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Science 23 February 2001:
Vol. 291. no. 5508, pp. 1466 - 1467
DOI: 10.1126/science.291.5508.1466b
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News of the Week

ASTROPHYSICS:
Cluster Reveals Earth's Rippling Magnetic Field

Barbara Casassus and Alexander Hellemans

PARIS--Four satellites flying in unison have revealed a hidden wild side to Earth's magnetosphere, the magnetic field enveloping the planet that acts like a gigantic deflector shield against blasts of solar radiation. The unprecedented view, unveiled here last week at European Space Agency headquarters, could help scientists devise better defenses against crippling magnetic storms.

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