Big, weird bulge on Ganymede Options

[MarcF]

Hi Paul,
Great discovery, congratulations.

http://news.nationalgeographic.com/2015/03...an-ice-science/

"The size and location of Ganymede’s bulge, which appears to be made of thick ice, suggest that once upon a time, the moon’s icy shell rotated atop the rest of the moon, like an interplanetary Magic 8 Ball."
So this is a new indication that there is an ocean underneath the ice crust.
I did not find any details about the precise location of the bulge. Does it correspond to one of the mass anomalies detected by Galileo ?
Regards,
Marc.