Dear RHESSI Collaborators,
The Major Flare Watch region NOAA 12673 was the source of
an X2 flare, which is happening right now (peaking at ~9:10 UT).
12673 also produced a few C-class flares as well as an M2.3
yesterday. It retains its beta-gamma-delta/D-type classification,
but still increases in sunspot area and number of sunspots. Its
magnetic inversion line is highly sheared. Additional major flares
are possible in the next few days.
The position of NOAA 12673 on September 6 at 07:30 UT is:
S09W34 (527", -246")
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 (Nanjing University / Montana State University)
Dear RHESSI Collaborators,
Solar activity has been at high levels for the past 24 hours.
The target region NOAA 12673 produced 9 M-class flares
(the largest one being a major M5.5 at 20:28 UT on September 4)
since the last message. Two of them were associated with halo
or Earth-directed CMEs. 12673 has a complex beta-gamma-delta
configuration, increasing in sunspot area (now 680 uh) and number
of spots significantly. It developed rapidly and continues to grow. At
this time we are implementing a Major Flare Watch campaign. Another
major (>M5) event is likely within the next 24 hours.
The position of NOAA 12673 on September 5 at 07:30 UT is:
S08W20 (323", -243")
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 (Nanjing University / Montana State University)
Dear RHESSI Collaborators,
The largest event since the last message was an M1.2 at 05:36 UT on
September 4 produced by NOAA 12673. 12673 also produced three C1
flares. Today we will switch the target to 12673 which has been classified
as a beta-gamma/D-type configuration. Yesterday's target NOAA 12674
(N14E08) has decayed to a beta/F-type region and only produced a B5.9
and a C1.1 events in the past 24 hours. Further C-class activities are
expected from 12674 and 12673, with a chance of another low M-class
event from 12673.
The position of NOAA 12673 on September 4 at 07:30 UT is:
S10W06 (98", -282")
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 (Nanjing University / Montana State University)
Dear RHESSI Collaborators,
The largest event since the last message was a C7.7
at 15:26 UT on September 2 produced by the northwestern
limb region NOAA 12672 (N04W90). This flare was associated
with a non-Earth-directed CME. The target region NOAA 12674
produced a B8.5 as well as a C1.0 flares in the past 24 hours.
12674 retains its beta-gamma/F-type magnetic classification,
increasing in sunspot area (now 810 uh) and number of spots.
Further high B- and low C-class flares are expected with a
chance of an isolated high C-class event.
The position of NOAA 12674 on September 3 at 07:30 UT is:
N14E21 (-332", 120")
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 (Nanjing University / Montana State University)
Dear RHESSI Collaborators,
The largest event in the past 24 hours was a C2.0 at 15:31 UT
on September 1 produced by the target region NOAA 12674.
12674 also produced a C1.2 and a few B-class flares. 12674 has
been designated as a beta-gamma/F-type magnetic configuration,
increasing in number of spots. More B- and C-class activities are
expected in the next 24 hour period.
The position of NOAA 12674 on September 2 at 07:30 UT is:
N13E34 (-519", 116")
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 (Nanjing University / Montana State University)
Dear RHESSI Collaborators,
Solar activity has been at low levels for the past 24 hours.
There are four active regions with sunspots on the visible
disk currently. The most active region, i.e., the target region
NOAA 12674, has a beta/E-type magnetic configuration.
12674 produced two B3.1 events (the largest ones of the
period) on August 31. 12674 continues to show dynamic
surges visible in H-alpha images. B- and C-class activities
are possible in the next 24 hours.
The position of NOAA 12674 on September 1 at 07:30 UT is:
N13E49 (-700", 136")
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 (Nanjing University / Montana State University)
Dear RHESSI Collaborators,
The largest event since the last message was a C5.2
at 18:38 UT on August 30 produced by the target region
NOAA 12674. 12674 was also the source of a C1.3 and
a few high B-class events. 12674 has been designated
as a beta/E-type magnetic classification, increasing in
sunspot area and number of spots. More B- and C-class
flares are expected in the following 24 hours.
The position of NOAA 12674 on August 31 at 07:30 UT is:
N14E60 (-800", 170")
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 (Nanjing University / Montana State University)
Dear RHESSI Collaborators,
Yesterday's target region has been designated as NOAA 12674,
which has a beta/D-type magnetic configuration. 12674 produced
numerous B-class as well as three low C-class flares (the largest
being two C1.3) in the past 24 hours. It appears to be in a growth
phase. Additional B- and C-class activities are expected in the next
24-hour period.
The position of NOAA 12674 on August 30 at 07:30 UT is:
N11E66 (-853", 132")
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 (Nanjing University / Montana State University)
Dear RHESSI Collaborators,
Solar activity has increased since the last message. A new
region (unnumbered yet) near the northeastern limb is rotating
onto the visible disk. It produced numerous high B-class events
as well as three low C-class flares (the largest being a C2.8 at
02:55 UT on August 29) in the past 24 hours. Today we will
switch the target to this new region. Further B- and C-class limb
events are expected in the next 24 hours.
The approximate position of the target on August 29 at 07:30 UT is:
N15E88 (-890", 280")
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 (Nanjing University / Montana State University)
Dear RHESSI Collaborators,
Solar activity has been at a very low level. The largest event
since the last message was a B3.5 at 17:46 UT on August 27
produced by a region beyond the southeastern limb. The target
region NOAA 12671 has been flare quiet. It is almost rotating
over the western limb with overlying loops visible. We will watch
this region for a final 24 hour period. NOAA 12672 (N07W24)
produced a B1.6 at 00:53 UT on August 28 and continues to decay.
Low level activities are expected in the next 24 hours.
The position of NOAA 12671 on August 28 at 07:30 UT is:
N13W91 (924", 213")
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 (Nanjing University / Montana State University)