[RadioAstronomer]

I think it means 'volcanic eruption'

Yup, I knew what they meant, just that it was not clearly written and I was having a bit of fun :-).

[MHGinTN]

I'm not much on geology, so, wouldn't an eruption of this magnitude, with no other eruptions across the surface indicate an impact cause?

[MHGinTN]

Wow, all that 'grabitational' force on Io must be positively wrenching!