MMmotd September 2026

mmmotd@solar.physics.montana.edu

1 participants
24 discussions

MM#009 Default Target
by Max Millennium Chief Observer 04 Sep '26

04 Sep '26

Dear Collaborators, Solar activity has remained at a moderate level since the last message. The largest event during the period was an M1.2 flare at 07:45 UT today from the target region NOAA 14524 (N12E59, alpha/H-type). 14524 also produced seven C-class flares during the period, including C7.9 and C7.1 flares, and showed an increase in sunspot area. NOAA 14523 (N10E29, beta/C-type) produced three C-class flares, including a C6.9. Today, we will continue to watch NOAA 14524 as the target region. Further C-class activity is expected, with a chance of additional low M-class activity in the next 24 hours. The position of NOAA 14524 on September 4 at 11:30 UT is: N12E59 (-799", 136") 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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MM#009 Default Target
by Max Millennium Chief Observer 03 Sep '26

03 Sep '26

Dear Collaborators, Solar activity has reached moderate levels since the last message. The largest event during the period was an M3.0 flare at 18:57 UT yesterday from the limb target region, which has now been designated NOAA 14524 (N12E71, alpha/H-type). 14524 also produced four additional low C-class flares and several mid-to-high B-class flares during the period. NOAA 14523 (N11E42, beta/C-type) also became active, producing three low C-class flares, together with several mid- B-class flares in the period. Today, we will continue with NOAA 14524 as the target region. Further C-class activity is expected, with a chance of additional low M-class activity in the following 24 hours. The position of NOAA 14524 on September 3 at 11:30 UT is: N12E71 (-880", 158") 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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MM#009 Default Target
by Max Millennium Chief Observer 02 Sep '26

02 Sep '26

Dear Collaborators, Solar activity has increased slightly since the last message. Yesterday's target region, NOAA 14520 (S12W27, beta/D-type), produced only a B7.9 flare during the period and has decayed noticeably. The largest event in the period was a C5.7 flare at 21:04 UT yesterday from an unnumbered north east limb region (N12E80). This limb region also produced a C1.1 flare and two mid-B-class flares during the period. Today, the target will switch to this north east limb region. Further C- class activity is expected in the following 24 hours. The approximate position of the target region on Sep. 2 at 11:30 UT is: N12E80 (-920", 176") 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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MM#009 Default Target
by Max Millennium Chief Observer 01 Sep '26

01 Sep '26

Dear Collaborators, Solar activity remains at a very low level. The largest event during the period was a C1.1 flare at 08/31/17:56 UT from NOAA 14517 (N10W88). 14517 also produced several mid-to-high B-class flares during the period, but has now rotated completely over the west limb, with overlying loops visible above the limb. The target region NOAA 14520 (S12W14, beta/ D-type) produced only three mid-to-high B-class flares during the period, but showed increases in both sunspot area and spot number. Today, we will continue to watch NOAA 14520 as the target region. Further C-class activity is expected in the following 24 hours. The position of NOAA 14520 on September 1 at 11:30 UT is: S12W14 (225", -310") 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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MMmotd September 2026