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U.S. Geological Survey Crustal Studies Technical Letter Number 3

In cooperation with the Defense Advanced Research Projects Agency

Times and Locations of Explosions; U.S. Geological Survey 1962 Field Season

By John C. Roller


Thumbnail of and link to report PDF (17.6 MB)Summary

The U.S. Geological Survey detonated 86 large charges of chemical explosives in the western United States from 6 June to 9 August 1962, in a study of crustal structure in the western United States.

This Technical Letter consists of two tables containing information about these explosions. Table I gives a brief geographical description of the shotpoints, and Table II gives the date, time, location, charge size, surface elevation, and some general information about the shots. In the Remarks column (Table II), the configuration and depth of most of the charges are given. This part of the table is not complete, as some of this information has not yet been compiled.

Three types of explosives were used in the program. These were: Nitramon WW, a carbo-nitrate blasting agent; Composition B, a mixture of RDX and TNT; and Tovex-Gel, a non-nitroglycerin blasting slurry.

The loading, firing, and surveying was done by United ElectroDynamics, Inc., of Pasadena, California. The timing was done by the U.S. Geological Survey.

  • This report is available only on the Web.

For additional information:
Contact Information, Earthquake Science Center, Menlo Park Science Center
U.S. Geological Survey
345 Middlefield Road, MS 977
Menlo Park, California 94025

This report is presented in Portable Document Format (PDF); the latest version of Adobe Reader or similar software is required to view it. Download the latest version of Adobe Reader, free of charge.

Suggested citation:

Roller, J.C., 1962, Times and locations of explosions; U.S. Geological Survey 1962 field season: U.S. Geological Survey Crustal Studies Technical Letter Number 3, 10 p. (Available at



Table I. Brief Geographical Description of Shotpoints

Table II. Times and Locations of Explosions

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