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)
Dear Collaborators,
Solar activity continued to be low after the last message, but for the
recent several hours, the GOES/XRS background has been elevated
to a C3 level due to the new regions; one appeared from the Southeast
limb (yet unnumbered), and another NOAA 14220 emerged at S17E18.
The largest event reported in the past 24 hours was a C3.8 flare at
13:09 UT today (9/16) from NOAA 14220, while the Southeast region
has produced 5 C1 class flares and a C3.2 flare(12:12 UT today).
Yesterday's target, NOAA 14217 also produced 3 low-C class flares
since the last message.
Although these new regions are currently showing more activity than
the target region, it is still uncertain if they grow further or settle.
In the next 24 hours, our target remains to be NOAA 14217, on its
leading sunspot expecting additional C class flares.
The position of the target in NOAA 14217 on 16-September-2025 at
16:00 UT is: S15E49 (-696", -322").
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 at a low level since the last message.
The largest event in the past 24 hours was a C3.8 flare at 15:18 UT
yesterday(9/14) from the Southeast region, numbered as NOAA 14217.
This region produced several more low-C class flares in the last 24
hours, while the target region, NOAA 14216 only produced a C2.1 flares
at 9:52 UT today. Today, we will switch the target to NOAA 14217
because of the recent flare history. We will observe its leading
sunspot expecting additional C class events.
The position of the target in NOAA 14217 on 15-September-2025 at
15:00 UT is: S14E61 (-814", -294").
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 persists at a low level, only four numbered active regions
are currently viewable on the solar disk. The largest flare in the last 24
hours was a C3.5 from an unnumbered active region in the southeastern
quadrant of the solar disk at 09:27 UT today. While this unnumbered region
continues its transit onto the solar disk, the target region will remain as
NOAA 14216. Further C-class activity is expected over the next 24 hours.
The position of NOAA 14216 on 14-September-2025 at 11:30 UT is
N10E45, (-666", 81")
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)
Dear Collaborators,
Solar activity remains low. The largest flare of the last 24 hours was a
(partially occulted) C1.5 from an unnumbered active region in the
southeastern quadrant at 07:33 UT today. NOAA 14216 has traversed further
onto the disk, but has shown minimal additional activity since the last
message. However, NOAA 14216 will continue as the target region for the
next 24 hours. Additional low C-class activity is expected.
The position of NOAA 14216 on 13-September-2025 at 15:30 UT is
N10E54, (-761", 95")
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)