SAMPEX Observations of Radiation Belts,
The Solar Anomalous Magnetospheric Particle Explorer obtained this
of images in May 1998, during a period of intense activity in
radiation belts. SAMPEX measures the intensity of the radiation
in electron volts (with the most intense areas being bright red)
where the belts connect to Earth's upper atmosphere.
CREDIT: Shri Kanekal/NASA Goddard Space Flight Center