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Science 28 September 2001:
Vol. 293. no. 5539, p. 2370
DOI: 10.1126/science.293.5539.2370a
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News of the Week

MAGNETOSPHERIC PHYSICS:
Magnetic Storms Have Two Drivers, Not One

Richard A. Kerr

Space physicists have long known that the gale of charged particles howling by Earth at supersonic speeds bears the ultimate responsibility for magnetic storms, but they have vacillated between two very different explanations of how the solar wind roils Earth's magnetosphere. Now, a study using the latest in magnetospheric probes--published in the 1 September issue of Geophysical Research Letters--may settle the sometimes contentious issue: Both explanations appear to be right.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)