After a whole day and a half with no significant solar activity, newly-designated AR3685 — currently the largest active sunspot region on the visible disk as it rounds the east limb — just produced an M7.2 X-ray flare (R2 – Moderate radio blackout). This is on top of the X2.9 flare it produced while it was still on the far side of the limb, suggesting that its transit across the disk will be a busy one. #solarflare#spaceweather#spacewx
