SOLAR ACTIVITY: A big new sunspot (AR1618) has emerged near the center of the solar disk, and it is crackling with strong M-class solar flares.  NOAA forecasters estimate a 70% chance of more M-flares today, and a 15% chance of powerful X-flares.  If the rapid growth of AR1618 continues apace, the Thanksgiving holiday (USA) could be filled with stormy space weather.  Check for updates.