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pl23_cgs02139.jpg

Geomagnetic observatories that were currently putting hourly values in machine-readable form as of 1969

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https://www.noaa.gov/media/digital-library-photo/pl23cgs02139jpg

Description

Geomagnetic observatories that were currently putting hourly values in machine-readable form as of 1969.

Display Date

1969

Collection

Historic Coast & Geodetic Survey

Keywords

Coast and Geodetic Survey

Geophysics Geomagnetism