1. Department of Earth and Environment Boston University Boston MA USA
2. Jackson School of Geosciences University of Texas at Austin Austin TX USA
3. Scripps Institution of Oceanography, University of California San Diego La Jolla CA USA
4. School of Geosciences The University of Oklahoma Norman OK USA
5. USGS, Earthquake Science Center Moffett Field CA USA
6. Center for Earthquake Research and Information, University of Memphis Memphis TN USA
7. Department of Geosciences The University of Tulsa Tulsa OK USA