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Dear Collaborators,
Solar activity has remained at a moderate level over the past 24 hours. Yesterday's target NOAA 13443 (N28W61) only produced 4 low-C flares although it was classified as a beta-delta/D-type sunspot region. The largest event since the last message was an M4.4 flare at 03:17 UT today from NOAA 13445 (S15E12, beta/D-type). 13445 has increased significantly in terms of spot area and number of spots in the period and produced another two M1 (M1.2 and M1.9) and fourteen C-class flares in the period. Today the Major Flare Watch region will switch to NOAA 13445 due to its high frequency of flaring and current helicity. Please note that a region behind the northwest limb (possibly NOAA 13436) produced an occulted M1.6 flare at 20:14 UT yesterday. Sustained intermediate level activities are expected, with a chance for above M5 flares over the next 24 hours. The position of NOAA 13445 on 24-Sep-2023 at 11:30 UT is: S15E12 (-192" , -357") 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)
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