Assertion: sunspot | /r/CapableOf | produce massive x6.9-class solar flare
Facets:
value: as of may
type: TEMPORAL
value: on august 9 at 08:05 ut
type: TEMPORAL
Source sentences:
text: On August 9 at 08:05 UT, sunspot 1263 produced a massive X6.9-class solar flare, the third X-flare of Solar Cycle 24 and the most powerful so far (as of May 2013).