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Results 1 - 2 from 2 for plage regions in 0.055 sec.
NGDC/STP - CD-ROMs from Solar-Terrestrial Physics
Regions of Solar Activity: A "write-once" CD-ROM written in standard ASCII text files containing records of Ca plage regions and sunspot groups. Records are grouped by year and by station. Plage observations ...
www.ngdc.noaa.gov
NGDC/WDC STP, Boulder-Historical Solar Observations Available on 35 mm Microfilm
NGDC > stp > solar comments | privacy policy HISTORICAL SOLAR OBSERVATIONS ON 35MM MICROFILM McMath-Hulbert Calcium Plage Regions - Full disk daily drawings and summary tables. Calcium drawings from Mt Wilson and Big ... by the International Astronomical Union. The early editions contained tables of sunspot activity and plage regions observed in calcium and H-alpha light. By the mid-1930's the ...
www.ngdc.noaa.gov
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