In this Astronomy SE answer to How can "Geysers" on Europa reach heights of 100km? there is discussion of the possible role of pressure at the top of Europa's ocean in the ability of the recently observed vapor plumes to reach 100 to 200 kilometers above the surface. Europa has a surface gravity of about 1.3 $m/s^2$ and it would take a velocity of 500 $m/s$ to rise ballistically to 100 kilometers for example.
In this question I am just asking if there have been any determinations, either inferred from observations or from simulations, of the pressure of the water at the top of the ocean where it meets the ice. Something quantitative? A number, even roughly?
If it's highly variable with time due to tidal effects, then it's the highest pressure that's more interesting.
A first guess might be that the pressure is what you'd get by calculating the weight per unit area of the ice above. In that case, if there is a crack, the water would rise approximately to the surface of the ice and the pressure would drop to approximately zero. What I am after is if there is ever any substantial pressure beyond this - does the pressure ever deviate so much higher than that, that it would become important in the discussion of cryovolcanos, geysers, and jets?
But here I'm just asking about determinations of pressure.
above: Diagram of Europa's Ice surface and subsurface ocean, from the JPL News feature Scientists Find Evidence of 'Diving' Tectonic Plates on Europa.