It can be done in 1973 Greenland had a volcano go off and it threatened to destroy the town and harbor .
But by using massive amounts of sea water to cool teh Lava they saved the town and harbor this being the first time humans effected something so huge .
Well It has been done again as of today 12/14/2017
Fester Not only stopped a volcano But put it compleatly out even after a eruption .
now the town is safe and not even one tile of lava remains