Steamboat Geyser is the biggest geyser in the world when it blows, shooting water four hundred feet into the air, but the intervals between its eruptions have ranged from as little as four days to almost fifty years.
The shell at Enceladus may be less than a mile thick at the south pole, where the geysers erupt, but estimates for Europa's rind suggest it's considerably thicker.
The researchers studied measurements taken by Cassini as it passed through salt-rich ice grains released into space by geysers found on the southern part of the moon.
Scientists suspected cryovolcanism, and that was confirmed quite dramatically in 2005 when Cassini spotted active geysers of water spewing from the south pole of Enceladus!
Next, add Strokkur to your list of soakable locations and enjoy the added bonus of impressive geysers whose bursting flows of water will make you jump.