Dear Collaborators,

Solar activity is at a moderate level. The largest event since the last message was an M4.0 flare at 20:01 UT yesterday from the target region NOAA 13435 (N09E38). 13435 has increased in magnetic complexity and been classified as a beta-delta/D-type sunspot group. It also produced three C-class flares during the period, including a C9.7 and two C3 flares. This region shall continue as the target region. If possible, please also include NOAA 13438 (N10E30) nearby in the field of view, which produced a low-C flare in the period and has been classified as a beta-gamma/D-type configuration. Additionally, NOAA 13436 (N20W53) remained active and has been designated as a beta-gamma/D-type configuration, which also produced five low-C flares in the period. Further C-class flares are expected over the next 24 hours, with a good chance for more M-class flares.

The position of NOAA 13435 on 20-Sep-2023 at 07:30 UT is:

N09E38 (-582" , 56")

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,

De-Chao Song (Purple Mountain Observatory)