Dear Collaborators,
Solar activity has diminished slightly since the last message, with
NOAA 12871 producing only B-level activity. The region has since been
reclassified as a beta-gamma region and shall continue as the default
target. Further B-level activity expected over the next 24 hours, with
chance for an isolated C-class flare.
The position of NOAA 12871 on 27-Sep-2021 at 11:30 UT is:
S28W34, ( 473", -531" )
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,
Ryan Milligan (Queen's University Belfast)
Dear Collaborators,
The target region NOAA 12871 was the source of about ten
B-class flares as well as two C-class flares (C1.0 and C1.7,
with the latter one at 09/25/19:11 UT) in the past 24 hours.
12871 retains its beta/D-type configuration. It shows flux
cancellation and also flux emergence in its northern part.
Further B- and also C-class activities are expected with a light
chance of an isolated low M-class flare in the next 24 hours.
The position of NOAA 12871 on September 26 at 03:30 UT is:
S28W15 (219", -546")
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,
The target region NOAA 12871 produced a few B-class flares
as well as a C1.4 at 09/25/03:27 UT. 12871 has been designated
as a beta/D-type classification. Note that some new sunspots
emerged from the region very close to NOAA 12871, which was
numbered as NOAA 12876 (S22E02, beta/D-type). If possible,
please include these two regions in your field of view. Further B-
and C-class activities are expected with some chance of an
isolated low M-class flare in the next few days.
The position of NOAA 12871 on September 25 at 03:30 UT is:
S28W01 (14", -549")
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,
The target region NOAA 12871 was the source of an M1.8 flare (at
09/23/15:23 UT) and also two C-class (C1.0 and C2.9) and a few
B-class flares in the past 24 hours. 12871 has been designated as
a beta-gamma-delta/D-type region. More B- and C-class activities
are expected with a chance of low M-class flares in the next 24 hours.
The position of NOAA 12871 on September 24 at 07:30 UT is:
S28E07 (-103", -549")
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,
The target region NOAA 12871 is producing an ~M3 flare! It also
produced the only C1.1 flare and numerous B-class flares in the
past 24 hours. 12871 retains its beta-delta/D-type configuration
while decreasing in the sunspot area. There appear another four
regions (NOAA 12872-12875) with sunspots on the visible solar disk,
which also produced a few B-class flares. Further B- and C-class
events are expected with some chance of additional M-class flare
in the next few days.
The position of NOAA 12871 on September 23 at 03:30 UT is:
S28E23 (-330", -542")
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,
The largest event since the last message was a C1.8 flare
at 09/21/11:43 UT produced by NOAA 12873 which had a beta/
D-type magnetic configuration. 12873 also produced another
C1.1 flare and four B-class flares. The target region NOAA 12871
was the source of more than ten B-class flares as well as a C1.1
at 09/21/18:18 UT. 12871 has been designated as a Beta-Delta/
D-type region. Further B- and C-class events are expected with
a chance of a low M-class flare in the next few days.
The position of NOAA 12871 on September 22 at 03:30 UT is:
S27E34 (-477", -518")
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,
The target region NOAA 12871 was the source of numerous
B-class flares (the largest one being a B6.3 at 09/20/10:38 UT)
in the past 24 hours. 12871 retains its beta/D-type configuration
but increases in the sunspot area and number of spots. There
also emerged two regions with sunspots, numbered as NOAA
12872 (N17E40, beta/C-type) and 12873 (N26W09, beta/B-type),
which were relatively flare quiet. More B-class events are expected
with a chance of C-class flares from the target region in the next
24-hour period.
The position of NOAA 12871 on September 21 at 03:30 UT is:
S29E48 (-622", -529")
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,
The target region has been numbered as NOAA 12871 with a
beta/D-type configuration. In the past 24 hours, 12871 produced
numerous low B-class flares as well as a B8.1 at 09/20/09:24 UT.
It shows flux emergence in its north portion. B-class activities are
expected with a chance of C-class flares in the next 24 hours.
The position of NOAA 12871 on September 20 at 07:30 UT is:
S28E57 (-708", -502")
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,
The limb target region was the source of four B-class flares
as well as two C-class flares (a C2.6 at 09/18/08:18 UT and
a C1.6 at 09/19/01:04 UT) in the past 24 hours. This region
has some sunspots now and is supposed to be numbered as
a new region tomorrow. It is still too close to the limb to ascertain
its magnetic configuration. Further B- and C-class activities are
expected in the next 24 hours.
The approximate position of the target region on September 19 at 07:30 UT is:
S32E77 (-800", -530")
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,
The limb target region was the source of three low B-class flares (the
largest one being a B2.0 at 09/18/00:37 UT) in the past 24 hours. This
region is rotating onto the visible solar disk. Currently the visible solar
disk is still void of sunspots. B-class flares are expected and C-class
activities are probable from the limb target region in the next 24 hours.
The approximate position of the limb target on September 18 at 05:00 UT is:
S30E85 (-880", -410")
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)