Solar activity summary (Last 24 hours)

7 December


Solar activity reached moderate levels today as Region 1909 (S17W54,
Dso/beta) produced an M1/1n flare at 07/0729 UTC. The flare had an
associated 220 sfu tenflare and Type II radio sweep (691 km/s). SDO/AIA
193 imagery showed an apparent release of ejecta beginning at
approximately 07/0718 UTC. We are currently waiting on further imagery
for analysis of the associated coronal mass ejection (CME). Slight
growth was observed in Region 1916 (S13W18, Dac/beta-gamma). A new
region that has been fairly active on the southeast limb was numbered
today as Region 1917 (S16E70, Hsx/alpha). The rest of the spotted
regions were either stable or in decay.

6 December


Solar activity was at low levels for the past 24 hours. Region 1909
(S17W42, Esc/beta) exhibited slight decay in its intermediate spots, yet
increased magnetic complexity and was the most active numbered region on
the visible disk. During the period, this region produced the largest
solar event, a C6 flare, at 05/1743 UTC as well as a C2 flare at 06/0648
UTC. Regions 1915 (S30W42, Dao/beta-gamma) and 1916 (S13W02,
Dao/beta-gamma) showed signs of increased magnetic complexity as well as
an increase in overall size and number of spots. An area of enhanced
plage rotated around the southeast limb and was responsible for
additional C-flare activity, including a C5 flare at 05/1459 UTC. This
flare producing, unnumbered region had yet to show spots on the visible
disk. At approximately 05/2100 UTC, ejecta can be seen on SDO/AIA 304
imagery erupting near S15W35, just north of Region 1909. Analysis will
be accomplished as imagery becomes available to determine if the
associated coronal mass ejection (CME) has an Earthward component and
its potential impacts, if any.

5 December


Solar activity was at low levels, due mainly to significant limb
activity. The largest solar event of the period was a C6 flare observed
at 04/2037 UTC from a region beyond the east limb. This same region was
responsible for a small C1 flare at 04/2222 UTC and a C4 flare right at
the end of the period. Region 1916 (S13E10, Dao/beta) was responsible
for the only other reported C-flare, a C1, that occurred at 05/0643 UTC.
A large 48° filament was observed in SDO/AIA 304 imagery lifting off the
solar disk from 04/1026 UTC to 04/2359 UTC and was centered near N29W21.
Initial analysis indicates an associated coronal mass ejection (CME)
with an approximate speed of 634 km/s has a mainly northward trajectory,
but further analysis will be accomplished to determine if there is an
Earthward component. Region 1909 (S17W26, Dai/beta-gamma) and Region
1916 both exhibited slight growth, mainly in the trailer spots of both.
Region 1909 remained the most magnetically complex region but was also
still void of significant flare activity. The other five numbered
sunspot regions displayed an overall trend of stability or slight decay.

4 December


Solar activity has been at low levels for the past 24 hours. The largest
solar event of the period was a C6 flare observed at 04/0056 UTC from a
region beyond the east limb. Region 1913 (S13W74, Dao/beta) exhibited
slight growth and was responsible for a C4/Sf flare that occurred at
approximately 04/0458 UTC. An associated coronal mass ejection was
observed in Lasco C2 imagery at 04/0536 UTC. Initial analysis indicates
most of the ejecta has a westward trajectory and should have little
impact on Earth. The other five numbered spot regions displayed an
overall trend of stability or slight decay. Region 1909 (S17W15,
Dsc/beta-gamma) continued as the most magnetically complex region but
has yet to produce any significant flare activity. There were no
Earth-directed coronal mass ejections observed in satellite imagery
during the period.

3rd December


Solar activity has been at low levels for the past 24 hours. The largest
event of the period was a C2 flare, observed near the beginning of the
period, at 02/1444 UTC from Region 1913 (S15W62, Cao/beta). Region 1909
(S17W01, Ekc/beta-gamma) was the largest and most magnetically complex
spot group, yet only produced low level B-class flares throughout the
period. The other three numbered spot groups were either stable or
showed signs of decay and were unremarkable. No Earth-directed coronal
mass ejections (CMEs) observed during the period.

2nd December


Solar activity was at low levels due to two C1 flares. The first appears
to have originated from newly numbered Region 1912 (S22E72, Hsx/alpha)
at 01/2202 UTC, prior to rotating on to the visible disk. The second
originated from the other newly numbered region, Region 1913 (S19W55,
Dao/beta), at approximately 1020 UTC. At approximately 01/2030 UTC, a
filament was observed in SOD/AIA 304 imagery departing the area near
N18W42. Preliminary analysis indicates the associated coronal mass
ejection (CME) was projected in a mainly northward direction with an
estimated speed of ~567 km/s. Additional analysis is needed to verify
the trajectory and speed, as well as determine if there is an
Earth-directed component. Most of the other regions on the visible disk
were either stable or showed slight enhancements in either areal
coverage or magnetic complexity, or both.

1st December


Solar activity was at low levels due to an isolated C1 flare at 30/2158
UTC from Region 1909 (S18E26, Dkc/beta-gamma) and one at 01/1121 UTC
from a region yet to rotate around the southeastern limb. While flare
activity remained fairly inactive, the majority of the spot groups
exhibited at least slight growth. Only Region 1907 (S08W42, Hsx/alpha)
showed signs of decay as it progressed towards the western limb. Several
eruptive prominences on the limb (EPL) were observed during the period,
the most notable located near 40N on the west limb at approximately
30/1213 UTC. While several of the EPLs produced associated coronal mass
ejections (CMEs), none appeared to be Earth-directed.

30th November


Solar activity was very low. Region 1909 (S18W26, Dkc/beta-gamma)
remained the largest, most complex region on the visible disk, yet
exhibited very little flare activity. The remainder of the spotted
regions were relatively stable or in slight decay. New Region 1911
(S12E23, Csi/beta) was numbered over night. A large filament was
observed lifting off near the southwest limb from approximately 29/1614
UTC to 29/2129 UTC. The subsequent coronal mass ejection (CME) observed
in Lasco C2 imagery at approximately 29/2236 UTC indicated the majority
of the ejecta had a southward trajectory and should have little impact
at Earth. No Earth-directed CMEs were observed during the period.

29th November


Solar activity was at low levels. Nearly all of the low level C-class
flaring during the period appeared to originate from Region 1908
(S26E21, Dao/beta-gamma). This region has increased in both areal
coverage and magnetic complexity over the past 24 hours. Region 1907
(S09W15, Eac/beta-gamma) was the only other contributor for flare
activity. It produced a C1/Sf flare at 29/1006 UTC. Region 1909
(S18E52, Dkc/beta) showed some penumberal growth as it continued to
rotate further onto the visible disk, yet remained void of significant
flare activity. Regions 1903 (S11W76, Hsx/alpha) and 1910 (N01W17,
Cro/beta) both showed signs of decay. No Earth-directed coronal mass
ejections (CMEs) were observed during the period.

28th November


Solar activity was low due to two long-duration C1.4 flares; the first
at 27/1539 UTC and the second at 28/0041 UTC. The source of the first
flare appeared to be predominantly from behind the west limb. The second
appeared to be associated with activity between Regions 1907 (S08W02,
Dao/beta) and 1908 (S26E34, Dao/beta), though not directly attributed to
either spot group. Coronal dimming, then brightening associated with
reconnection loops was observed in the SDO 193 imagery from
approximately 28/0130 UTC to about 28/0320 UTC. A coronal mass ejection
(CME) associated with this flare activity was observed at 28/0312 UTC in
Lasco C2 imagery. Initial indications are that the CME is directed to
the east, away from the Earth, but further analysis is being conducted
as imagery becomes available. An approximately 38 degree long filament
was observed lifting off the southwest quadrant from approximately
28/0120 UTC to 28/0343 UTC. Analysis will be conducted as imagery
becomes available to determine if there was a CME associated with this
filament.