Dear Collaborators,
The level of solar activity is low. The largest event in the past
24 hours was a C3.4 flare at 13:54 UT yesterday from the
target region NOAA 14217. This region also produced four
~C2 flares and was classified as a beta/C-type. Today, the
target will remain with 14217 for a further 24 hours. In addition,
an unnumbered region beyond the northwest limb also produced
five ~C2 flares, including its largest being a C2.4 at 06:14 UT
today. More low-C activity is expected from these two regions
in the next 24 hours.
The position of NOAA 14217 on 26-Sep-2025 at 11:30 UT is:
S17W82 (906", -293")
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)
Dear Collaborators,
Solar activity has been at a moderate-to-low level since the
last message. NOAA 14224 (beta/C-type, S13W57) produced
the largest event – an M1.6 at 18:57 UT yesterday and a C2.2
flare. The target region, NOAA 14217, was the source of four
low-C flares. It has developed into a beta-gamma/D-type
sunspot group. Today, the target shall continue as 14217 (with
NOAA 14224 in the field of view). Note that NOAA 14226
(beta-gamma/D-type, S11E11) also produced two ~C5 flares
in the period. Further C-class activity is expected with another
low-M flare likely in the following 24 hours.
The position of NOAA 14217 on 25-Sep-2025 at 11:30 UT is:
S17W68 (849", -319")
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)
Dear Collaborators,
Solar activity has remained at a moderate level in the past 24
hours. The largest event was an M1.0 flare at 09:18 UT today,
produced by a region between NOAA 14224 and the target
region NOAA 14217. 14224 (S13W43) also produced a C6.7
and three low-C flares, although it was downgraded to a
beta/C-type magnetic configuration. 14217 also produced three
~C3 flares and remains a beta-gamma/C-type configuration,
showing signs of new magnetic flux emergence. Today, the
target shall continue as 14217, but if possible, please also
include NOAA 14224 in your field of view. Further C-class
activity is expected with additional low-M flares probable in the
coming 24 hours.
The position of NOAA 14217 on 24-Sep-2025 at 11:30 UT is:
S16W55 (754", -326")
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)
Dear Collaborators,
Solar activity has reached a moderate level, due to an M1.0
flare at 10:24 UT today from the target region NOAA 14217.
This region has grown in its magnetic complexity to a
beta-gamma/C-type group. Today, the target shall remain with
14217. More C-class activity is expected with another low-M
flare likely over the next 24 hours.
The position of NOAA 14217 on 23-Sep-2025 at 11:30 UT is:
S16W38 (567", -351")
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)
Dear Collaborators,
Solar activity has increased to an intermediate level since the
last message. The largest event was a C6.6 flare at 21:04 UT
yesterday from a region between NOAAs 14224 (beta-gamma/D-type,
S13W15) and 14223 (alpha/A-type, S17W14). To the east of
14223, NOAA 14217 produced six low-C flares, with its largest
being a C2.7 at 21:27 UT yesterday. 14217 retains a beta/E-type
sunspot group, with the emergence of new spots. Today, the
target shall switch to NOAA 14217. Yesterday’s target, NOAA
14220 (beta-gamma/E-type, S18W62) was merely the source of
a C2.3 flare at 17:01 UT yesterday. Additional low-C activity is
expected in the following 24 hours.
The position of NOAA 14217 on 22-Sep-2025 at 11:30 UT is:
S17W26 (402", -379")
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)
Dear Collaborators,
Solar activity continues to be low since the last message.
Yesterday's target, NOAA 14216 did not show further activity during
the past 24 hours, while NOAA 14220 resumed to produce flares with
the largest being a C3.4 flare at 19:57 UT yesterday (9/20).
Today, the default target will switch back to NOAA 14220, on the
area of mixed polarity of the trailing sunspot. Additional C class
activities are expected.
The position of the target in NOAA 14220 on 21-September-2025 at
15:30 UT is: S18W47 (673", -368").
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,
Aki Takeda (Montana State University)
---
Dear Collaborators,
Solar activity had slightly increased after the last message, but
retuned to low in the latest 10 hours. There were several flare
activities from the region between NOAA 14216 and 14222, with the
largest being an M1.5 at 21:22 UT yesterday(9/19). Since both
regions do not show signs of new flux, these events were produced
in the phase of their decay. The target region, NOAA 14220 maintains
its size and magnetic complexity of a beta-gamma type, but it did
not show any flare activity in the past 24 hours.
While the target region NOAA 14220 is in a dormant state, NOAA
14216 and 14222 are producing low-C class activities. In the next 24
hours, our default target is moved to the trailing sunspot area of
NOAA 14216, expecting additional C class activities from this region.
The position of the target in NOAA 14216 on 20-September-2025 at
16:00 UT is: N10W36 (557", 86").
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,
Aki Takeda (Montana State University)
---
Dear Collaborators,
Solar activity continues to be low, but slightly increased from the
last message. The largest event in the past 24 hours was a C3.6 flare
at 15:34 UT yesterday (9/18) from the target region, NOAA 14220. This
region has further develped to a size of 250 millionths, having
produced 7 C classs flares since the last message. The magnetic
complexity of its trailing sunspots was also increased and now
classified as a beta-gamma type. In the next 24 hours, we will
continue to observe NOAA 14220, expecting additional C class events
or larger.
The position of the target in NOAA 14220 on 19-September-2025 at
15:30 UT is: S17W21 (337", -394").
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,
Aki Takeda (Montana State University)
---
Dear Collaborators,
Solar activity continues to be low since the last message.
The largest event in the past 24 hours was a C2.8 flare at 23:55 UT
yesterday (9/17) from NOAA 14223 in the Southeast quadrant.
NOAA 14216 located near the disk center had a new flux emergence
and developed to a beta-gamma type, but kept flare-quiet in the past
24 hours.
The target region, NOAA 14220 continued to grow in both size and
number of sunspots and produced 6 low-C class flares since the last
message. There appeared EUV loops connecting this region to NOAA
14216 over the equator. Today we will continue to observe NOAA
14220 as the default target. Additional low-C class events or larger
are expected.
The position of the target in NOAA 14220 on 18-September-2025 at
16:30 UT is: S17W08 (136", -400").
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,
Aki Takeda (Montana State University)
Dear Collaborators,
Solar activity returned to a very low level since the last message.
The largest event in the past 24 hours was a C2.6 flare at 16:58 UT
yesterday (9/16) from NOAA 14216, while the target region, NOAA
14217 showed no flare activity since the last message.
NOAA 14220 is a bipolar region that emerged yesterday now approaching
the Southern central meridian. Although this region produced only low-C
class flares in the past 24 hours, it is worth noting that its trailing
(positive
polarity) sunspot appears to be larger and is located at lower latitude than
its leading portion. Today, we will switch the default target to this
region,
NOAA 14220.
The position of the target in NOAA 14220 on 17-September-2025 at
16:30 UT is: S17E04 (-67", -402").
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,
Aki Takeda (Montana State University)