Dear Collaborators,
Solar activity has increased to a high level since the last message.
The largest event during the period was an M9.3 flare at 01:22 UT
today, 3-Jun, from the target region NOAA 14455 (N13W07, beta/
C-type; see the SSW Latest Events entry
<https://www.lmsal.com/solarsoft/latest_events/#M9.3_AR_4455_N131W10_Earth_S…>).
This region was also
the source of another M3.3 flare and several C-class flares during
the period. At this time, we are implementing a Major Flare Watch
campaign for NOAA 14455 due to its ongoing flux emergence
around the leading main sunspot. Further C-class activity is
expected, with a chance of an additional isolated >M5 flare in
the coming days.
The position of NOAA 14455 on 3-Jun-2026 at 03:30 UT is:
N13W07, (112",220")
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 increased to a moderate level since the last message.
The largest event during the period was an M1.3 flare at 09:51 UT today
from the target region NOAA 14455 (N15E04, beta/C-type). This region
also produced several C-class flares during the period, including C3.1
and C3.8 events. Continued flux emergence is visible around the leading
main sunspot of NOAA 14455. A southwest limb region near S22E84
produced an M1.2 flare and a few low C-class flares in the period, but
has not yet fully rotated onto the disk. Therefore, today we will continue
to watch NOAA 14455 as the target region. Further C-class activity is
expected, with a chance of additional low-level M-class activity in the
next 24-48 hours.
The position of NOAA 14455 on 2-Jun-2026 at 11:30 UT is:
N15E04, (-63", 254")
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 remained at a low level since the last message.
The largest event during the period was a C1.9 flare at 21:42 UT
yesterday from a limb region (N21E89), which has not yet rotated
onto the disk. NOAA 14446 (S15W42, beta/C-type) and the nearby
region 14449 (S09W37, alpha/H-type) produced most of the other
low C-class flares, but 14449 has decayed significantly, with a rapid
decrease in sunspot area. The target region NOAA 14455 (N15E17,
beta/C-type) produced only a C1.1 flare during the period, but clear
flux emergence is now visible to the north of its leading main sunspot.
Therefore, today we will continue to watch NOAA 14455 as the target
region. Further C-class activity is expected, with a chance of isolated
low-level M-class activity in the next 24 hours.
The position of NOAA 14455 on 1-Jun-2026 at 11:30 UT is:
N15E17, (-268", 255")
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)