Assertion: lava's surface | /r/CapableOf | subside at least 100 m
Facets:
value: during the past couple weeks
type: TEMPORAL
Source sentences:
text: The obvious flat surface is the former Halema‘uma‘u crater floor, which has subsided at least 100 m (about 300 ft) during the past couple weeks,’ USGS explained in a Facebook update last Wednesday.