Dear Collaborators,
Solar activity is at a moderate level. Target region NOAA 13639 has
grown in sunspot area since the last message and been reclassified
as a beta-gamma/C-type sunspot group (due to reduced levels of limb
foreshortening). NOAA 13634 (a beta/E-type sunspot group) produced
two M-class flares in the period with the largest being an M1.4 on
15-Apr-2024 at 14:01 UT. However, target NOAA 13639 was once again
the most flare-productive region, being the source of five C-class
and four M-class flares, the largest being an M4.0 on 15-Apr-2024
at 19:25 UT. The MM#003 Major Flare Watch will continue with NOAA
13639 as the target. More low M-class flares are probable over the
following 24-hour period, with a chance for a >M5 flare.
The position of NOAA 13639 on 16-Apr-2024 at 15:00 UT is:
N30E40 , ( -534", 537" )
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,
Shaun Bloomfield (Northumbria University)
Dear Collaborators,
The level of solar activity is moderate. Target region NOAA 13637 has
remained stable since the last message, continuing to be classed as a
beta/C-type sunspot group. The North East limb region that was a prior
target for the #MM003 Major flare Watch has now been designated as NOAA
13639 and classed as a beta/C-type sunspot group, although its analysis
before the start of the UT day will be affected by limb foreshortening.
NOAA 13639 was again the most flare-productive region in the period by
generating several C-class flares and three M-class flares, the largest
being an M1.7 on 15-Apr-2024 at 01:06 UT. The overall greatest magnitude
flare was an M2.3 on 15-Apr-2024 at 08:38 UT from NOAA 13634 (a beta/D-
type sunspot group). At this point the MM#003 Major Flare Watch target
switches back to NOAA 13639 due to its greater flaring frequency. More
low M-class flares are probable in the next 24 hours, with a chance for
a >M5 flare.
The position of NOAA 13639 on 15-Apr-2024 at 13:00 UT is:
N29E55 , ( -687", 509" )
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,
Shaun Bloomfield (Northumbria University)
Dear Collaborators,
Solar activity has continued at a moderate level. Most flares
over the past 24 hours came from the vicinity of the target.
These regions have been numbered as NOAA 13637 and
NOAA 13638. 13637 shows a higher magnetic complexity
and has been classified as a beta/C-type sunspot group. It
produced two flares, with the largest one being an M4.3 flare
at 02:24 UT today. 13638 (alpha/H-type) only produced two
low-C flares. Both regions are experiencing the emergence
of new magnetic fluxes. Today the Major Flare Watch region
shall remain with NOAA 13637 and NOAA 13638 (S17E66,
if possible). Further C-class activities are expected with
additional low-M flare probable in the following 24-48 hours.
The position of NOAA 13637 on 14-Apr-2024 at 07:30 UT is:
S11E62 (-830", -138")
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,
Qiao Li (Purple Mountain Observatory)
Dear Collaborators,
Solar activity has decreased to a moderate level. The
southeast region (still unnumbered) near the limb became
the most productive and was a source of multiple flares,
with the largest magnitude being an M2.4 flare at 4:58 UT
today. This region is in proximity to multiple sunspots that
show mixed polarities. Today the Major Flare Watch region
will switch to the southeast limb from the northeast limb.
Yesterday’s target (N30E86) only produced two low-C flares.
Further C-class activities are expected with a chance of a
>M5 flare in the next 24 hours.
The approximate position of the target on 13-Apr-2024 at 15:00 UT is:
S10E89 (-950", -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,
Qiao Li (Purple Mountain Observatory)
Dear Collaborators,
Solar activity has grown to a high level. The largest event since
the last message was a partially occulted M5.5 flare at 16:52 UT
on 11-Apr-2024 from two unnumbered regions behind the east
limb. This event was very eruptive and the two limb regions are
connected by large trans-equatorial loops. At this point, we are
implementing a Major Flare Watch on the limb region in the
northeast quadrant. Please also include the southeast one
(S18E88) if possible. Further C-class activities are expected with
a good chance of another >M5 flare in the next 24 hours.
The approximate position of the target on 12-Apr-2024 at 11:30 UT is:
N17E87 (-950", 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,
Qiao Li (Purple Mountain Observatory)
Dear Collaborators,
The level of solar activity has continued to increase.
NOAA 13629 produced numerous low-C flares before
it completely rotated over the west limb, with the largest
being a C4.0 flare at 11:39 UT on 10-Apr-2024. The
target region NOAA 13634 has shown signs of shearing
and additional flux emergence and has been classified
as a beta/B-type magnetic configuration, with a high and
increasing current helicity. 13634 was also a source of six
low-C flares. NOAA 13635 (N19E41, beta/B-type) to the
west of 13634 and an unnumbered region (S15E88) also
produced several low-C flares. Further C-class activities
are expected with a low-M flare likely in the next 24 hours.
The position of NOAA 13634 on 11-Apr-2024 at 11:30 UT is:
N26E16 (-237", 503")
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,
Qiao Li (Purple Mountain Observatory)
Dear Collaborators,
Solar activity has increased slightly due to five low-C flares
from two active regions. The largest one was a C2.6 flare at
02:11 UT today from the target region NOAA 13634. It also
produced a C1.0 flare, remaining an alpha/A-type sunspot
group. 13634 consolidated its spots and emerged new negative
magnetic fluxes in its southern portion. Its unnumbered nearby
region (N20E63) that also emerged a few spots produced two
high-B flares. Note that NOAA 13629 (N05W87, beta/C-type)
was also a source of three low-C and two high-B flares but it
has nearly rotated beyond the west limb. More low-C activities
are expected in the coming 24-hour period.
The position of NOAA 13634 on 10-Apr-2024 at 08:30 UT is:
N27E36 (-502", 505")
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,
Qiao Li (Purple Mountain Observatory)
Dear Collaborators,
Solar activity has continued at a low level. The largest event
since the last message was a C1.0 flare at 03:34 UT today
from NOAA 13631 (N11W55, alpha/A-type). A plage region
mentioned before has gained its number NOAA 13634 and
has been classified as an alpha/A-type sunspot group. It
produced two high-B flares and was in proximity to a region
near the northeast limb (N20E87). This limb region was a
source of a B9.2 flare. Today the target region shall switch to
NOAA 13634 from NOAA 13633. Interested observers should
include the limb region (N20E87) in their field-of-view as well if
possible. NOAA 13633 was still flare-quiet in the period. More
B-class activities are expected with additional low-C flares
possible in the following 24 hours.
The position of NOAA 13634 on 9-Apr-2024 at 11:30 UT is:
N27E47 (-625", 494")
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,
Qiao Li (Purple Mountain Observatory)
Dear Collaborators,
The level of solar activity has increased due to several ~C1
flares from various regions. NOAA 13632 and NOAA 13630
produced three ~C1 flares but they both showed signs of
decay in their spot area and counts. A plage region (N26E67)
appeared to produce a C1.4 flare at 02:35 UT today. An
unnumbered region near the northeast limb (N19E87) was a
source of a C1.0 and two high-B flares yesterday. The target
region NOAA 13633 has not produced any flares in the past
24 hours, but it has grown in magnetic complexity to be
classified as a beta-delta/D-type sunspot group. 13633 became
the most magnetically complex region on the visible disk, so it
should continue to be the target for a further 24 hours. More
B-class activities are expected with a good chance of additional
low-C flares in the next 24-48 hours.
The position of NOAA 13633 on 8-Apr-2024 at 11:30 UT is:
S08E52 (-749", -70")
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,
Qiao Li (Purple Mountain Observatory)
Dear Collaborators,
Solar activity has dropped to a ~B4 level since the last
message. Only one B6.7 flare was recorded at 21:18 UT
on 6-Apr-2024 from the target region. This region has
been numbered as NOAA 13633, with an alpha/H-type
magnetic configuration. It shows an emergence of negative
magnetic fluxes in its leading portion. 13633 should remain
with the target region. In addition, NOAA 13628 (N07E21,
alpha/H-type) and NOAA 13629 (N05W48, beta/D-type)
have continued to increase in the sunspot area. Continued
B-class activities are expected with additional low-C flares
likely in the coming days.
The position of NOAA 13633 on 7-Apr-2024 at 11:30 UT is:
S09E64 (-852", -104")
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,
Qiao Li (Purple Mountain Observatory)