Assertion: earthquake's focus | /r/HasProperty | obtained
Facets:
value: the time of occurrence,
type: TEMPORAL
value: from seismographs
type: OTHER
value: from data
type: OTHER
Source sentences:
text: The time of occurrence, the duration of shaking, the locations of the epicenter and focus, and estimates of the energy released can be obtained from data from seismographs set up around the world.