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- Publications
- Influence
Tectonic Processes on Europa: Tidal Stresses, Mechanical Response, and Visible Features
- R. Greenberg, P. Geissler, +7 authors M. Carr
- Geology
- 1 September 1998
Abstract Europa's orbital eccentricity, driven by the resonance with Io and Ganymede, results in “diurnal” tides (3.5-day period) and possibly in nonsynchronous rotation. Both diurnal variation and… Expand
Shear heating as the origin of the plumes and heat flux on Enceladus
- F. Nimmo, J. Spencer, R. Pappalardo, M. Mullen
- Environmental Science, Medicine
- Nature
- 17 May 2007
Enceladus, a small icy satellite of Saturn, has active plumes jetting from localized fractures (‘tiger stripes’) within an area of high heat flux near the south pole. The plume characteristics and… Expand
Modeling stresses on satellites due to nonsynchronous rotation and orbital eccentricity using gravitational potential theory
- J. Wahr, Z. A. Selvans, +4 authors R. Pappalardo
- Physics
- 1 March 2009
Abstract The tidal stress at the surface of a satellite is derived from the gravitational potential of the satellite's parent planet, assuming that the satellite is fully differentiated into a… Expand
Diapir-induced reorientation of Saturn's moon Enceladus
- F. Nimmo, R. Pappalardo
- Geology, Medicine
- Nature
- 1 June 2006
Enceladus is a small icy satellite of Saturn. Its south polar region consists of young, tectonically deformed terrain and has an anomalously high heat flux. This heat flux is probably due to… Expand
Estimates of Europa's ice shell thickness from elastically-supported topography
- F. Nimmo, B. Giese, R. Pappalardo
- Geology
- 1 March 2003
[1] The thickness of Europa's solid ice shell is uncertain, and has important implications for Europa's habitability and thermal history, and the design of future spacecraft missions. Here we obtain… Expand
Does Europa have a subsurface ocean? Evaluation of the geological evidence
- R. Pappalardo, M. J. S. Belton, +31 authors K. Williams
- Geology
- 25 October 1999
It has been proposed that Jupiter's satellite Europa currently possesses a global subsurface ocean of liquid water. Galileo gravity data verify that the satellite is differentiated into an outer H2O… Expand
Geological evidence for solid-state convection in Europa's ice shell
- R. Pappalardo, J. Head, +8 authors D. Goldsby
- Environmental Science, Medicine
- Nature
- 22 January 1998
The ice-rich surface of the jovian satellite Europa is sparsely cratered, suggesting that this moon might be geologically active today. Moreover, models of the satellite's interior indicate that… Expand
Elastic Thickness and Heat Flux Estimates on Ganymede
- F. Nimmo, R. Pappalardo, B. Giese
- Geology
- 1 December 2001
We identify sites of apparent flexural uplift at rift zone boundaries on Ganymede using Galileo stere-derived topography. The estimated effective elastic thichness Te is 0.2-0.6 km for a nominal… Expand
Europa: Morphological characteristics of ridges and triple bands from Galileo data (E4 and E6) and assessment of a linear diapirism model
- J. Head, R. Pappalardo, R. J. Sullivan
- Geology
- 25 October 1999
Galileo solid-state imaging (SSI) images of Europa provide high-resolution data on the morphological characteristics of ridges and permit the development of nomenclatural schemes for their… Expand