Benioff Horizontal Seismometer (WWSSN)

This variable reluctance, short-period horizontal seismometer is based on the design of Hugo Benioff, a scientist on the staff of the Seismological Laboratory at the California Institute of Technology in Pasadena. It was made by the Geotechnical Corporation in Dallas, Texas, in the early 1960s, for use in VELA-Uniform, a government-sponsored project designed to detect and map earthquakes and underground nuclear explosions. One part of VELA-Uniform was a World Wide Standardized Seismograph Network.
This example is marked "Model No. 1101 / Serial No. 4201." It was used at the WWSSN station at Junction City, Texas.
date made
Geotechnical Corporation
place made
United States: Texas, Dallas
overall: 53 cm x 50.4 cm x 53.5 cm; 20 7/8 in x 19 27/32 in x 21 1/16 in
ID Number
catalog number
accession number
Credit Line
U.S. Geological Survey
related event
Cold War
See more items in
Medicine and Science: Physical Sciences
Measuring & Mapping
Science & Mathematics
Data Source
National Museum of American History, Kenneth E. Behring Center


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