One of the largest sunspot groups in years rotated over the sun’s northeastern limb this weekend. With a least four dark cores larger than Earth, AR1476 sprawls more than 100,000 km from end to end, and makes an easy target for backyard solar telescopes.
Sunspot AR1471 erupted on May 7th, producing 11 C-Class flares and Sunspot Combi 1770 and 1471 a M1.9-class solar flare and an Earth-directed coronal mass ejection (CME). According to a forecast track prepared by analysts at the Goddard Space Weather lab, the cloud will reach Earth on May 9th at 13:40 UT (+/- 7 hours).
The active region is crackling with impulsive M-class solar flares. So far three M-Class flares have been recorded. Based on the sunspot’s complex ‘beta-gamma’ magnetic field, NOAA forecasters estimate a 75% chance of more M-flares during the next 24 hours. There is also a 10% chance of powerful X-flares.
More information: NWS space weather prediction center