On: First water plume seen firing from Jupiter moon Europa

[deletes]

Not really. https://www.youtube.com/watch?v=Fot3m7kyLn4

Also. http://en.wikipedia.org/wiki/Supercooling

[yongjik → deletes]

From your link: A liquid below its standard freezing point will crystallize in the presence of a seed crystal or nucleus around which a crystal structure can form creating a solid.

Europa's ocean is surrounded by a vast sheet of actual ice. You can't keep such an ocean at supercooled state.

[Thrymr → deletes]

It's not likely that an entire large planetary body will maintain a state out of equilibrium for geological periods of time. Supercooling is unstable.

[mturmon → deletes]

So, I'm assuming you don't have any basis for your assertion above? Because this is nothing to do with Europa.