Assertion: sunspot's region | /r/CapableOf | erupt powerful x5.4-class flare
Facets:
value: at 00:24 utc
type: TEMPORAL
value: on march
type: TEMPORAL
Source sentences:
text: After releasing up to nine M-class flares in only one day, the active region 1429 erupted a powerful X5.4-class flare at 00:24 UTC on March 7.