3 ms·
The scale is explained here: http://www.swpc.noaa.gov/noaa-scales-explanation http://www.swpc.noaa.gov/noaa-scales-explanation (click on "Geomagnetic storms")
by colanderman 9y ago
The scale is explained here: http://www.swpc.noaa.gov/noaa-scales-explanation http://www.swpc.noaa.gov/noaa-scales-explanation (click on "Geomagnetic storms")
- daenney 9y agoAh, lovely. Thanks for the pointer!