Cycloidal cracks on Europa: Improved modeling and non-synchronous rotation implications

T. A. Hurford, A. R. Sarid, Richard J. Greenberg

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Cycloidal crack patterns on Europa are influenced by tides induced by orbital eccentricity, which in turn is driven by the Laplace orbital resonance. Their shapes potentially record the location of their formation (relative to the direction of Jupiter), as well as the parameters of crack formation. Hoppa et al. [Hoppa, G., Tufts, B.R., Greenberg, R., Geissler, P., 1999a. Icarus 141, 287-298] modeled several cycloid chains using a fixed set of material parameters, but some details did not fit. We now allow material parameters to vary for each arc of an observed cycloid. In general, with minimal variation of model parameters between the arcs, fits are greatly improved. Furthermore, accounting for tidal stress accumulated during non-synchronous rotation, in addition to diurnal stress, allows even better fits. Even with the added freedom in the model our fits allow us to better constrain the location where each cycloid may have formed. Our results support Hoppa et al.'s finding that only a few cracks form ridges per cycle of non-synchronous rotation in the region examined, probably because cracking relieves built up stress until further substantial rotation occurs.

Original languageEnglish (US)
Pages (from-to)218-233
Number of pages16
JournalIcarus
Volume186
Issue number1
DOIs
StatePublished - Jan 2007

Fingerprint

Europa
cycloids
crack
cracks
modeling
arcs
crack initiation
tides
Jupiter (planet)
eccentricity
Jupiter
ridges
tide
orbitals
cycles
parameter
material

Keywords

  • Europa
  • Tectonics

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Cycloidal cracks on Europa : Improved modeling and non-synchronous rotation implications. / Hurford, T. A.; Sarid, A. R.; Greenberg, Richard J.

In: Icarus, Vol. 186, No. 1, 01.2007, p. 218-233.

Research output: Contribution to journalArticle

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