1. Seismological Laboratory 252-21, California Institute of Technology, Pasadena, CA 91125
2. U.S. Geological Survey, Pasadena, CA 91106
3. Lindvall Richter Benuska Associates, Los Angeles, CA 90041
4. Department of Geological Sciences, California State University, San Bernardino, CA 92407
5. Central Washington State University, Ellensburg, WA 98926
6. California Division of Mines and Geology, Los Angeles, CA 90012