Dear Collaborators,
Solar activity has been at a moderate-to-low level since the last
message. Yesterday's target region rotated from the Southeast limb
was designated as NOAA 14446. This region has produced more than 10
low-to-mid C class flares in the last 24 hours, with the largest
being a C5.6 flare at 21:57 UT yesterday(5/23). Currently at least 3
sunspots with the leading(negative) polarity are visible from the
Earth, which appear to be the leading portion of a larger region.
A series of flares were produced from the Northeastern area of the
currently visible sunspots of NOAA 14446, but this area has somewhat
calmed down in the recent 12 hours. The latest flares in these several
hours are 2 low-C class events from NOAA 14441 approaching the West
limb.
Today we will continue to observe NOAA 14446, but the target is
shifted to the Northeast area of this region, because of the flare
history since yesterday.
The position of the target on 24-May-2026 at 16:00 UT is:
S07E72 (-894", -110").
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 declined to a low-to-moderate level since the last
message. The main source of flare activity has been an unnumbered
region rotated from the Southeast limb. This region produced 10 low-C
class flares in the past 24 hours, with the largest being a C3.6 flare
at 5:35 UT today(5/23). The target region, NOAA 14441 also contributed
to this C3.6 event, but no other flare activity was reported.
Today we will switch the target to this unnumbered region from the
Southeast limb. Currently only one moderate-sized sunspot is visible
from us close to the limb, and the flares are coming from further
close to the limb. We will therefore observe the East side of the
currently visible sunspot, expecting additional C-class events.
The position of the target on 23-May-2026 at 15:00 UT is:
S14E79 (-903", -225").
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 during the last 24 hours was elevated to a moderate
level due to the flares from behind the Northwestern limb produced
by NOAA 14436. This region produced more than 10 flares larger than
high-B class, with the largest being an M2.4 flare at 10:03 UT
today(5/22). The loop system over NOAA 14436 will be fully out of our
view in the next 24 hours.
Yesterday's target, NOAA 14441 added new sunspots in the Northeast
vicinity of the leading sunspots, now being classified as a beta-gamma
type. Today we will continue to observe NOAA 14441 in the area of
the new flux emergence, the source of a C1.5 flare today at 12:55 UT.
The position of the target in NOAA 14441 on 22-May-2026
at 15:30 UT is: N09W53 (749", 180").
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. The largest
event in the last 24 hours was a C5.6 flare at 13:09 UT today(5/21)
from the target region, NOAA 14436, which has now rotated behind
the Northwest limb.
NOAA 14441 in the Northwestern quadrant continued to grow both in
size and number of sunspots since yesterday, having produced 2
high-B class flares from the area of trailing sunspots with mixed polarity.
Today our target will move to NOAA 14441, expecting high-B to low-C
activities.
The position of the target in NOAA 14441 on 21-May-2026
at 15:30 UT is: N08W36 (553", 160").
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 continues to be at a low level since the last message.
The largest event in the last 24 hours was a C2.1 flare at 19:44 UT
yesterday(5/19) from the target region, NOAA 14436. This region
underwent a new flux emergence in the Southeast portion of the main
sunspot, which resulted in several more low-C class flares yesterday.
NOAA 14441 located in the Northwest quadrant is showing stable
growth by adding new sunspots, but currently having produced only
one B-class flare.
Today we will continue to observe the Southeast portion of NOAA 14436,
expecting additional low-C class flares before reaching at the limb.
The position of the target in NOAA 14436 on 20-May-2026
at 15:30 UT is: N17W71 (855", 297").
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 level since the last message.
The largest event in the last 24 hours was a C2.1 flare at 7:29 UT
today(5/19) from the plage in the north part of NOAA 14436.
NOAA 14436 also produced a C1.9 flare (at 18:10 on 5/18) and
several high-B class flares from the southeast side of the main
sunspot. A bright region from the Northeast limb is coming into
our view, but currently not showing flare activity. Today we will
continue to observe NOAA 14436, on the Southeast side of the
main sunspot.
The position of the target in NOAA 14436 on 19-May-2026
at 15:30 UT is: N17W57 (764", 310").
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 declined to a low level since the last message.
The largest event in the last 24 hours was a C9.7 flare at 20:42 UT
yesterday (5/17) produced by NOAA 14436. This region also produced
5 high-B class flares, while yesterday's target, NOAA 14432 rotated
behind the limb without showing further flare activity. Today our default
target will be switched to NOAA 14436, on the East side of the main
sunspot.
The position of the target on 18-May-2026 at 15:00 UT is:
N18W43 (626", 320").
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 reached a moderate level. Four low-M flares
were produced by NOAA 14436 and the target region NOAA
14435. 14436 (N19W33) produced an M1.9 flare and an M1.3
flare yesterday, which has decreased in magnetic complexity
to alpha/H-type. 14435 has retained its highest productivity,
producing an M2.0 at 17:39 UT yesterday and an M1.4 at
03:29 UT today. Today, the target will remain with the looptops
of NOAA 14435 for the final 24 hours. Further C-class activity
is expected, with a low-M flare likely in the next 24 hours.
The position of NOAA 14435 on 17-May-2026 at 11:30 UT is:
N22W91 (878", 354")
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 an intermediate level. The
target region NOAA 14435 produced four flares, including
the largest being a C9.5 at 16:05 UT yesterday. This region
has been classified as a beta-gamma/D-type sunspot group,
though it is nearing the west limb. Today, the target will
remain with NOAA 14435 for a further 24 hours. Additional
low-C activity is possible in the coming 24 hours.
The position of NOAA 14435 on 16-May-2026 at 11:30 UT is:
N22W88 (878", 356")
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 remained at an intermediate level. The
largest event since the last message was a C6.7 flare at
13:10 UT today from the target region NOAA 14435. This
region has retained its high productivity and has developed
into a beta-gamma/D-type sunspot group. Today the target
shall remain at 14435. Note that NOAA 14438 (N20W51,
beta/D-type) also produced six low-C flares. Further C-class
activity is expected in the next 24 hours.
The position of NOAA 14435 on 15-May-2026 at 11:30 UT is:
N22W73 (842", 367")
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)