[Strategerist]

It’s been proposed that big impacts cause volcanism on the OPPOSITE side of the earth through focusing of seismic energy there.

Very controversial though.

[wolfcreek]

Well the Earth isn’t solid. If you look at it as a ball full of liquid that you shoot with a bullet, the reaction might occur anywhere on it’s surface due to it’s irregularity.

[xcamel]

This has been proved now - they found the giant impact crater under Antarctica (off the coast) almost exactly opposite of where the massive Russia crust collapse/volcanic disaster would have been when it hit.