Frostskælv

En frostskælv (cryoseism) opstår, når jorden er mættet med vand, især jordlaget på overfladen, og så sker hurtig frysning. Vand udvides, når det fryser og stress opbygges, indtil det frigives. Dette skaber lokal jordskakning og ofte forveksles med et jordskælv. Den lyd det producerer ligner eksplosion eller pistol skud. Nogle gange frembringer en frostskælv en synlig revne langs jorden.

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