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)
Dear Collaborators,
Solar activity continues at a low level. The largest flare produced in the
last 24 hours was a C3.1 from NOAA 14446 at 01:59 UT today. The active
region eastward of the target region continues its transition onto the disk
and appears to show significant flux. The target region, NOAA 14455, has
been relatively quiet since the last message. In general activity across
the disk remains low. As the region beyond the northeastern limb continues
to progress onto the disk, NOAA 14455 will continue as the target region.
Further C-class activity is expected.
The position of NOAA 14455 on 31-May-2026 at 07:30 UT is:
N15E34, (-512", 256")
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 is at a low level. Several flares have been produced since
the last message, the largest being a C4.8 from NOAA 14444 at 11:45 UT
today. NOAA 14455 appears to be fully progressed onto the disk, however a
bright region still remains beyond the northeastern limb, which may produce
further occulted activity. Elsewhere, sunspot activity appears steady
across the disk. Further C-class activity is expected in the next 24 hours.
The position of NOAA 14455 on 30-May-2026 at 11:30 UT is:
N15E44, (-636", 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,
Harry Greatorex (Queen's University Belfast)
Dear Collaborators,
Solar activity persists at a low level. The largest flare of the last 24
hours was an M1.2 from NOAA 14455 at 06:40 UT today. NOAA 14455 is now
classified as a beta type region. This region continues to show a
significant level of flux and there appears to be a further connected
portion yet to transit onto the disk. NOAA 14455 will remain the target
region. Further C-class activity is expected with further chance for
isolated low M-class events.
The position of NOAA 14455 on 29-May-2026 at 11:30 UT is:
N15E58, (-776", 253")
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 at a low level. The target region is now numbered as
NOAA 14455 and produced the largest flare since the last message, which was
a C2.9 at 13:19 UT yesterday. Currently, NOAA 14455 is classified as an
alpha-type region with a sunspot area of ~ 450 μh, however this may change
as the region progresses further into view. NOAA 14455 will continue as the
target region with further C-class activity expected.
The position of NOAA 14455 on 28-May-2026 at 11:30 UT is:
N14E71, (-869", 235")
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 has slightly diminished. The largest flare produced since
the last message was a C4.7 from NOAA 14451 at 23:39 UT yesterday. The
target region continues to produce further occulted flares and appears to
be rotating over the solar limb onto the disk. As of this time, this region
remains unclassified but this may change in the next 24-48 hours. The
target region will remain as the active region at the northeastern limb.
Further C-class activity is expected.
The approximate position of the target region on 27-May-2026 at 11:30 UT is:
N17E84, (-900", 279")
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)