Dear Collaborators,
The largest event since the last message was a long duration B9.7 flare
at 04/17/16:21 UT produced by a south-east limb region (S21E88). This
limb region has been flare quiet since then. The target region NOAA 12816
was the source of five B-class flares (the largest one being a B4.1) during
the period. 12816 retains its beta/C-type configuration but increases in
current helicity significantly (based on the SHARP data). More B-class flares
are expected with a chance of a C-class event in the next 24 hours.
The position of NOAA 12816 on April 18 at 11:30 UT is:
S24E39 (-550", -324")
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 limb region has now been designated as NOAA 12816
with a beta/C-type sunspot group. 12816 has produced three ~B1
flares and also several A-class flares since the last message. Please
note that the largest X-ray event of the period was a B3.4 flare at
04/16/17:57 produced by NOAA 12814. 12814 also produced another
two ~B1 flares and was re-classified as a beta/B-type region. The
newly emerged region near NOAA 12814 was numbered as NOAA
12815 (beta/B-type) and produced a B1 flare. Further B-class activities
are expected with a slight chance of a C-class event in the following
24 hours.
The position of NOAA 12816 on April 17 at 15:30 UT is:
S24E50 (-670", -334")
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,
Yesterday's target NOAA 12814 seems to enter its decay phase.
It was designated as a beta/D-type region with decreasing in its
sunspot area. Today we will watch the south-east limb region
(unnumbered yet) mentioned in the last two messages. This region
appears to emerge some sunspots and continues to produce low
B-class flares (four ~B1 flares in the past 24 hours). There also
emerged a new region (S21W10) near NOAA 12814, which shows
some small pores or sunspots. Further B-class activities are
expected in the next 24 hours.
The approximate position of the target on April 16 at 03:30 UT is:
S23E74 (-850", -350")
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 X-ray event in the past 24 hours was an isolated B1.7 flare
at 04/15/00:02 UT, produced by the limb region (S22E85) mentioned in
the last message. This limb region also produced a few A-class flares.
The target region NOAA 12814 was the source of six high A-class flares.
12814 has been classified as a beta/C-type region with increasing in its
sunspot area and number of spots. It shows some opposite flux emergence
in its leading portion. More B-class activities are expected with a change
of a C-class event in the following 24 hours.
The position of NOAA 12814 on April 15 at 07:30 UT is:
S22W22 (333", -277")
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 X-ray event in the past 24 hours was a B2.7 at 04/13/12:38 UT,
produced by the target region NOAA 12814. 12814 also produced a few A-
class flares during the period. It retains a beta/B-type
classification with slightly
increasing in the sunspot area. We will keep looking at this region today. But
please note that there is another region beyond the south east limb producing
three low B-class flares (B1.3, B1.5 and B2.3) in the past few hours. Additional
B-class flares are expected with a chance of a C-class event in the
next 24 hours.
The position of NOAA 12814 on April 14 at 03:30 UT is:
S22W07 (108", -270")
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 designated as NOAA 12814 with
a beta/B-type configuration. It produced seven B-class flares
(the largest one being a B8.4 at 04/12/19:56 UT) and also a
few A-class flares. This region shows some flux cancellations
in its intermediate portion. Further B-class flares are expected
with a chance of an isolated C-class event in the next 24 hours.
The position of NOAA 12814 on April 13 at 07:30 UT is:
S22E05 (-77", -269")
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,
Solar activity continues at a very low level. The target plage region
was the source of numerous A-class flares in the past 24 hours. It
seems to emerge some sunspots. Low B-class activities are likely
in the next 24 hours.
The approximate position of the target on April 12 at 15:30 UT is:
S22E14 (-220", -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 (Purple Mountain Observatory)
Dear Collaborators,
The level of solar activity remains extremely low. The plage target
region in the South East quadrant has continued to strengthen since
the last message, maintaining several small pores from yesterday and
developing new opposite-polarity pores. Please note that there was a
mistake in the coordinates in yesterday's message (which should have
been S22E40). This region has been the source of A-class activity in
the past 24 hours. No change in flaring activity is expected over the
following 24-hour period.
The approximate position of this region on 11-Apr-2021 at 17:00 UT is:
S22E26 , ( -391", -276" )
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)
Dear Collaborators,
Solar activity remains at an extremely low level. The weak plage target
region in the North East quadrant has decayed since the last message. A
more compact plage region has developed in the South East quadrant over
the past 48 hours and now shows signs of several small pores. This will
become the new target. No change in flaring activity is expected in the
next 24 hours.
The approximate position of this region on 10-Apr-2021 at 16:00 UT is:
S22E20 , ( -305", 271" )
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)
Dear Collaborators,
The level of solar activity remains extremely low. The visible solar disk
continues to be devoid of sunspots, with no flares having occurred in the
past 24 hours. The weak plage target region in the North East quadrant has
remained stable and flare-quiet since the last message. No change in flare
activity is expected in the following 24-hour period.
The approximate position of this region on 9-Apr-2021 at 16:00 UT is:
N15E27 , ( -422", 334" )
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)