MMmotd

mmmotd@solar.physics.montana.edu

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5064 discussions

MM#009 Default Target
by Max Millennium Chief Observer 25 Sep '23

25 Sep '23

Dear Collaborators, Solar activity has diminished over the past 24 hours. The largest event in the period was an M1.0 flare at 14:51 UT yesterday produced by NOAA 13443 (N28W75, beta-gamma/E-type). Target region NOAA 13445 (S14W02) has grown slightly in spot area and increased in magnetic complexity since the last message, which has been classified as a beta-delta/D-type sunspot group. It remained the most flare-productive region with being the source of twelve C-class flares. NOAA 13445 shall continue as the target region, although we are ending the Major Flare Watch at this time. If possible, please also include a newly emerged region (S22E18) near the target in the field of view. This region has just produced a C9.9 flare and is still experiencing the emergence of new magnetic fluxes. Additional C-class flares are expected over the following 24-hour period, with a chance for low M-class flares. The position of NOAA 13445 on 25-Sep-2023 at 11:30 UT is: 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#003 Major Flare Watch
by Max Millennium Chief Observer 24 Sep '23

24 Sep '23

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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MM#003 Major Flare Watch
by Max Millennium Chief Observer 23 Sep '23

23 Sep '23

Dear Collaborators, The level of solar activity is moderate. Yesterday's target NOAA 13435 (N09W04, beta/D-type) only produced one C7.3 flare in the period while NOAA 13443 (N28W47) was the source of three M1 flares, the largest of which was an M1.9 on 22-Sep-2023 at 22:25 UT. The Major Flare Watch shall remain in effect, but the target shall switch from NOAA 13435 to NOAA 13443. The new target is classified as a beta-gamma region and continues to develop due to flux emergence in its edges. Please note that NOAA 13445 (S15E26, beta/D-type) also produced eight C-class flares in the period, and NOAA 13437 (S18W76, beta/D-type) produced a C9.9 flare on 22-Sep-2023 at 19:20 UT. Low M-class activities are still expected over the following 24 hours, with a slight chance of an above M5 flare. The position of NOAA 13443 on 23-Sep-2023 at 11:30 UT is: N28W47 (618" , 375") 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#003 Major Flare Watch
by Max Millennium Chief Observer 22 Sep '23

22 Sep '23

Dear Collaborators, Solar activity continues at a high level for the past 24 hours. The largest event since the last message was an M8.7 flare at 12:42 UT yesterday produced by the target region NOAA 13435 (N08E12). 13435 also produced another M1.2 flare at 02:25 UT today and has retained its beta-delta/D-type magnetic configuration. We shall continue with the Major Flare Watch in effect with NOAA 13435 as the target region. Additional low M-class flares are expected with a chance of another >M5 flare in the next few days. The position of NOAA 13435 on 22-Sep-2023 at 07:30 UT is: N08E12 (-197" , 18") 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#003 Major Flare Watch
by Max Millennium Chief Observer 21 Sep '23

21 Sep '23

Dear Collaborators, Solar activity is at a high level. The largest event since the last message is an M8.2 flare at 14:11 UT yesterday from the target region NOAA 13435, which has retained its beta-delta/D-type magnetic configuration and shall remain the target region. Moreover, the nearby region NOAA 13438 (N10E16, beta/C-type) also produced six low-to-moderate C-class flares in the period. As such we are implementing a Major Flare Watch campaign at this time. More C-class flares are expected over the following 24-hour period, with a good chance of additional M-class activity. The position of NOAA 13435 on 21-Sep-2023 at 07:30 UT is: N09E25 (-400" , 42") 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 20 Sep '23

20 Sep '23

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)

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MM#009 Default Target
by Max Millennium Chief Observer 19 Sep '23

19 Sep '23

Dear Collaborators, Solar activity has reached an intermediate level. The largest event since the last message was an M1.8 flare at 09:23 UT today from the target region NOAA 13435 (N09E52, beta/C-type). 13435 also produced another M1.1 plus two low-C flares in the period. Today the target shall still be this region. Please note that NOAA 13436 (N19W40, beta/D-type) and 13429 (N12W54, beta/C-type) also produced many low- and mid-C flares during the period. Additional C-class flares are expected in the following 24-hour period, with a good chance for further low M-class flares. The position of NOAA 13435 on 19-Sep-2023 at 07:30 UT is: N09E52 ( -745" , 76") 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 18 Sep '23

18 Sep '23

Dear Collaborators, Solar activity is at a low level. The largest event since the last message was a C2.6 flare at 10:31 UT today from the target region NOAA 13435. 13435 retained its beta/D-type configuration and produced another three C1-class flares in the period. NOAA 13435 shall continue as the target region. Please note that an active region (unnumbered yet) to the east of 13435 underwent negative flux emergence in its southern portion. If possible, please also include this region in your field of view. Besides, two limb regions (NOAA 13425 and 13430) produced three C1-class flares as well. Additional C-class activities are expected over the next 24 hours. The position of NOAA 13435 on 18-Sep-2023 at 11:30 UT is: N10E53 ( -752" , 94" ) 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 17 Sep '23

17 Sep '23

Dear Collaborators, The level of solar activity is low-to-moderate. Target region NOAA 13429 has decayed since the last message, and is now classified as a beta-gamma/D-type group. NOAA 13429 has not produced any flares in the period. NOAA 13435 is a newly numbered region that recently rotated on disk over the East limb. This region is classified as a beta/D-type sunspot group and was the most flare-productive region with being the source of three C-class flares, the largest of which was a C3.5 on 17-Sep-2023 at 15:55 UT. Further C-class activity is expected over the next 24 hours. The position of NOAA 13435 on 17-Sep-2023 at 18:00 UT is: N10E59 , ( -808", 104" ) 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)

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MM#009 Default Target
by Max Millennium Chief Observer 16 Sep '23

16 Sep '23

Dear Collaborators, Solar activity is at a moderate level. Target region NOAA 13429 has been stable in terms of spot area and number of spots since the last message. Its development of a delta configuration late yesterday was confirmed through its designation as a beta-gamma-delta/D-type group. NOAA 13429 produced nearly every C-class flare in the period and all of the three M-class flares that occurred, the largest being an M3.3 on 16-Sep-2023 at 05:28 UT. We are NOT starting an MM#003 Major Flare Watch at this point mainly because NOAA 13429 has not undergone fresh flux emergence - this region will be monitored closely in case this changes. C-class flares are expected in the following 24-hour period, with a strong chance for more low-to-mid M-class flares. The position of NOAA 13429 on 16-Sep-2023 at 20:00 UT is: N11W20 , ( 322", 71" ) 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)

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