SPX vs Solar Flux & Lunar Cycle
Active Region 1613, located in southern hemisphere, produced three M-class solar flares in last 6 hours. At 23:28 UTC, November 12, 2012 it peaked with M2.0 solar flare, then on November 13, 2012 at 02:04 an impulsive M6.0 peaked followed by M2.5 at 05:50 UTC (HERE).
See also HERE & HERE
