Category:World-Wide Standardized Seismograph Network

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Media in category "World-Wide Standardized Seismograph Network"

The following 2 files are in this category, out of 2 total.

Seismometer (horizontal), made for the World Wide Standard Seismological Network by Spregnether Instrument Company, St. Louis, MO, 1961-1962 - National Museum of American History - DSC00020.jpg 3,541 × 4,625; 7.1 MB
Seismometer (vertical), made for the World Wide Standard Seismological Network by Spregnether Instrument Company, St. Louis, MO, 1961-1962 - National Museum of American History - DSC00023.jpg 4,148 × 3,413; 5.66 MB

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