1. European-Mediterranean Seismological Centre, c/o CEA, 91297 Arpajon, Cedex, France.
2. CEA, DAM, DIF, F-91297 Arpajon, France.
3. Kövesligethy Radó Seismological Observatory, Geodetic and Geophysical Institute, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences (MTA CSFK GGI KRSZO), Budapest, Hungary.
4. GFZ German Research Centre for Geoscience, Potsdam, Germany.