Plasma Physics P-24, Los Alamos National Laboratory, MS E526, Los Alamos, NM 87545 United States; Seismological Laboratory, California Institute of Technology, MC 252-21, Pasadena, CA 91125
Seismological Laboratory, California Institute of Technology, MC 252-21, Pasadena, CA 91125
Seismological Laboratory, California Institute of Technology, MC 252-21, Pasadena, CA 91125
Division of Geological & Planetary Sciences, California Institute of Technology, 170-25, Pasadena, CA 91125 United States