There's nots of hteoriesa about the Kursk, including that it was an experimental torpedo using supercavitation technology, that went haywire and blew up.
Fact is, I doubt that anything will happen more than an honorable discharge. If it wasn't on the maps, then there was nothing they could do. They were on operations, and as such, run silent. Silent does not include actively making noise so that everyone around you knows where you are. Passive sonar only picks up noise, so unless that mountain was erupting, there would be no way of seeing where it was.