Effects of Io ejecta on Europa

Aharon Eviatar*, George L. Siscoe, T. V. Johnson, D. L. Matson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


We examine the effects of Io ejecta on the surface and environment of Europa. We find that the observed sulfur on the trailing side of Europa, when interpreted as a deposit in equilibrium between implanation of, and sputtering by, corotating Io ejecta, implies a slow loss of material from Europa by sputtering. From this we infer that the spectrum of particles sputtered from water ice is soft. The quantity of observed sulfur and its confinement to the trailing hemisphere appear to exclude significant implantation and sputtering by energetic heavy ions. We also conclude that the contribution from Europa to the magnetospheric plasma (even at Europa itself) is negligible compared to the matter ejected from Io.

Original languageEnglish
Pages (from-to)75-83
Number of pages9
Issue number1
StatePublished - Jul 1981
Externally publishedYes


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