Dear Collaborators,

The level of solar activity low-to-moderate. Target region NOAA 13639 grew in sunspot area and number of spots since the last message, and has now been reclassified as a beta-gamma-delta/E-type sunspot group. NOAA regions 13639 and 13634 (now a beta/D-type sunspot group) have both reduced in peak flaring magnitude, with only a C2.3 flare from NOAA 13634 (on 17-Apr-2024 at 04:43 UT) and nine C-class flares from NOAA 13639, with the largest being a C8.1 on 17-Apr-2024 at 03:13 UT. The largest magnitude flare in the period was an M1.1 from NOAA 13637 (a beta-delta/D-type sunspot group) on 16-Apr-2024 at 17:49 UT. The MM#003 Major Flare Watch will continue with NOAA 13639 as the target for another 24 hours. Further low M-class flares are possible in the next 24 hours, with a chance for an isolated >M5 flare.

The position of NOAA 13639 on 17-Apr-2024 at 15:00 UT is:

N29E28 , ( -394", 532" )

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,

Shaun Bloomfield (Northumbria University)