MMmotd September 2026

mmmotd@solar.physics.montana.edu

1 participants
23 discussions

MM#009 Default Target
by Max Millennium Chief Observer 23 Sep '26

23 Sep '26

Dear Collaborators, Solar activity persists at a low level. The largest flare produced in the last 24 hours was a C2.4 from NOAA 14534 at 17:11 UT yesterday. NOAA 14535 has produced four flares since the last message but its development appears to have stagnated. Several regions are clustered in the northwestern portion of the limb about NOAA 14534, and as such this region may see further activity. The target region will switch to NOAA 14534 and the surrounding regions for the next 24 hours. Further B-class and low C-class activity is expected. The position of NOAA 14534 on 23-Sep-2026 at 03:30 UT is: N11W37, (566", 89") 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, Harry Greatorex (Queen's University Belfast)

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MM#009 Default Target
by Max Millennium Chief Observer 22 Sep '26

22 Sep '26

Dear Collaborators, Solar activity remains at a low level. Only a small number of flares were produced since the last message, the largest was a C2.0 from NOAA 14536 at 04:27 UT today. The target region has moved further onto the disk and still appears to show the greatest evidence of emerging flux of the visible regions. Despite this, general activity levels are expected to remain low, further B-class and low C-class activity is likely in the next 24 hours. The position of NOAA 14535 on 22-Sep-2026 at 07:30 UT is: N12E54, (-758", 129") 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, Harry Greatorex (Queen's University Belfast)

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MM#009 Default Target
by Max Millennium Chief Observer 21 Sep '26

21 Sep '26

Dear Collaborators, Solar activity is at a low level. Several flares have been produced since the last message, the largest being a C3.7 from NOAA 14534 at 22:25 UT yesterday. The target region is now numbered as NOAA 14535 and despite remaining relatively quiet since the last message, this region appears to show moderate signs of emerging flux as it progresses further onto the solar disk. NOAA 14535 will remain the target region, further B and low C-class activity is expected in the next 24 hours. The position of NOAA 14535 on 21-Sep-2026 at 07:30 UT is: N12E69, (-873", 156") 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, Harry Greatorex (Queen's University Belfast)

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MM#009 Default Target
by Max Millennium Chief Observer 20 Sep '26

20 Sep '26

Dear Collaborators, Solar activity has grown to a low-C level in the past 24 hours. Most flares originated from the region near the northeast limb (N11E86), which produced nine flares, the largest being a C3.3 at 17:57 UT yesterday. This northeast limb region now becomes today’s target. Yesterday’s target (S15E76) produced only two B-class flares. Further B-class activity is expected, with another low-C flare likely over the next 24 hours. The approximate position of the target on 20-Sep-2026 11:30 UT is: N11E86 (-930", 190") 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, Qiao Li (Purple Mountain Observatory)

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MM#009 Default Target
by Max Millennium Chief Observer 19 Sep '26

19 Sep '26

Dear Collaborators, Solar activity has reached a high-B level since the last message. Ten B-class flares were produced by two regions near the east limb. The region in the northern quadrant generated the largest event, a B9.9 flare at 01:09 UT and a B5 flare. The region in the southern quadrant produced eight B-class flares, with its largest being a B8.4 at 08:12 UT. Today, the target will switch to the southeast limb region. B-class activity is expected over the following 24 hours. The approximate position of the target on 19-Sep-2026 11:30 UT is: S12E77 (-910", 200") 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, Qiao Li (Purple Mountain Observatory)

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MM#009 Default Target
by Max Millennium Chief Observer 18 Sep '26

18 Sep '26

Dear Collaborators, Solar activity has dropped to a low-B level. NOAA 14521 produced two ~B3 flares, but it has completely rotated out of Earth's view. The target region only showed some EUV brightenings. Today, the target shall remain in the spotless region. B-class activity is expected in the next 24 hours. The approximate position of the target on 18-Sep-2026 15:30 UT is: N04E30 (-469", 65") 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, Qiao Li (Purple Mountain Observatory)

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MM#009 Default Target
by Max Millennium Chief Observer 17 Sep '26

17 Sep '26

Dear Collaborators, Solar activity has remained at a high-B level since the last message. The largest event was a B7.9 flare at 22:16 UT yesterday, produced by the target region. This spotless region has undergone the emergence of new magnetic fluxes in its northeast portion. B-class activity is expected in the coming 24 hours. The approximate position of the target on 17-Sep-2026 11:30 UT is: N05E44 (-650", 110") 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, Qiao Li (Purple Mountain Observatory)

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MM#009 Default Target
by Max Millennium Chief Observer 16 Sep '26

16 Sep '26

Dear Collaborators, Solar activity has declined to a ~B5 level since the last message. A spotless region near the northeast limb produced four flares, with the largest being a B5.5 at 14:57 UT yesterday. This region should become today's target. B-class activity is expected over the following 24 hours. The approximate position of the target on 16-Sep-2026 11:30 UT is: N06E66 (-872", 90") 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, Qiao Li (Purple Mountain Observatory)

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MM#009 Default Target
by Max Millennium Chief Observer 15 Sep '26

15 Sep '26

Dear Collaborators, Solar activity has continued at a C1 level since the last message. NOAA 14530 produced three flares, with the largest being a C1.0 at 14:29 UT yesterday. Today, the target will switch to 14530. B-class activity is expected in the next 24 hours. The position of NOAA 14530 on 15-Sep-2026 12:58 UT is: N19W85 (898", 298") 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, Qiao Li (Purple Mountain Observatory)

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MM#009 Default Target
by Max Millennium Chief Observer 14 Sep '26

14 Sep '26

Dear Collaborators, Solar activity has remained at ~C1 levels since the last message. A spotless region (S14W07) produced the largest event, a C1.4 at 19:12 UT today. The target region NOAA 14529 (beta/C-type) produced a B9.2 at 17:49 UT yesterday, but has shown signs of decay. Today the target shall continue at 14529. Additional high-B activity is expected in the next 24 hours. The position of NOAA 14529 on 14-Sep-2026 11:30 UT is: N12W39 (588", 105") 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, Qiao Li (Purple Mountain Observatory)

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