1. Rice University EEPS Houston TX USA
2. University of Texas Institute for Geophysics Austin TX USA
3. Los Alamos National Laboratory Geophysics Group Los Alamos NM USA
4. Department of Physics University of Nevada Reno NV USA
5. Department of Geosciences Pennsylvania State University State College PA USA
6. Dipartimento Scienze della Terra Sapienza Universitá di Roma Rome Italy
7. Rice University CAAM Houston TX USA