For information on these recordings refer to USGS Open-File Report 87-326: GEOS Data Summary for Active and Passive Seismic Experiments Conducted in Support of Northern Nevada Lithospheric Experiments - Passcal; combiled and edited by Christopher Dietel and Roger D. Borcherdt; 269 pages.
The GEOS Home Page is at http://nsmp.wr.usgs.gov/GEOS/geos.html
The URL of this page is http://nsmp.wr.usgs.gov/GEOS/PASSCAL/passcal.html
e-mail: glassmoyer@usgs.gov
or address:
Gary Glassmoyer
345 Middlefield Road M/S 977
Menlo Park, California 94025