Dear RHESSI Collaborators,
The level of solar activity remains very low. A new region with spots
has rotated over the North East limb. This region is too close to the
limb to reliably determine a magnetic complexity, but appears to be a
beta region with well-defined, bright EUV loops. B-class activity is
expected.
The approximate position of this region on 18-Feb-2012 at 18:00 UT is:
N15E69, ( -876", 291" )
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 (Trinity College Dublin)
Dear RHESSI Collaborators,
Solar activity is extremely low, with only four small B class flares
produced in the past 24 hours and, most of the active regions in decay.
NOAA 11416 is approaching the west limb and will continue to be today's
target. It still contains the bipolar, reverse polarity sunspot and had
consistently been producing the most, and largest solar flares, however
small.
The position of NOAA 11416 on 17-Feb-2012 14:00 UT is:
S18 W76, ( 896", -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,
Claire Raftery (SSL, UC Berkeley)
Dear RHESSI Collaborators,
Solar activity is low and the background flux level remains at B1. NOAA
11416 and 11417 have produced a number of minor B class flares. The leader
spot of NOAA 11416 now contains two inverted polarity spots within the one
penumbral region and will continue to be today's target. Activity levels
are not expected to increase.
The position of NOAA 11416 on 16-Feb-2012 14:00 UT is:
S19 W63, ( 819", -264" )
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,
Claire Raftery (SSL, UC Berkeley)
Dear RHESSI Collaborators,
Solar activity is low. Many of the current active regions are decaying,
including NOAA 11419 - yesterday's target region. This AR has not produced
any flares in the past 24 hours and now consists of two small sunspots,
surrounded by a large plage region. Today's target will shift back to NOAA
11416. This region, which has been flare quiet since its emergence, has
begun to produce B class flares. In addition, a region of reverse polarity
flux is emerging within the leader spot, increasing the chance of activity.
The position of NOAA 111416 on 15-Feb-2012 14:00 UT is:
S21 W46, ( 654", -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,
Claire Raftery (SSL, UC Berkeley)
Dear RHESSI Collaborators,
Solar activity is at B class level. There are five active regions on disk,
four of which are classified as beta regions and the remaining - NOAA 11420
- an alpha region. Other than a single B5 flare produced by 11418, all
flares continue to be produced by 11419. It has decayed significantly since
its lass disk passage but given that it remains the most flare productive
region, it will continue as today's target.
The position of NOAA 111419 on 14-Feb-2012 14:00 UT is:
N26 E51, ( -679", 488" )
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,
Claire Raftery (SSL, UC Berkeley)
Dear RHESSI Collaborators,
Solar activity levels have fallen slightly, with only one C class flare in
the past 24 hours. This is despite the presence of 5 NOAA active regions on
disk. 11416 is currently listed as the largest and most complex but has not
produced any >B flares since its emergence. 11417 and 11418 are small
regions approaching disk center that are currently close to spotless. NOAA
11419 and 11420 are two regions that have just rotated onto the east limb.
Although it is not possible to characterize their magnetic complexity yet,
11419 has produced a multitude of occulted C class flares over the past two
days and will continue to be today's target. C class flares are expected in
the next 24 hours.
The position of NOAA 11419 on 13-Feb-2012 16:00 UT is:
N28 E60, (-744", 504" )
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,
Claire Raftery (SSL, UC Berkeley)
Dear RHESSI Collaborators,
Solar activity continues at moderate levels.There have been 8 C-class
flares in the past 24 hours, the largest of which was an occulted C9 event.
These were all produced by the still-occulted AR on the east limb. Given
the magnitude of these events while behind the limb, it is extremely likely
that the true magnitudes of the largest flares should be in the M-class
division. This occulted source will continue to be today's target and
activity levels are expected to remain moderate to high, which the chance
of an M flare increasing as the region approaches the limb.
The position of the target of opportunity on 12-Feb-2012 17:30 UT is:
N30 E84, ( -837", 492" )
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,
Claire Raftery (SSL, UC Berkeley)
Dear RHESSI Collaborators,
Solar activity is at a moderate level. NOAA 11417 has rotated onto the east
limb and is the return of former NOAA 11407. Active region 11416 has
undergone a period of rapid growth and is now classified as a beta-gamma
region. However, today's target will be the region about to rotate on the
NE limb. This is former NOAA 11401/11402 which produced multiple large
M-class flares during its last passage. This region has already produced at
least three C class flares, all of which are occulted. Therefore, it is
expected that activity will continue at the C class level and may even rise
to M class levels.
The position of the target of opportunity on 11-Feb-2012 17:30 UT is:
N27 E84 ( -861", 448" )
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,
Claire Raftery (SSL, UC Berkeley)
Dear RHESSI Collaborators,
Solar activity is low today, with the majority of flares, mostly mid-sized
B class flares, being produced by NOAA 11416 in the southern hemisphere. In
addition, a highly occulted C1 event occurred on the west limb (NOAA
11415), along with a small B flare originating from the region rotating
onto the north-eastern limb. Given that NOAA 11416 is still in its growth
phase, and the umbral and penumbral regions are continuing to develop, this
region will remain today's target.
The position of NOAA 11416 on 10-Feb-2012 14:00 UT is:
S16 E16, (-258", -163")
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,
Claire Raftery (SSL, UC Berkeley)
Dear RHESSI Collaborators,
Solar activity has returned to low levels with the rotation of NOAA 11410
off the west limb. NOAA 11415 is a newly numbered region on the west limb
and was the source of two C class solar flares in the past 24 hours.
However, today's target will be an EFR that is emerging in the south
eastern hemisphere. This un-numbered, bipolar region currently consists of
two small sunspots followed by a fragmented, trailing spot. It has been the
source of a series of B and C class events. Further B and C class activity
may continue over the next 24 hours.
The position of the target of opportunity on 9-Feb-2012 16:00 UT is:
S19 E27, ( -418", -222" )
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,
Claire Raftery (SSL, UC Berkeley)