Dear Collaborators,
Solar activity has returned to a moderate level. The largest
event since the last message was an M2.8 flare at 19:11 UT
yesterday from NOAA 14204 (alpha/A-type, N03E06). Most
flares including an M1.3 at 14:00 UT yesterday and an M1.2
at 15:51 UT yesterday were produced by the target region
NOAA 14197. 14197 retained a beta-gamma-delta/E-type
sunspot group, although it showed signs of decay in spot
area to 700 μh. Today, the target shall remain at 14197.
Further C-class activity is expected, with additional low-M
flares possible in the following 24 hours.
The position of NOAA 14197 on 31-Aug-2025 at 11:30 UT is:
S18W17 (265", -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,
Qiao Li (Purple Mountain Observatory)
Dear Collaborators,
Solar activity has decreased to an intermediate level since the
last message. The target region, NOAA 14197, has been the
most productive and produced multiple ~C2-C5 flares, including
the largest being a C5.9 flare at 12:38 UT yesterday. This region
has grown in the magnetic complexity to a beta-gamma-delta/E-type
and the spot area to 740 μh. Today, the target shall remain with
14197. Further C-class activity is expected, with a chance for an
isolated M-class flare in the next 24 hours.
The position of NOAA 14197 on 30-Aug-2025 at 11:30 UT is:
S18W04 (63", -405")
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 over the last 24
hours. Yesterday’s target NOAA 14203 (beta/D-type, N12W91)
produced four ~M1 flares, with the largest being an M1.5 flare
at 20:30 UT yesterday, but it has almost rotated beyond the
west limb. NOAA 14197 has become the most active region on
the disk during the period and produced an M1.1 flare at 14:11
UT yesterday. It retains a beta-gamma/E-type sunspot group,
with additional spots emerging. Today, the target shall switch
back to 14197 from 14203. Further C-class activity is expected,
with a chance for another low-M flare in the coming 24 hours.
The position of NOAA 14197 on 29-Aug-2025 at 11:30 UT is:
S17E09 (-142", -388")
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 grown to an intermediate level since the
last message. Several >C5 flares are produced from NOAAs
14204, 14199, 14195, and 14203. 14204 (alpha/H-type, N03E50),
14199 (beta/C-type, N04E38), and NOAA 14195 (alpha/A-type,
S18E07) produced a C9.3 flare (the largest in the period) at
12:27 UT yesterday, a C5.4 at 14:24 UT yesterday, and a
C6.6 flare at 00:06 UT today, respectively. Two ~C5 flares at
00:26 UT and at 11:25 UT today were produced by 14203.
This region has been the most productive and has increased
in magnetic complexity to be classified as a beta/D-type. Today,
the target shall switch to NOAA 14203 from NOAA 14197.
Yesterday's target 14197 (beta-gamma/E-type, S17E23) only
produced three low-C flares. Further C-class activity is expected,
with an isolated low-M flare likely in the following 24 hours.
The position of NOAA 14203 on 27-Aug-2025 at 11:30 UT is:
N12W82 (920", 179")
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 in the last
24 hours. The largest event was an M1.0 at 13:39 UT yesterday
from NOAA 14202 (alpha/H-type, S15E54). To the southwest
of 14202, the target region NOAA 14197 produced three ~C4
flares yesterday. It has increased the spot area to 600 μh and
has been designated as a beta-gamma/E-type, with mixed polarity
in its intermediate portion. Today, 14197 shall continue as the
target. In addition, NOAA 14199 (beta/C-type, N04E52) also
produced four mid-to-high C-class flares, with its largest being
a C7.5 at 23:57 UT yesterday. More C-class flares are expected,
with a chance for another M-class flare in the next 24 hours.
The position of NOAA 14197 on 27-Aug-2025 at 11:30 UT is:
S17E34 (-509", -369")
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 since the last
message. The largest event was an M4.5 at 05:09 UT today
from NOAA 14197. This region has developed a delta configuration
to be classified as a beta-delta/E-type sunspot group, with the
emergence of significant magnetic fluxes. Yesterday’s target
numbered as NOAA 14199 (beta/D-type, N05E63), has also
produced four low-M flares, with its largest magnitude being
an M3.3 flare at 00:22 UT today. Today, the target will switch
back to 14197, due to its high magnetic complexity and dynamic
sunspot behaviour. Further C-class activity is expected, with a
good chance for more M-class flares from these two regions
over the coming days.
The position of NOAA 14197 on 26-Aug-2025 at 11:30 UT is:
N17E48 (-676", -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,
The level of solar activity has increased due to an M4.5 flare at
05:01 UT today from an unnumbered region near the northeast
limb, which was mentioned yesterday. This region subsequently
produced a C9.9 flare while its sunspot group was partially visible
from Earth. Yesterday’s target has been numbered as NOAA 14196
(S11E58, alpha/A-type) and NOAA 14197 (S17E60, beta/D-type).
14197 was the source of an M1.0 at 09:04 UT today and some
C-class flares. Today, the limb region should become the new target,
considering a higher possibility of additional M-class flares occurring
within the following 24-48 hours.
The approximate position of the target on 25-Aug-2025 at 11:30 UT is:
N04E89 (-950", 75")
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 continued at a moderate level since the last
message. The largest event was an M1.9 flare at 19:53 UT
yesterday from the unnumbered region near the southeast limb.
This region mentioned yesterday also produced 14 flares and
has been the most productive during the period. Today, the target
shall switch to this limb region from NOAA 14191. Yesterday’s
target 14191 (alpha/H-type, N10E31) was the source of three
flares, including a C9.1 at 19:01 UT yesterday. Note that a
northeast limb region (unnumbered yet, N04E89) also produced
an M1.3 at 08:26 UT today and two C-class flares. Further C-class
activity is expected with a chance of additional low-M flares from
various regions in the next 24 hours.
The approximate position of the target on 24-Aug-2025 at 11:30 UT is:
S19E79 (-850", -350")
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 grown to a moderate level over the past 24
hours. The largest event was an M1.8 flare at 18:55 UT
yesterday from the target region NOAA 14191. This region
retains an alpha/H-type classification, with the emergence of
additional pores in its intermediate portion. Today, the target
shall continue as 14191. Besides, a limb region (S18E87,
unnumbered yet) also produced a partially occulted M1.7 flare
at 17:56 UT yesterday, accompanied by a CME. More C-class
activity is expected, with another low-M flare likely in the next
24 hours.
The position of NOAA 14191 on 23-Aug-2025 at 11:30 UT is:
N10E45 (-662", 83")
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 low level since the last message.
There were six low-C and high-B flares produced by the target
region NOAA 14191, including the largest magnitude being a
C2.3 flare at 15:46 UT yesterday. 14191 was still classified as
an alpha/H-type sunspot group. However, following 14191, an
unnumbered region, composed of several pores, has also
rotated into view. This region may be the trailing portion of
14191. Additional low-C flares are expected in the coming 24
hours.
The position of NOAA 14191 on 22-Aug-2025 at 11:30 UT is:
N10E59 (-802", 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)