Dear Collaborators,
Solar activity has further increased since the last message. The largest
event during the period was a C9.2 flare at 05:22 UT today from NOAA
14207 (N30E17, beta/F-type), which also produced five additional low
C-class flares. Today, the default target shall switch to this region due
to
its ongoing flux emergence. In addition, NOAA 14211 (S14E49, alpha/H-
type), 14199 (N04W58, beta/C-type), and yesterday’s target region NOAA
14197 (S18W72, beta/F-type) produced several more low C-class flares
during the period. Further C-class activity is expected, with a chance of
an isolated M-class flare in the next 24-48 hours.
The position of NOAA 14207 on 4-Sep-2025 at 11:30 UT is:
N30E17 (-241",374")
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)
Dear Collaborators,
Solar activity has slightly increased since the last message. The largest
event during the period was a C6.1 flare at 14:39 UT yesterday from
NOAA 14199 (N04W43, beta/C-type). The target region, NOAA 14197
(S18W59), retains a beta–gamma/E-type configuration but has shown
decreases in sunspot area and number as it rotates toward the west limb.
14197 produced ten C-class flares during the period, including C4.2 and
C4.9 flares yesterday. Today, we will continue to watch this region.
Additional C-class activity is expected in the next 24 hours.
The position of NOAA 14197 on 3-Sep-2025 at 11:30 UT is:
S18W59 (776",-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,
De-Chao Song (Purple Mountain Observatory)
Dear Collaborators,
Solar activity has been low since the last message. The largest event
in the period was a C3.9 flare at 19:14 UT yesterday from the target
region NOAA 14197 (S18W45). This region retains a beta–gamma/E-
type configuration and produced several other low C-class flares during
the period. The default target shall remain with NOAA 14197 today.
Additionally, NOAA ARs 14207 (N30E45; beta/E-type), 14201 (S22W30;
alpha/H-type), 14191 (N11W89; beta/C-type), and 14199 (N04W29;
beta/C-type) were the sources of several C2–C3 flares over the past
24 hours. Additional C-class activity is expected in the next 24 hours.
The position of NOAA 14197 on 2-Sep-2025 at 11:30 UT is:
S18W45 (641",-372")
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)
Dear Collaborators,
Solar activity has decreased to a moderate-to-low level. The largest
event since the last message was a C6.8 flare at 17:58 UT yesterday
from NOAA 14202 (S15W12, alpha/H-type). The target region, NOAA
14197 (S18W31), has decayed to a beta-gamma configuration yet
produced more than ten low C-class flares during the period, the
largest being C4.9 at 03:03 UT today. NOAA 14197 shall remain the
target region, due to its activity history and magnetic complexity. In
addition, a northeast region NOAA 14207 (N30E51, beta/E-type)
produced five low C-class flares in the period. Further C-class activity
is expected, with a chance of an isolated M-class flare in the next 24
hours.
The position of NOAA 14197 on 1-Sep-2025 at 11:30 UT is:
S18W31 (467",-389")
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)
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 ÎĽh. 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 ÎĽh. 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 ÎĽh 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)