Thetheoryisthatmagmaorpressurizedgasunder a volcanoincreasesasglaciersmeltbecausetheheavyicenolongerweighsdowntheEarth's crust, allowingmagmatomovemorefreelyunderground.
ButwithrecenteruptionsinGrindvik, a towninsouthwestIceland, whichnotonlyputon a spectacularlavashow, butalsoforcedtheevacuationofthetown's residents, scientistsareeagertolearnmoreaboutwhat's triggeringsuchvolatility.