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)
--
Dear Collaborators,
Solar activity has been at a low level since the last message. The
largest event in the past 24 hours was a C8.7 flare at 10:36 UT
today (12/13) from behind the Southwest limb, from the target
region NOAA 14296. This region has been the main source of flare
activity in the past 24 hours, but now all the sunspots of NOAA
14296 have rotated behind the limb.
NOAA 14307 is a region emerged on 12/10 at the latitude of 12
degrees in the Southern hemisphere. This region consists of small
sunspots with mixed polarity, currently classified as a beta-gamma type.
NOAA 14307 produced 3 low-C class flares in the past 24 hours. Today
we will switch the default target to NOAA 14307, expecting additional
C class events.
The position of the target in NOAA 14307 on 13-December-2025
at 17:30 UT is: S13W15 (260", -213").
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 further reduced to a moderate-to-low level since
the last message. The target region, NOAA 14294 produced an M1.1
flare at 05:27 UT today(12/12) from the Southwestern limb and several
low-C class flares in the past 24 hours. An M2.0 flare was reported
at 04:50 UT today from NOAA 14296 at the area South of its leading
sunspots, in close proximity to the east end of NOAA 14294.
Although NOAA 14294 and its adjacent NOAA 14296 will go behind the
limb soon, they are currently the most flare productive regions.
Today we will end the Major Flare Watch campaign on NOAA 14294, and
observe NOAA 14296 as a default target while it is passing the
Southwestern limb. Low-to-mid C class flares are expected.
The position of the target in NOAA 14296 on 12-December-2025
at 17:00 UT is: S16W78 (917", -274").
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 reduced to a moderate level since the last message.
The target region, NOAA 14294 produced an M4.4 flare at 21:58 UT
yesterday(12/10) from the South of the large trailing spots. NOAA
14294 also produced a C9.5 flare at 15:39 UT today from the area
extended to Northwest. Both events occurred from the peripheral area
rather than on the visible sunspots of NOAA 14294.
NOAA 14294 appears to be in the process of fragmentation, but
maintains flare activity interacting with its peripheral area. Today we
will run the last 24 hours of the Major Flare Watch on NOAA 14294,
on its Northwestern area close to the limb. Additional C to M class
flares are expected, with a slight chance of an event larger than M5.
The position of the target in NOAA 14294 on 11-December-2025
at 17:00 UT is: S13W77 (925", -231").
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 slightly declined from the last message but
continues to be at a high level. The target region, NOAA 14294
produced 4 low-M class and more than 15 C class flares in the past
24 hours, with the largest being an M1.9 at 7:31 UT today(12/10).
NOAA 14294 shows signs of decay, undergoing division of the large
trailing sunspot and fragmentation of the central area with mixed
polarity. However, it maintains total size and flare activity mainly
from its Northwestern region. We will continue the Major Flare Watch
campaign for another 24 hours with this region. Additional M class
flares are expected with the chance of events larger than M5.
The position of the target in NOAA 14294 on 10-December-2025
at 16:30 UT is: S14W66 (865", -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,
Aki Takeda (Montana State University)