Dear Collaborators,
Solar activity has remained at a low level. The target region
NOAA 14465 produced four low-C flares, with the largest
magnitude being a C2.6 at 00:51 UT today. This region has
increased in magnetic complexity to a beta-gamma/D-type,
with its further development. Today, the target should remain
at 14465. Note that a newly-emerged region, NOAA 14466
(beta/B-type, N06W23), also produced three ~C1-C2 flares.
Additional C-class flares are expected in the coming 24 hours.
The position of NOAA 14465 on 10-Jun-2026 at 11:30 UT is:
N09E47 (-684", 143")
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 low level since the last message.
The target region has remained highly productive, producing ten
low-C flares, the largest of which was a C4.5 at 04:16 UT today.
This region has been designated as 14465 and classified as a
beta/D-type sunspot group, displaying separation of its main spots
as well as the emergence of new spots. Today, NOAA 14465 shall
continue to be the target. More C-class flares are expected in the
following 24 hours.
The position of NOAA 14465 on 9-Jun-2026 at 11:30 UT is:
N11E63 (-827", 178")
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 an intermediate level. The largest event
was a C7.2 flare at 02:36 UT today from an unnumbered region
near the northeast limb. This region also produced seven low-C
flares and became the most productive. Today, this limb region
should become the new target. Yesterday’s target, NOAA 14456
has been flare-quiet in this period. Further C-class activity is
expected in the next 24 hours.
The approximate position of the target on 8-Jun-2026 at 11:30 UT is:
N09E84 (-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 returned to a low level since the last message.
The largest event during the period was a C3.3 flare at 04:10 UT
today from the target region NOAA 14456 (N18W41), which also
produced seven low C-class flares in the period. 14456 has developed
into a beta-gamma-delta magnetic configuration and continues to
show significant magnetic flux emergence. Today, the target region
will remain NOAA 14456. Further C-class activity is expected, with
a chance of low M-class activity in the next 24 hours.
The position of NOAA 14456 on 7-Jun-2026 at 11:30 UT is:
N18W41, (591", 292")
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 increased to a moderate level since the last message.
The largest event during the period was an M1.9 flare at 13:40 UT today
from NOAA 14461 (S21E24, beta/C-type), but its sunspot area remains
very small (20 uh). Yesterday's target region, NOAA 14455, produced
only two C-class flares during this period, with the larger being a C4.1.
NOAA 14456 (N18W28, beta-gamma/C-type) produced several C-class
flares in the period, including a C8.8. Today, the target region will
switch
to NOAA 14456, as it is showing significant magnetic flux emergence.
Further C-class activity is expected, with a chance of additional low
M-class activity in the next 24 hours.
The position of NOAA 14456 on 6-Jun-2026 at 11:30 UT is:
N18W28, (423", 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,
De-Chao Song (Purple Mountain Observatory)
Dear Collaborators,
Solar activity has decreased to a low level since the last message.
The largest event during the period was a C2.1 flare at 20:11 UT
on 4-Jun from NOAA 14458 (S05W28). The target region NOAA
14455 (N15W41) produced only one C1.5 flare during the period
and has decreased in complexity to a beta-gamma magnetic
configuration. NOAA 14457 (S09W79, beta/C-type) also produced
four low C-class flares in the period. Today, we will end the Major
Flare Watch campaign and continue to watch NOAA 14455 as the
default target region due to its recent flare history. Further C-class
activity is expected, with a chance of an isolated low M-class flare
in the next 24 hours.
The position of NOAA 14455 on 5-Jun-2026 at 11:30 UT is:
N15W41, (600",247")
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 remained at a high level since the last message.
The largest event during the period was an X1.0 flare
<https://www.lmsal.com/solarsoft/latest_events/#X1.1_AR_4455_N14W15_Fast_Sho…>
at 11:19 UT
on 3-Jun from the target region NOAA 14455 (N14W25). This region
has increased in magnetic complexity to a beta-gamma-delta
configuration, and produced an M7.7 flare and numerous C-class
flares during the period. Today, we will continue the Major Flare
Watch campaign for NOAA 14455 for another 24 hours. Further
C-class flares are expected, with a chance of an isolated >M5 flare
in the next 24 hours.
The position of NOAA 14455 on 4-Jun-2026 at 07:30 UT is:
N14W25, (389", 234")
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 increased to a high level since the last message.
The largest event during the period was an M9.3 flare at 01:22 UT
today, 3-Jun, from the target region NOAA 14455 (N13W07, beta/
C-type; see the SSW Latest Events entry
<https://www.lmsal.com/solarsoft/latest_events/#M9.3_AR_4455_N131W10_Earth_S…>).
This region was also
the source of another M3.3 flare and several C-class flares during
the period. At this time, we are implementing a Major Flare Watch
campaign for NOAA 14455 due to its ongoing flux emergence
around the leading main sunspot. Further C-class activity is
expected, with a chance of an additional isolated >M5 flare in
the coming days.
The position of NOAA 14455 on 3-Jun-2026 at 03:30 UT is:
N13W07, (112",220")
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 increased to a moderate level since the last message.
The largest event during the period was an M1.3 flare at 09:51 UT today
from the target region NOAA 14455 (N15E04, beta/C-type). This region
also produced several C-class flares during the period, including C3.1
and C3.8 events. Continued flux emergence is visible around the leading
main sunspot of NOAA 14455. A southwest limb region near S22E84
produced an M1.2 flare and a few low C-class flares in the period, but
has not yet fully rotated onto the disk. Therefore, today we will continue
to watch NOAA 14455 as the target region. Further C-class activity is
expected, with a chance of additional low-level M-class activity in the
next 24-48 hours.
The position of NOAA 14455 on 2-Jun-2026 at 11:30 UT is:
N15E04, (-63", 254")
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 remained at a low level since the last message.
The largest event during the period was a C1.9 flare at 21:42 UT
yesterday from a limb region (N21E89), which has not yet rotated
onto the disk. NOAA 14446 (S15W42, beta/C-type) and the nearby
region 14449 (S09W37, alpha/H-type) produced most of the other
low C-class flares, but 14449 has decayed significantly, with a rapid
decrease in sunspot area. The target region NOAA 14455 (N15E17,
beta/C-type) produced only a C1.1 flare during the period, but clear
flux emergence is now visible to the north of its leading main sunspot.
Therefore, today we will continue to watch NOAA 14455 as the target
region. Further C-class activity is expected, with a chance of isolated
low-level M-class activity in the next 24 hours.
The position of NOAA 14455 on 1-Jun-2026 at 11:30 UT is:
N15E17, (-268", 255")
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)