1. Department of Geology; Southern Illinois University; Carbondale IL USA
2. Department of Geosciences; University of Texas at Dallas; Richardson TX USA
3. School of Earth and Environmental Sciences; University of Manchester; Manchester UK
4. Sezione di Sismologia e Tettonofisica; Istituto Nazionale di Geofisica e Vulcanologia; Rome Italy
5. Department of Earth and Planetary Science, Graduate School of Science; The University of Tokyo; Tokyo Japan
6. School of Geosciences; University of the Witwatersrand; Johannesburg South Africa
7. Planetary and Space Science Centre; University of New Brunswick; Fredericton New Brunswick Canada
8. Centre of Earth Evolution and Dynamics; University of Oslo; Oslo Norway