pl23_cgs02112.jpg
![Appears to be map of sunspot activity cgs02112.jpg Appears to be map of sunspot activity](https://s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_cgs02112.jpg)
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https://www.noaa.gov/media/digital-library-photo/pl23cgs02112jpgDescription
Appears to be map of sunspot activity. Perhaps related to geomagnetic work.
Display Date
1966 September 22
Collection
Historic Coast & Geodetic Survey
Keywords
Coast and Geodetic Survey
Geophysics Seismology