National Geophysical Data Center 
National Environmental Satellite, Data, 
and Information Service 
National Oceanic and Atmospheric 
Administration 
325 Broadway 
Boulder, CO 80303 
(303) 497-6215, FTS 320-6215 
Kind of Data 
Seismic Data and Activities 
Location and Dates: Information for the 50 states is available. 
Period of coverage varies greatly from site to 
site, but sometimes pre-1850 data can be found. 
Description of Data: The services provided include preparing local and 
regional seismic histories for engineers, actuaries, and other scientists and 
answering direct inquiries from the public on all aspects of historical earth- 
quakes. Additional services and products include publishing annual earthquake 
reports, and making available copies of seismograms, accelograms, displacement 
meter records, digitized strong-motioned seismograms, and epicenter lists in 
several formats. Many of these products and services are based on seismic 
records or other data that have originated with US Geological Survey (USGS) 
recording networks or with USGS data-reduction facilities. 
Qualified Users: No limitations 
Point of Contact: National Geophysical Data Center 
National Environmental Satellite, Data, 
and Information Service 
National Oceanic and Atmospheric 
Administration 
325 Broadway 
Boulder, CO 80303 
(303) 497-6215, FTS 320-6215 
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