Forbush Decrease

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Forbush Decrease </dt>
The observed decrease in cosmic ray activity in the earth's atmosphere about a day after a solar flare. </dd>
''The Forbush decrease is believed to be caused by a shielding effect of the magnetic fields contained in the plasma cloud emitted from the sun at the time of the flare. [[/a>|/a>]] </dd>

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use