Dear Collaborators,
Solar activity has been low since the last message. The largest event
in the past 24 hours was a C8.6 flare at 22:21 UT yesterday (12/22)
produced by the target region, NOAA 14317, which also produced 3
low-C class flares during the period. All these events were started
from the South side of its following (negative polarity) sunspot.
Today, we will continue to observe NOAA 14317, but the target area
will shift eastward to the following sunspot, expecting additional
C class events.
The position of the target in NOAA 14317 on 23-December-2025
at 17:00 UT is: N10E41 (-637", 197").
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,
Aki Takeda (Montana State University)
--
Dear Collaborators,
Solar activity had increased slightly since the last message, but has
returned to a low level for the recent several hours. The main source
of activity was NOAA 14316, which produced an M1.3 flare at 18:12
UT yesterday (12/21) and more than 10 low-to-mid C class flares.
This region underwent new flux emergence at in the West vicinity of
leading sunspot but appears to hit lull now.
Yesterday's target, NOAA 14317 had been flare-quiet during a series
of flares by NOAA 14316, but started to produce a few low-C class
flares today from the Eastern side of the main leading sunspot. It is
also notable that a new sunspot pair has emerged in the Southeast
of this leading sunspot. Today we will continue to observe NOAA 14317
at the Eastern side of the leading sunspot, expecting additional
C class events.
The position of the target in NOAA 14317 on 22-December-2025
at 17:00 UT is: N10E50 (-737", 204").
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,
Aki Takeda (Montana State University)
--
Dear Collaborators,
Solar activity has been at a low level since the last message.
The largest event of the period was a C3.2 flare at 19:58 UT
yesterday, produced by NOAA 14317 which just rotated onto
the visible disk. 14317 also produced five C1-C2 flares. It was
designated as a beta/D-type configuration and has the largest
sunspot area. Today the target will switch to this region. Yesterday's
target NOAA 14312 only produced a C2.7 flare and retains an
alpha/H-type configuration. Further C-class activities are expected
in the next 24 hours.
The approximate position of NOAA 14317 on December 21 at 08:00 UT is:
N13E69 (-930", 200")
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,
Ying Li (Purple Mountain Observatory)
Dear Collaborators,
Solar activity has increased since the last message. The target
region NOAA 14312 produced an M1.1 flare at 07:36 UT today
plus two low B-class flares. It retains an Alpha/H-type configuration.
Please note that NOAA 14307 (S15W90) also produced an M1.0
flare yesterday when it was rotating beyond the west limb. Today
we continue to watch NOAA 14312, with C-class activities expected
and some chance of additional low M-class flare in the next 24 hours.
The approximate position of NOAA 14312 on December 20 at 09:00 UT is:
N19E46 (-700", 360")
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,
Ying Li (Purple Mountain Observatory)
Dear Collaborators,
Solar activity remains at a very low level. The largest event
over the past 24 hours was a C1.9 flare at 05:34 UT today
from NOAA 14307 (S14W89). 14307 was also the source of
another two ~C1 flares plus two high B-class flares. This region
is rotating over the west limb. The limb target region has been
designated as NOAA 14312 with an Alpha/H-type configuration.
It only produced a B9.4 flare during the period. Today we continue
to watch this region as it still has the highest current helicity
compared with the other regions on the visible disk. C-class
activities are expected in the following 24 hours.
The approximate position of NOAA 14312 on December 19 at 10:00 UT is:
N18E55 (-750", 320")
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,
Ying Li (Purple Mountain Observatory)
Dear Collaborators,
Solar activity remains at a low level. The largest event since
the last message was a C3.2 flare at 07:44 UT today produced
by the limb target region (unnumbered yet). This region also
produced a C2.0 flare plus two high B-class flares. Its current
helicity continues increasing when it is rotating onto the visible
disk. Further C-class activities are expected in the next 24-hour
period.
The approximate position of the target on December 18 at 09:30 UT is:
N20E73 (-875", 330")
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,
Ying Li (Purple Mountain Observatory)
Dear Collaborators,
Solar activity continues at a very low level. Yesterday's target
NOAA 14307 (S15W67) only produced two ~C1 flares (C1.4
and C1.0) during the period. It retains a beta/D-type configuration
but begins to decrease in the sunspot area and number of spots.
Today the target will switch to a northeast limb region which
produced three C-class flares including the largest one, a C1.9
at 13:47 UT yesterday. Additional C-class activities are expected
in the next 24 hours.
The approximate position of the target on December 17 at 12:30 UT is:
N19E88 (-920", 300")
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,
Ying Li (Purple Mountain Observatory)
Dear Collaborators,
Solar activity continues at a low level. The largest event
over the past 24 hours was a C4.0 flare at 17:20 UT yesterday
produced by NOAA 14304 (N25W89) that has rotated over the
west limb. The target region NOAA 14307 produced a C1.3 flare
plus three high B-class flares during the period. 14307 retains
a beta/D-type configuration with increasing the sunspot area.
Today we will continue to watch this region. C-class activity is
expected in the following 24 hours.
The position of NOAA 14307 on December 16 at 08:30 UT is:
S15W53 (753", -242")
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,
Ying Li (Purple Mountain Observatory)
Dear Collaborators,
Solar activity continues at a low level. The largest event since the
last message was a C2.3 flare at 16:55 UT yesterday produced
by the target region NOAA 14307. 14307 also produced another
three ~C1 flares and four high B-class flares during the period. It
retains a beta/D-type configuration but increases in the sunspot
area and number of spots. Additional C-class flares are expected
in the next 24 hours.
The position of NOAA 14307 on December 15 at 08:30 UT is:
S13W39 (599", -207")
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,
Ying Li (Purple Mountain Observatory)
Dear Collaborators,
Solar activity remains at a low level since the last message. The
largest event in the past 24 hours was a C3.8 flare at 07:24 UT today
(12/14) from NOAA 14296 rotated behind the Southwest limb. NOAA
14304 approaching the Northwest limb produced 5 low-C class flares
but will undergo limb passage today.
Yesterday's target, NOAA 14307, has been flare-quiet during the past
40 hours. However in the recent 24 hours, this region grew in size
and added new spots in its Northern vicinity. Today we will continue
to observe NOAA 14307, expecting C class events.
The position of the target in NOAA 14307 on 14-December-2025
at 16:00 UT is: S14W29 (460", -224").
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,
Aki Takeda (Montana State University)
--