1. ORFEUS & Swiss Seismological Service at ETH Zürich, Zürich, Switzerland
2. Instituto Dom Luiz, Faculdade de Ciências, Universidade de Lisboa, Portugal, Lisbon, Portugal
3. Institute of Geodynamics, National Observatory of Athens, Athens, Greece
4. Istituto Nazionale di Geofisica e Vulcanologia, Milan, Italy
5. Department of Earth Science, University of Bergen, Bergen, Norway
6. Institut des Sciences de la Terre, Université Grenoble Alpes, Grenoble, France
7. ORFEUS & Royal Netherlands Meteorological Institute, De Bilt, The Netherlands