1. Lawrence Livermore National Laboratory, P.O. Box 808 L502, Livermore, CA 92550
2. Department of Geophysics and Planetary Sciences, Tel‐Aviv University, Tel‐Aviv 69978, Israel; and The Seismic Acoustics Laboratory, University of Houston, Houston, TX 77004
3. Department of Physical Chemistry and the Fritz Haber Research Center for Molecular Dynamics, The Hebrew University, Jerusalem 91904, Israel