Assertion: volcano's eruption | /r/HasProperty | measured on a scale of 1 to 7
Facets:
value: on the volcanic
type: LOCATION
Source sentences:
text: Volcanic eruptions are measured on a scale of 1 to 7 on the Volcanic Explosivity Index (VEI), 7 being the most severe, apocalyptic, "super volcano" variety that generally only occur once every eon or so.