The binary data are available via anonymous FTP from the National Strong Ground Motion FTP-server:
ftp://smftp.wr.usgs.gov in directory GEOS/WNE.
For further information on these recordings refer to USGS Open-File Report 88-688: Digital Recordings of Aftershocks of the 1 October 1987 Whittier Narrows, California, Earthquake; by C. Mueller, C. Dietel, G. Glassmoyer, T. Noce, E. Sembera, P. Spudich, and J. Watson.
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/WNE/whittier.html
e-mail: glassmoyer@usgs.gov
or address:
Gary Glassmoyer
345 Middlefield Road M/S 977
Menlo Park, California 94025