1. Research School of Earth Sciences Australian National University Canberra ACT Australia
2. Department of Earth Sciences University of Cambridge Cambridge UK
3. Department of Earth Science and Engineering Imperial College London, South Kensington Campus London UK
4. Department of Geology Kent State University Kent OH USA
5. Instituto Geológico y Minero de España Unidad de Zaragoza Zaragoza Spain
6. Institute of Earth Sciences Jaume Almera Consejo Superior de Investigaciones Científicas Barcelona Spain
7. Istituto Nazionale di Geofisica e Vulcanologia Rome Italy