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)
Dear Collaborators,
Solar activity has continued at a low level in the past 24 hours.
The target region produced the largest event, a C3.3 at 23:54
UT yesterday. This region was numbered as NOAA 14191, as
it rotated completely onto the disk. 14191 exhibited a sunspot
with a well-developed penumbra followed by a small pore, and
was classified as an alpha/H-type magnetic configuration. Today,
the default target should remain with NOAA 14191. More low-C
flares are expected in the following 24 hours.
The position of NOAA 14191 on 21-Aug-2025 at 11:30 UT is:
N10E72 (-889", 128")
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 dropped to a ~C2 level since the last message. The
largest event was a partially occulted C2.9 flare at 09:24 UT today from
an unnumbered region near the northeast limb (N09E89). This region
also produced a C2.3 flare at 09:52 UT today. Its leading portion, which
appears to show a high spot maturity, has already been partially visible.
Today, the target shall switch to this limb region from NOAA 14188.
14188 (Yesterday’s target) has been flare-quiet during this period. Note
that a plage region (N13E26) also produced a C2.5 flare at 02:18 UT
today. Additional C-class flares are expected in the next 24 hours.
The approximate position of the target on 20-Aug-2025 at 11:30 UT is:
N09E89 (-900", 150")
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 eruptive
M1.1 flare at 03:51 UT today from NOAA 14188. This region
has also produced two flares (a C2.2 and a B9.2) since the
last message. It was classified as an alpha/H-type sunspot
group as it transited onto the disk. Today the target shall switch
to NOAA 14188 from NOAA 14180. Yesterday’s target, NOAA
14180, merely produced a C1.2 flare at 03:40 UT today. Further
C-class activity is expected within the coming 24 hours.
The position of NOAA 14188 on 19-Aug-2025 at 11:30 UT is:
S09E65 (-849", -194")
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 stable over the past 24 hours.
The largest event since the last message was a C3.3 flare
at 19:48 UT yesterday from NOAA 14180. This region has
been classified as a beta/C-type magnetic configuration with
the emergence of new negative magnetic fluxes in its leading
portion in the period. Today, NOAA 14180 should become the
new default target. Yesterday’s target NOAA 14172 has almost
rotated out of Earth-view, producing only three ~C1 flares. More
C-class activity is expected in the following 24 hours.
The position of NOAA 14180 on 18-Aug-2025 at 11:30 UT is:
S03W18 (293", -156")
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 slightly decreased since the last message.
The largest event during the period was a C3.6 flare at 04:51
UT today from the target region NOAA 14172 (N08W91), which
also produced over ten additional low C-class flares in the
period. NOAA 14172 shall remain the target region today before
it rotates over the west limb. Further C-class activity is expected
within the next 24 hours.
The position of NOAA 14172 on 17-Aug-2025 at 11:30 UT is:
N08W91 (937",132")
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 remains at a low level. The largest event since the last
message was a C7.7 flare at 21:11 UT yesterday from NOAA 14172
(N09W80), which also produced additional low C-class and high B-class
flares during its approach to the northwest limb. NOAA 14172 is
undergoing significant flux emergence in its trailing portion and will
remain the target region today, with further C-class activity likely and
a slight chance of a low M-class flare within the next 24 hours.
The position of NOAA 14172 on 16-Aug-2025 at 11:30 UT is:
N09W80 (922",128")
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)