Assertion: geyser's interval | /r/CapableOf | average 66.5 minutes
Facets:
value: in 1939
type: TEMPORAL
Source sentences:
text: Intervals between eruptions can range from 60 to 110 minutes, averaging 66.5 minutes in 1939, slowly increasing to an average of 90 minutes apart today, which may be the result of earthquakes affecting subterranean water levels.