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Science 10 October 1997:
Vol. 278. no. 5336, pp. 268 - 271
DOI: 10.1126/science.278.5336.268
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Reports

The Response of Jupiter's Magnetosphere to an Outburst on Io

Michael E. Brown, * Antonin H. Bouchez

A 6-month-long monitoring campaign of the Io plasma torus and neutral cloud was conducted to determine the characteristics of their interaction. During the observations, a large outburst of material from Io--inferred to be caused by the eruption of a volcanic plume on Io--caused a transient increase in the neutral cloud and plasma torus masses. The response of the plasma torus to this outburst shows that the interaction between Io and Jupiter's magnetosphere is stabilized by a feedback mechanism in which increases in the plasma torus mass cause a nonlinear increase in loss from the plasma torus, limiting plasma buildup.

Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California 91125, USA.
*   To whom correspondence should be addressed. E-mail: mbrown{at}gps.caltech.edu

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