Earth  Sun  ID: 4006

The Radiation Belts as seen by SAMPEX

This is a simulation of the Earth's radiation belts constructed from SAMPEX data around the time of the 2003 Halloween solar storms. In this visualization, we present the belts in cross-section to provide a better view of their interior structure.

The Earth's magnetosphere is a very large magnetic structure around the Earth, and gets stretched into a large, teardrop-shaped configuration through its interaction with the solar wind. A number of the magnetic field lines, while they may originate on the Earth, do not connect back to the Earth, but connect into the magnetic field carried by the solar wind. However, near the Earth, the magnetic dipole component of the field is stronger than the solar wind field, and this allows all the magnetic field lines to connect back to the Earth, forming (approximately) the classic magnetic dipole configuration (Wikipedia). In this region, lower energy electrons and ions, many from the Earth's ionosphere, can become trapped by the magnetic field to form the radiation belts.

The radiation belt model is constructed from particle flux information from the SAMPEX mission, with the flux mapped to constant L-shells of the Earth's dipole magnetic field (Wikipedia). The model is anchored to the Earth's geomagnetic field axis, which is not perfectly aligned with the Earth's rotation axis. This creates a small wobble of the radiation belts with time, which can be seen in this visualization.

The data driving the radiation belt structure is from the 2003 Halloween solar storms, a series of strong solar eruptions that began in late October 2003 and continued into the first week of November. During this time, the particle content of the belts change rapidly due to the variation in the energetic particle flux from the Sun buffeting the Earth's magnetosphere.

This dataset was also used to generate radiation belts for the RBSP prelaunch visualizations.



Visualization Credits

Tom Bridgman (Global Science and Technology, Inc.): Lead Animator
Shrikanth G. Kanekal (NASA/GSFC): Scientist
Karen Fox (ADNET Systems, Inc.): Writer
Please give credit for this item to:
NASA/Goddard Space Flight Center Scientific Visualization Studio

Short URL to share this page:

Solar Anomalous and Magnetospherice Particle Explorer (SAMPEX)

Data Used:
Solar Anomalous and Magnetospheric Particle Explorer (SAMPEX)/HILT
2003/10/17 - 2003/12/25
Note: While we identify the data sets used in these visualizations, we do not store any further details nor the data sets themselves on our site.

This item is part of this series:
Halloween 2003 Solar Storms Revisited

SVS >> Geomagnetic Field
SVS >> Magnetic Fields
SVS >> Magnetosphere
SVS >> Solar Wind
GCMD >> Earth Science >> Sun-earth Interactions
SVS >> Radiation Belts
SVS >> Space Weather
SVS >> Hyperwall
SVS >> Heliophysics
NASA Science >> Earth
NASA Science >> Sun
GCMD >> Earth Science >> Sun-earth Interactions >> Solar Activity >> Coronal Mass Ejections

GCMD keywords can be found on the Internet with the following citation: Olsen, L.M., G. Major, K. Shein, J. Scialdone, S. Ritz, T. Stevens, M. Morahan, A. Aleman, R. Vogel, S. Leicester, H. Weir, M. Meaux, S. Grebas, C.Solomon, M. Holland, T. Northcutt, R. A. Restrepo, R. Bilodeau, 2013. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version