MMmotd September 2024

mmmotd@solar.physics.montana.edu

1 participants
30 discussions

MM#009 Default Target
by Max Millennium Chief Observer 10 Sep '24

10 Sep '24

Dear Collaborators, Solar activity continues at a moderate level. The largest event since the last message was an M3.4 flare at 16:58 UT on September 9 produced by NOAA 13814 that has developed to a beta-gamma/ E-type configuration. 13814 also produced an M1.2 flare at 23:14 UT. Today we will switch the target to this region, which is emerging new magnetic flux in its intermediate portion. Yesterday's target NOAA 13808 plus its nearby regions produced four mid-C-class flares during the period and almost rotated beyond the west limb. Further low M-class flares are expected in the next 24 hours. The position of NOAA 13814 on September 10 at 07:30 UT is: N16E06 (-96", 146") 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, Ying Li (Purple Mountain Observatory)

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MM#009 Default Target
by Max Millennium Chief Observer 09 Sep '24

09 Sep '24

Dear Collaborators, Solar activity has been at a moderate level. The largest event since the last message was an M1.9 flare at 09/09/05:40 UT, which should be from/near the target region NOAA 13808. 13808 together with 13806 (S08W90, beta/C-type) produced a series of (five) low M-class flares when they were rotating over the west limb. We will watch 13808 (plus 13806) for a further/final 24 hours, whose loops are still visible above the limb. Please note that NOAA 13811 (S10W45) also produced two ~M1 flares during the period and had a beta-gamma/ D-type sunspot group. Further low M-class activities are very likely in the next 24 hours. The position of NOAA 13808 on September 9 at 15:30 UT is: S09W81 (929", -166") 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, Ying Li (Purple Mountain Observatory)

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MM#009 Default Target
by Max Millennium Chief Observer 08 Sep '24

08 Sep '24

Dear Collaborators, Solar activity has remained at a low-to-moderate level since the last message. Yesterday's target region NOAA 13815 (S28E08) retains its beta-gamma configuration but has shown relatively little dynamism in sunspot behaviour during the period. 13815 only produced a C4.4 flare at 17:39 UT yesterday. The largest event in the period was a C7.2 flare at 21:12 UT yesterday produced by NOAA 13808 (S09W65, beta/ C-type). NOAA 13808 and its nearby region NOAA 13806 (S08W74, beta-gamma/D-type) also produced another five C-class flares. The target region shall switch to NOAA 13808, due to its continued flux emergence and the flare history of 13808 and its nearby region NOAA 13806. Further C-class activity is expected, with a chance of low M-class flares in the next 24 hours. The position of NOAA 13808 on 8-Sep-2024 at 11:30 UT is: S09W65 (853",-198") 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 07 Sep '24

07 Sep '24

Dear Collaborators, The level of solar activity is low-to-moderate. The target region NOAA 13807 has now rotated completely out of view beyond the South West limb. 13807 has only produced a C5.1 flare since the last message. The largest event in the period was a long-duration M1.7 flare produced by NOAA 13813 (S24E10, beta-gamma/F-type) and 13815 (S30E16, beta-gamma/E-type). Today the target region shall switch to NOAA 13815 with a focus towards its leading spots, due to its continued magnetic flux emergence and the complexity of the magnetic field connection between 13815 and the nearby active regions. Please note that NOAA 13806 (S11W60, beta-gamma-delta/D-type) was the source of seven C-class flares in the period. Further C-class activity is likely, with a chance of low M-class flares in the next 24 hours. The position of NOAA 13815 on 7-Sep-2024 at 11:30 UT is: S30E16 (-227",-574") 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 06 Sep '24

06 Sep '24

Dear Collaborators, Solar activity has diminished since the last message. The largest event was a C7.9 flare at 14:03 UT yesterday from NOAA 13806 (S12W44, beta-gamma-delta/E-type). Target region NOAA 13807 (S15W91) has now rotated over the South West limb, with some overlying loops visible above the limb. 13807 remained the most flare-productive region in the period, being the source of over ten C-class flares, including three high C-class flares (two C7.8 and one C7.6). At this time, we are ending the Major Flare Watch but NOAA 13807 shall remain the target region, as it rotates fully out of view beyond the South West limb. Additional C-class activity is expected, with a chance of low M-class flares in the next 24 hours. The position of NOAA 13807 on 6-Sep-2024 at 11:30 UT is: S15W91 (918",-242") 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 05 Sep '24

05 Sep '24

Dear Collaborators, Solar activity has continued at a moderate level since the last message. NOAA 13807 (S15W79) was the most flare-productive region on disk, being the source of eight mid-C-class flares and five low-M-class flares during the period, including the largest magnitude in the period - an M2.8 at 08:47 UT today. The Major Flare Watch shall switch to NOAA13807 before it completely rotates over the west limb. Yesterday's target NOAA 13813 (S23E28) remains classified as a beta-gamma region and produced two M1 flares and three mid-C-class flares in the period. Please note that NOAA 13806 (S12W30, beta-gamma-delta/E-type) and 13811 (S11E11, beta/D-type) each produced an M1.2 flare in the period. Further low-M- class activity is expected, with a chance of an isolated ≥M5 flare from various regions in the next 24-48 hours. The position of NOAA 13807 on 5-Sep-2024 at 11:30 UT is: S15W79 (902",-266") 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 04 Sep '24

04 Sep '24

Dear Collaborators, Solar activity remains at a moderate level. The target region NOAA 13813 (S22E37) retains its beta-gamma configuration with a slight increase in both the sunspot area and the number of spots. The leading portion of this region shows mixed polarities and has produced five low-M-class flares in the period, the largest being an M3.3 on 3-Sep-2024 at 15:51 UT. The MM#003 Major Flare Watch continues with NOAA 13813 as the target, focusing on its leading spots. Further low-M-class activity is likely, with a chance of an isolated ≥M5 flare in the next 24-48 hours. The position of NOAA 13813 on 4-Sep-2024 at 11:30 UT is: S22E37 (-532",-443") 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 03 Sep '24

03 Sep '24

Dear Collaborators, Solar activity has slightly increased since the last message. The target region has now been designated as NOAA 13813 (S22E51, beta-gamma/D-type). This region produced three low-M-class flares and one high-C-class flare during the period, while the largest magnitude flare in the period was an M2.9 on 2-Sep-2024 at 13:33 UT from NOAA 13807 (S16W52, beta- gamma/E-type). 13807 also produced another two low-M-class flares and over ten mid-C-class flares in the period. However, the Major Flare Watch will continue with NOAA 13813 as the target region for a further 24 hours, due to its prior flaring history. Further M-class activity is likely, with a chance of an isolated ≥M5 flare in the next 24-48 hours. The position of NOAA 13813 on 3-Sep-2024 at 11:30 UT is: S22E51 (-686",-424") 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 02 Sep '24

02 Sep '24

Dear Collaborators, The level of solar activity is moderate. The largest event since the last message was an M2.0 flare produced by the leading spots of the limb target region (S20E70). This region also produced an M1.1 flare during the period. The Major Flare Watch will continue with this South East limb region. Please note that NOAA 13807 (S16W38, beta-gamma/ E-type) was the source of an M1.5 flare and three mid-C-class flares in the period. Further C- and low-M-class flares are expected in the next 24-48 hours, with a chance of >=M5 events. The approximate position of the target region on 2-Sep-2024 at 11:30 UT is: S20E70, ( -840", -361" ) 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 01 Sep '24

01 Sep '24

Dear Collaborators, Solar activity is at a moderate-to-high level. Target region NOAA 13806 maintained spot area but increased in number of spots while losing its delta-spot configuration to be classified as a beta-gamma/E-type sunspot group. NOAA 13806 produced high C-class activity, but the region located beyond the South East limb mentioned in yesterday's message continued to produce M-class flares - an impulsive M1.4 and a long-duration M5.5 on 1-Sep-2024 at 07:47 UT and 11:41 UT, respectively. At this point we are initiating a MM#003 Major Flare Watch on this South East limb region. High C-class flares are expected in the following 24 hours, with a good chance for more flares >=M5. The approximate position of this region on 1-Sep-2024 at 18:00 UT is: S21E90 , ( -895" , -333" ) 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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MMmotd September 2024