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SatStressGUI output of Europa’s stress The top image shows the SatStressGUI output when only obliquity and diurnal stresses are considered on Europa. This shows how cycloids (black lines) form. The wavy features seen in the bottom image are created when NSR stresses are added to obliquity and diurnal stresses. <a href="http://www.hou.usra.edu/meetings/lpsc2016/pdf/2712.pdf">From Pappalardo et al. (2016)</a>