netherlands
7. Botswana Geoscience Institute Lobatse Botswana
8. Now at Comprehensive Nuclear‐Test‐Ban Treaty Organization (CTBTO) Vienna Austria