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GEM Storm Intervals |
Other Storm Intervals |
Each plot shows the first 4 relativistic electron channels from the ESP energetic particle instrument. One plot is provided for each satellite that was taking data during the 10-day interval shown. Electron flux is plotted in units of particles/(cm^2-s-sr-keV). Geosynchronous orbit lies in the outer portion of the radiation belts. Typically there is a decrease (dropout) of MeV electrons during the main phase of a magnetic storm followed by a recovery or an enhancement of MeV electron fluxes during the storm recovery phase. In addition there is a diurnal variation (caused by the asymmetry of the Earth's magnetic field) that makes the fluxes peak when the satellite is at noon.
Substorm activity is apparent in these energy channels. Both dispersionless and energy-dispersed injections can be seen. The apparent intensity of an injection is a function of the spacecraft position in local time. A single energy channel (1.8-3.5 MeV) from all satellites is plotted in the LANL Overview Plots.
Geoff Reeves
Los Alamos National Laboratory
505-665-3877, phone
505-665-4414, fax
reeves@lanl.gov
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