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)
Dear Collaborators,
Solar activity remains high since the last message, due to the flares
mainly reported from NOAA 14294. This region produced 7 M class
and more than 10 C class flares in the past 24 hours, with the largest
being an M3.1 flare at 21:13 UT yesterday(12/8). NOAA 14299 in the
Northern hemisphere produced 2 low-M class flares. NOAA 14298,
the current Major Flare Watch target has been flare-quiet since the
X1.1 event yesterday.
NOAA 14294 added new flux in the Northwest of the largest sunspot
(with positive polarity). A train of tiny negative sunspots appeared
and that maintains its complex magnetic configuration of a delta type.
In the next 24 hours, we will continue the Major Flare Watch campaign
with the target switched to NOAA 14294. Additional M-class flares
are expected with the chance of events larger than M5.
The position of the target in NOAA 14294 on 9-December-2025
at 16:30 UT is: S14W51 (744", -237").
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 elevated to a high level since the last
message. An X1.1 flare was reported at 4:49 UT today(12/8) from
NOAA 14298. This region is classified as an alpha-type, but there
was a flux emergence in the Northern vicinity since yesterday.
At this time, we will implement a Major Flare Watch campaign on
NOAA 14298. However, there are other regions that are also worth
paying close attention:
NOAA 14299 produced an M2.5 flare at 23:56 UT yesterday around the
Western spot that produced an M8 event on 12/6. The Eastern portion
of NOAA 14299 also produced an M1.8 flare at 06:40 UT today.
Yesterday's target, NOAA 14294 and its Eastern proximity region,
NOAA 14296 are constantly producing flares of low-C to low-M class
in the past 24 hours, including an M2.1 at 00:33 UT and an M1.1 at
12:42 UT today both from NOAA 14294. These active regions maintain
their large size and high magnetic complexity as a whole.
In the next 24 hours, we will focus on NOAA 14298, the source region
of the X class event today, as the target of the Major Flare Watch
campaign. The position of the target in NOAA 14298 on 8-December-2025
at 17:30 UT is: S14W60 (817", -244").
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 increased to a moderate level since the last
message. Two M class flares were reported in tandem yesterday (12/6)
both from NOAA 14299, which is the region that produced an X flare
on 12/1. While first event, an M1.2 at 18:58 UT was started from the
Eastern (larger) sunspot, an M8.1 at 20:29 UT occured from the
Western (smaller) sunspot with accompanying a filament eruption.
While this region has been in the process of flucturing, the Western
sunspots are losing their penumbra after the M8 event.
The target region, NOAA 14294 has produced 8 C class flares during
the recent 10 hours. The largest event from this region was a C7.5
at 11:51 UT today from the Southeastern portion of its trailing
(the largest) sunspot. An emergence of new flux with an opposite
polarity to the sunspot is observed in this area.
Today we will continue to observe NOAA 14294, but the pointing is
moved to the area of the C7.5 event, expecting additional high-C class
events or larger.
The position of the target in NOAA 14294 on 7-December-2025 at
17:00 UT is: S18W21 (337", -310").
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)
--