The tilt can help scientists how much heat is generated by tides, and even how long the ocean was liquid. Europa's network of crisscrossing cracks serves as a record of the stresses caused by huge tides in the moon's global ocean. These tides happen because Europa travels around Jupiter in a oval orbit. When Europa comes closer to the planet, the moon gets stretched like a rubber band, The moon's ice layer has to stretch and flex to accommodate these changes, but when the stresses become too big, it cracks. The weird part is why the cracks point in different directions over time, even though the same side of Europa always faces Jupiter.
source: http://www.nasa.gov/content/goddard/long-stressed-europa-likely-off-kilter-at-one-time/index.html#.UjxweGTwLEE
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