Dear Collaborators,
Solar activity has turned to very low since the last message. The
GOES X-ray flux (long band) background is around the B4 level
for the last several hours.
The trailing region of NOAA 14087 retains sunspots with both
polarities, but they do not share the same penumbra anymore. NOAA
14087 produced several high-B to low-C class flares in the past
24 hours with the largest being a C1.1 flare at 22:37 UT yesterday
(5/16). The region from the Northeast limb has given a number
as NOAA 14089, and is producing a few high-B flares.
At this time, we will discontinue the Major Flare Watch campaign,
but the default target continues to be on NOAA 14087 because of
the better flare history than NOAA 14089 in the past 24 hours.
The position of the target in NOAA 14087 on 17-May-2025 at
15:00 UT is: N17E20 (-323, 314").
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-to-moderate level since the last
message. The target region, NOAA 14087 is showing flare activities
of high-B to low-M class in the past 24 hours, with the largest
being an M2.1 flare at 17:08 UT yesterday (5/15). Another source of
recent flares is the unnumbered region from the Northeast limb
located at the latitude of ~16 degree, repeating several high-B to
low-C class events.
NOAA 14087 maintains its beta-gamma-delta configuration and has
increased both in size and number of sunspots. We will continue the
Major Flare Watch campaign on NOAA 14087 for another 24 hours.
We will continue to observe the delta configuration at the trailing
sunspots expecting another isolated M class flare with a slight chance
of an event larger than M5.
The position of the target in NOAA 14087 on 15-May-2025 at 15:30 UT is:
N17E33 (-505, 313").
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 come down to a low level since the last message.
The target region, NOAA 14087 added one mid-M class flare (M4.7 at
17:59 on 5/14) and after that somewhat has hit a lull only produced
a few low-C class flares. However, the trailing sunspots turned out
to have a delta configuration and thus have high potential of producing
another major flares.
Today we will continue the Major Flare Watch campaign with NOAA
14087 for the next 24 hours. We will continue to observe the area of its
trailing sunspots, expecting additional M class flares or larger.
The position of the target in NOAA 14087 on 15-May-2025 at 15:30 UT is:
N17E47 (-667", 309").
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 due to a chain of major flares from NOAA 14087. The largest
event was an X2.7 flare at 08:04 UT today (5/14) followed by an M7.7
at 11:04 UT. NOAA 14087 produced two more M class and a few C class
flares today. Yesterday's target NOAA 14086, the source region of an
X1.2 flare yesterday, has completed the West limb passage with no
flare reported today.
Today we will continue the Major Flare Watch campaign, with the target
switched to NOAA 14087. This region is still close to the limb to
figure out its magnetic configuration, but the area of trailing sunspots
appear to have mixed polarities and was a source region of the recent
X2.7 and M7.7 events. We will observe the area of trailing sunspots of
NOAA 14087 in the next 24 to 48 hours. Additional M class events or
larger are expected.
The position of the target in NOAA 14087 on 14-May-2025 at 15:30 UT is:
N17E61 (-795", 303").
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,
NOAA 14086 approaching the West limb has produced an X1.2 flare
at 15:25 UT today (5/13). At this time, we will implement the
Major Flare Watch campaign on NOAA 14086. Additional major flare
larger than M5 is expected in the next 24 hours.
The position of NOAA 14086 on 13-May-2025 at 16:00 UT is:
N08W78 (919", 147").
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 very low since the last message, except for
a large scale filament liftoff observed during 20-24 UT yesterday
(5/12) from the Northern central meridian. The largest X-ray event
in the past 24 hours was a C3.8 flare at 13:49 UT today from NOAA
14085. NOAA 14086 approaching the Northwest limb had a new flux
emergence and produced a few low-C class flares.
Yesterday's target from the East limb was given a number NOAA 14087.
This region only produced 2 low-C class flares, but currently has
the largest sunspot area (90 millionths) on the disk with bi-polar
configuration. Today we will continue to observe NOAA 14087, the area
of its preceding (positive polarity) sunspot expecting additional
C class activities.
The position of the target in NOAA 14087 on 13-May-2025 at 15:30 UT is:
N14E69 (-857", 260").
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-to-moderate level since the last
message. The target region NOAA 14079 produced an M1.9 flare at
23:55 UT yesterday (5/11) followed by several low-C class events
today but has completed the West limb passage.
A region rotated from the Northeast limb has been showing vigorous
ejective activities over the limb in EUV 304A images in the recent
24 hours. This region is the source of 3 C class flares so far, with
the largest being a C5.2 at 23:34 UT yesterday. Today we will switch
the target to this region expecting additional C class activities.
The position of the target on 12-May-2025 at 15:00 UT is:
N14E81 (-910", 243").
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 slightly since the last message.
The largest event in the period was a C5.5 flare at 16:16 UT
yesterday from the target region NOAA 14079 (N08W85).
14079 remained the most flare-productive region on the disk,
producing seven additional low C-class flares when it was
rotating over the west limb. Today NOAA 14079 shall remain
the target region. Further C-class activity is expected over
the next 24 hours.
The position of NOAA 14079 on 11-May-2025 at 07:30 UT is:
N08W85 (937",136")
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 declined to a low level since the last message.
The target region NOAA 14079 (beta-gamma/D-type) remained
the most flare-productive region on the disk, producing nine low
C-class flares and the largest magnitude event in the period—a
C3.1 flare at 00:55 UT today. NOAA 14079 shall remain the target
region. Further C-class activity is expected, with a slight chance
of an isolated low M-class flare over the next 24 hours.
The position of NOAA 14079 on 10-May-2025 at 11:30 UT is:
N08W74 (905",146")
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-to-moderate level. The target
region NOAA 14079 (N09W59, beta-gamma/E-type) remained
the most flare-productive region in the period, being the source
of nine C-class flares, including two middle C-class flares (C6.4
and C4.9). Today the target shall remain with this region, although
NOAA 14082 (S10W00) produced the largest event in the period
—a C7.1 flare at 14:54 UT yesterday. Further C-class activity is
expected, with a slight chance of an isolated M-class event in
the next 24-48 hours.
The position of NOAA 14079 on 9-May-2025 at 11:30 UT is:
N09W59 (806",176")
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)