1. Department of Earth and Planetary Sciences; University of California; Santa Cruz; California; USA
2. Department of Geosciences; Pennsylvania State University; University Park; Pennsylvania; USA
3. Seismological Laboratory; California Institute of Technology; Pasadena; California; USA
4. Department of Earth and Atmospheric Sciences; Saint Louis University; Saint Louis; Missouri; USA
5. Data Management Center; Incorporated Research Institutions for Seismology; Seattle; Washington; USA