Electron Flux Variation

>2 MeV electron flux variation in 1998-2015 (GOES10/GOES11/GOES15) 135°W

This plot shows a long-term (1998 - 2015) variation of >2MeV electron flux observed by GOES series at a geostationary orbit. Hourly averaged, yearly averaged, and yearly maximum fluxes are shown as thin-, heavy-, and dotted-lines, respectively.

Solar wind speed and relative sunspot number (SSN) variations

This graph shows variations of solar wind speed and relative sunspot number during 1998-2015. Solar activities (associated with solar wind speed) influence electron flux variations in the radiation belts.