Dear Collaborators,
Numerous low C-class flares were produced by various active regions, two by the target NOAA 12911 (beta/C-type), one by 12907 (S19E09, beta-gamma/D-type), one by 12908 (S20E27, beta-gamma/D-type), one by a limb region (S18E89), and five by 12909 (S21E39, beta/D-type) including the largest one, a C2.3 at 12/17/12:55 UT. 12911 retains its beta/C-type sunspot group while increasing the sunspot area. More C-class activities are expected with a slight chance of an M-class event in the next 24 hours.
The position of NOAA 12911 on December 18 at 04:30 UT is:
N19E51 (-718", 331")
See http://www.SolarMonitor.org for images and http://solar.physics.montana.edu/max_millennium/ops/observing.shtml for a description of the current Max Millennium Observing Plan.
Regards,
Ying Li (Purple Mountain Observatory)
mmmotd@solar.physics.montana.edu