Assertion: new madrid seismic zone | /r/CapableOf | produce several of magnitude
Facets:
value: repeatedly
type: TEMPORAL
value: over the past 4,500 years
type: TEMPORAL
Source sentences:
text: The geologic record of pre-1811 earthquakes also reveals that the New Madrid seismic zone has repeatedly produced sequences of major earthquakes, including several of magnitude 7 to 8, over the past 4,500 years.