Dear Collaborators,
Solar activity has decreased since the last message. The largest
event in the period was a C8.3 flare at 10:50 UT today produced
by the target region NOAA 13917 (S07W77, beta-gamma/D-type),
which also produced another several C-class flares. Today, NOAA
13917 shall remain the target region. Additionally, NOAA 13916
(S15W89) and 13924 (S19W23) produced several C-class flares
in the period, including a C7.3 and a C6.0, respectively. Further
C-class activity is expected, with a chance of low M-class flares
in the next few days.
The position of NOAA 13917 on December 15 at 12:30 UT is:
S07W77 (943",-115")
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 continued at a moderate level since the last message.
The largest events in the period were two M1.0 flares, produced by
NOAA 13917 (S08W61) and yesterday's target NOAA 13922 (S18E17),
respectively. 13922 produced another two low C-class flares in the period,
while 13917 was the most flare-productive region on the disk, which
produced another 11 C-class flares in the period. 13917 retains a beta-
gamma-delta configuration. Today, the target region shall switch to NOAA
13917 due to its activity history and magnetic complexity. Further C-class
and additional low M-class flares are expected in the next 24 hours.
The position of NOAA 13917 on December 14 at 08:30 UT is:
S08W61 (845",-128")
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 been at a moderate level. Yesterday's target NOAA
13920 (N22W09) retains a beta-delta/E-type configuration but has
produced only two low C-class flares since the last message. The
most flare-productive region on the disk was NOAA 13922 (S18E29,
beta/C-type), which was the source of three low M-class and four
C-class flares in the period, including the largest one - an M2.2 at
17:31 UT yesterday (12/12). Today the target region shall switch to
NOAA 13922 due to its activity history. Please note that NOAA 13917
(S08W49) has now developed into a beta-gamma-delta configuration
and also produced a low M-class flare (M2.0 at 11:13 UT today) in the
period. Additional low M-class flares are expected in the next 24 hours.
The position of NOAA 13922 on December 13 at 12:30 UT is:
S18E29 (-450",-291")
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 is now at a low C-level. The largest event since the last
message was an M6.7 flare at 15:32 UT yesterday (12/11) produced
by NOAA 13912, which has completely rotated over the west limb.
The target region NOAA 13920 (N22E05) was flare-quiet in the period
but has now developed into a beta-delta/E-type configuration with a
sunspot area of 250 μh. At this time, we are ending the Major Flare
Watch campaign, but NOAA 13920 shall remain the target region due
to its activity history and magnetic complexity. Additionally, several low
C-class flares were produced by NOAA 13922 (S18E43, beta/C-type)
and 13917 (S08W33, beta-gamma/D-type). Further C-class activity is
expected, with a chance of low M-class flares in the next 24 hours.
The position of NOAA 13920 on December 12 at 08:30 UT is:
N22E05 (-79",375")
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 decreased to a high-to-moderate level since the last
message. Yesterday's limb target region has been numbered as NOAA
13922 (S17E52) with a beta/C-type configuration. It produced a low
C-class and two ~M2.0 flares in the period. NOAA 13920 (N22E17,
beta/D-type) was the most flare-productive region on the disk, which
produced fifteen C-class flares and the largest flare in the period - an
M2.7 at 10:03 UT today (12/11). The Major Flare Watch will continue,
with the target region now switching to NOAA 13920. Additionally, NOAA
13917 (S08W21) also produced three C-class flares in the period, with a
beta-gamma/E-type configuration. Further low-M-class activity is expected,
with a chance of an isolated ≥M5 flare from various regions in the next a
few days.
The position of NOAA 13920 on December 11 at 12:30 UT is:
N22E17 (-265",373")
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 remains at a high level. The largest event since the last
message was an M6.4 flare at 06:36 UT today (12/10), produced by
a southeast limb region (S17E73), which also produced another three
~M1.0 and five C-class flares in the period. The Major Flare Watch
will continue, and the target region will switch to this limb region.
Yesterday's target region NOAA 13912 (S06W82) remained active
and produced more than ten C-class flares when rotating over the
west limb. Further low-M-class activity is expected, with a chance of
an isolated ≥M5 flare from various regions in the next a few days.
The approximate position of the target on December 10 at 12:30 UT is:
S17E73 (-892'',-283'')
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 is now at a high level. The largest event since the last
message was an X2.3 flare at 08:50 UT yesterday (12/08), produced
by NOAA 13912 (S06W66). At this time, we are implementing the
Major Flare Watch campaign on this region. 13912 also produced
an M1.5 plus six C-class flares in the period but has been downgraded
to a beta/D-type magnetic configuration. Yesterday's target NOAA
13917 (S07E06) produced five low-to-mid C-class flares in the period
and was also downgraded to a beta/D-type magnetic configuration.
Further C- and low M-class activities are expected, with a chance of
major flares (>M5) in the coming days.
The position of NOAA 13912 on December 9 at 08:30 UT is:
S06W66 (886",-100")
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 been at a moderate level. The target
region NOAA 13917 produced two low M-class flares,
an M2.3 at 13:00 UT and an M3.2 at 21:53 UT yesterday,
and also seven C-class flares. It has been designated
as a beta-delta/D-type region, with increasing the sunspot
area and number of spots. Also note that NOAA 13912
(S07W50, beta-gamma/D-type) was the source of five
C-class flares. Additional low M-class flares are expected
in the next 24 hours.
The position of NOAA 13917 on December 8 at 04:30 UT is:
S07E21 (-347", -118")
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 was at a moderate-to-low level over the past
24 hours. The largest event of the period was an M1.5 flare
at 09:06 UT yesterday produced by the target region NOAA 13917.
13917 also produced nine C-class flares. It retains a beta-
gamma/D-type configuration but increases the sunspot area
and number of spots. Also note that another region NOAA 13912
(S06W35, beta/C-type) produced seven C-class flares including
a C8.6 at 08:50 UT today. Further C-class activities are expected
with some chance of low M-class flare in the next 24 hours.
The position of NOAA 13917 on December 7 at 08:30 UT is:
S08E32 (-512", -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,
Ying Li (Purple Mountain Observatory)
Dear Collaborators,
Solar activity has been at a moderate-to-low level since
the last message. The largest event of the period was an
M2.5 flare at 10:32 UT yesterday produced by NOAA 13906,
which has been rotated over the west limb. 13906 was also
the source of six low C-class flares yesterday. The target
region NOAA 13917 has been designated as a beta-gamma/
D-type configuration and produced six C-class flares during
the period. Also note that a nearby region NOAA 13916 (S16E37)
produced a C8.0 flare at 06:42 UT today and was also designated
as a beta-gamma/D-type configuration. Further C-class activities
are expected with low M-class flares probable in the next 24 hours.
The position of NOAA 13917 on December 6 at 08:30 UT is:
S08E46 (-695", -137")
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)