Assertion: frost quake | /r/HasProperty | recorded
Facets:
value: within 2 hours
type: TEMPORAL
Source sentences:
text: Seismic trace of a typical frost quake recorded on the vertical component of the seismic station in Sadowa, Ontario, near Georgian Bay (SADO), January 18, 2000 at 6:55 pm, a very cold night (12 frost quakes were recorded within 2 hours that night).