LINK: wattsupwiththat.com
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What does the graph mean?
It’s relative value of geo-magnetic activity vs. time. It comes from the National Oceanic and Atmospheric Administration Satellite and Information Service: http://www.ngdc.noaa.gov/stp/GEOMAG/kp_ap.html
Δ
What does the graph mean?
It’s relative value of geo-magnetic activity vs. time. It comes from the National Oceanic and Atmospheric Administration Satellite and Information Service: http://www.ngdc.noaa.gov/stp/GEOMAG/kp_ap.html