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NOAA Photo Library Image - cgs02140

Geomagnetic observatories that were putting hourly values in machine-readable form prior to the International Geophysical Year.

Image ID: cgs02140, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Photo Date: 1969


Category: Coast and Geodetic Survey/Geophysics Geomagnetism/

• High Resolution Photo Available




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Last Updated: April 30, 2013