A cryoseism is a non-tectonic earthquake caused by freezing action in ice, ice-soil and ice-rock materials. It can occur under perennial or seasonal frost conditions. Crysoseisms of intensity IVMM or VMM are characterized by ground rupture and localized felt area. The discrimination of cryoseisms from tectonic earthquakes is necessary to evaluate the true seismicity of a region of low to moderate seismicity such as the northeastern United States.

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