Frostquakes
People in Canada have reported large booming sound... ...ead to any explosives. What they are hearing are " frostquakes ," which is kind of like an earthquake, but produc... ...the cold weather.Known to experts as cryoseisms, frostquakes happen when moisture that has seeped into the gro... ...Coulson of Envir...
https://www.neatorama.com/2014/01/07/Frostquakes/
