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Science 2 December 1988:
Vol. 242. no. 4883, pp. 1280 - 1283
DOI: 10.1126/science.242.4883.1280
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Articles

Io: Evidence for Silicate Volcanism in 1986

TORRENCE V. JOHNSON 1, GLENN J. VEEDER 1, DENNIS L. MATSON 1, ROBERT H. BROWN 1, ROBERT M. NELSON 1, and DAVID MORRISON 2

1 Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109.
2 Institute for Astronomy, University of Hawaii at Manoa, Honolulu, HI 96822.

Infrared observations of Io during the 1986 apparition of Jupiter indicate that a large eruptive event occurred on the leading side of Io on 7 August 1986, Universal Time. Measurements made at 4.8, 8.7, and 20 micrometers suggest that the source of the event was about 15 kilometers in radius with a model temperature of sim900 Kelvin. Together with previously reported events, these measurements indicate that high-temperature volcanic activity on the leading side of Io may be more frequent than previously thought. The inferred temperature is significantly above the boiling point of sulfur in a vacuum(715 Kelvin) and thus constitutes strong evidence for active silicate volcanism on the surface of Io.

Submitted on October 4, 1988
Accepted on October 7, 1988


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
High-Temperature Silicate Volcanism on Jupiter's Moon Io.
A. S. McEwen, L. Keszthelyi, J. R. Spencer, G. Schubert, D. L. Matson, R. Lopes-Gautier, K. P. Klaasen, T. V. Johnson, J. W. Head, P. Geissler, et al. (1998)
Science 281, 87-90
   Abstract »    Full Text »
Hydrogen Sulfide on IO: Evidence from Telescopic and Laboratory Infrared Spectra.
D. B. Nash, D. B. NASH, and R. R. HOWELL (1989)
Science 244, 454-457
   Abstract »    PDF »


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