USGS National Earthquake Information Center
https://earthquake.usgs.gov/contactus/golden/neic.php
Contact
Mailing Address
U.S. Geological Survey
National Earthquake Information Center
National Earthquake Information Center
Box 25046, MS 967
Denver, CO 80225Telephone
Earthquake Information: +1-303-273-8500
Fax: +1-303-273-8450