Dear Collaborators,
Solar activity has diminished since the last message. The largest
event was a C7.9 flare at 14:03 UT yesterday from NOAA 13806
(S12W44, beta-gamma-delta/E-type). Target region NOAA 13807
(S15W91) has now rotated over the South West limb, with some
overlying loops visible above the limb. 13807 remained the most
flare-productive region in the period, being the source of over ten
C-class flares, including three high C-class flares (two C7.8 and
one C7.6). At this time, we are ending the Major Flare Watch but
NOAA 13807 shall remain the target region, as it rotates fully out
of view beyond the South West limb. Additional C-class activity is
expected, with a chance of low M-class flares in the next 24 hours.
The position of NOAA 13807 on 6-Sep-2024 at 11:30 UT is:
S15W91 (918",-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,
De-Chao Song (Purple Mountain Observatory)
Dear Collaborators,
Solar activity has continued at a moderate level since the last message.
NOAA 13807 (S15W79) was the most flare-productive region on disk,
being the source of eight mid-C-class flares and five low-M-class flares
during the period, including the largest magnitude in the period - an M2.8
at 08:47 UT today. The Major Flare Watch shall switch to NOAA13807
before it completely rotates over the west limb. Yesterday's target NOAA
13813 (S23E28) remains classified as a beta-gamma region and produced
two M1 flares and three mid-C-class flares in the period. Please note that
NOAA 13806 (S12W30, beta-gamma-delta/E-type) and 13811 (S11E11,
beta/D-type) each produced an M1.2 flare in the period. Further low-M-
class activity is expected, with a chance of an isolated ≥M5 flare from
various regions in the next 24-48 hours.
The position of NOAA 13807 on 5-Sep-2024 at 11:30 UT is:
S15W79 (902",-266")
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 moderate level. The target region
NOAA 13813 (S22E37) retains its beta-gamma configuration
with a slight increase in both the sunspot area and the number
of spots. The leading portion of this region shows mixed polarities
and has produced five low-M-class flares in the period, the largest
being an M3.3 on 3-Sep-2024 at 15:51 UT. The MM#003 Major
Flare Watch continues with NOAA 13813 as the target, focusing
on its leading spots. Further low-M-class activity is likely, with a
chance of an isolated ≥M5 flare in the next 24-48 hours.
The position of NOAA 13813 on 4-Sep-2024 at 11:30 UT is:
S22E37 (-532",-443")
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 slightly increased since the last message.
The target region has now been designated as NOAA 13813
(S22E51, beta-gamma/D-type). This region produced three
low-M-class flares and one high-C-class flare during the period,
while the largest magnitude flare in the period was an M2.9 on
2-Sep-2024 at 13:33 UT from NOAA 13807 (S16W52, beta-
gamma/E-type). 13807 also produced another two low-M-class
flares and over ten mid-C-class flares in the period. However,
the Major Flare Watch will continue with NOAA 13813 as the
target region for a further 24 hours, due to its prior flaring history.
Further M-class activity is likely, with a chance of an isolated ≥M5
flare in the next 24-48 hours.
The position of NOAA 13813 on 3-Sep-2024 at 11:30 UT is:
S22E51 (-686",-424")
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,
The level of solar activity is moderate. The largest event since the last
message was an M2.0 flare produced by the leading spots of the limb
target region (S20E70). This region also produced an M1.1 flare during
the period. The Major Flare Watch will continue with this South East
limb region. Please note that NOAA 13807 (S16W38, beta-gamma/
E-type) was the source of an M1.5 flare and three mid-C-class flares
in the period. Further C- and low-M-class flares are expected in the
next 24-48 hours, with a chance of >=M5 events.
The approximate position of the target region on 2-Sep-2024 at 11:30 UT is:
S20E70, ( -840", -361" )
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 at a moderate-to-high level. Target region NOAA 13806
maintained spot area but increased in number of spots while losing its
delta-spot configuration to be classified as a beta-gamma/E-type sunspot
group. NOAA 13806 produced high C-class activity, but the region located
beyond the South East limb mentioned in yesterday's message continued to
produce M-class flares - an impulsive M1.4 and a long-duration M5.5 on
1-Sep-2024 at 07:47 UT and 11:41 UT, respectively. At this point we are
initiating a MM#003 Major Flare Watch on this South East limb region.
High C-class flares are expected in the following 24 hours, with a good
chance for more flares >=M5.
The approximate position of this region on 1-Sep-2024 at 18:00 UT is:
S21E90 , ( -895" , -333" )
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)