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Solar Flux 126.0
Flare Max X2.2
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Good evening. Earth facing solar activity remains at low levels with no noteworthy solar flares to report. The farside of the sun is a different story however. Updated coronagraph imagery reveals a halo coronal mass ejection (CME) leaving the other side of the sun beginning at approximately 14:30 UTC (April 25). The source of this event is possibly old region 2322 from the previous rotation. The active region won't return back into view until May 5th or so. This event will have no impact on our geomagnetic field. Stay tuned to SolarHam.com for the latest information.
April 24, 2015 @ 13:20 UTC
Good morning. Below is an updated look at the visible solar disk on Friday (April 24). Solar activity declined to low levels with only minor C-Flares detected from behind the west limb. Activity should continue at quieter levels in the short term with only a small chance for an isolated M-Flare. The coronal mass ejection (CME) observed on Thursday originating from behind the west limb was directed away from Earth. Stay tuned to SolarHam.com for the latest information.
April 23, 2015 @ 14:40 UTC
Solar Update / Flaring Behind West Limb (UPDATED)
Good morning. Below is an updated look at the visible solar disk on Thursday. Solar activity during the past 24 hours reached moderate levels. Sunspot 2322 now located behind the west limb, was responsible for a long duration M1.1 solar flare peaking at 10:07 UTC (Apr 23). The peak strength was likely larger than what the X-Ray sensor detected due to source region being out of direct view. The event was associated with a Type II radio emission with an estimated velocity of 664 km/s. Updated imagery by SDO/AIA using the 193 angstroms channel suggests a coronal mass ejection (CME) is likely. More updates once coronagraph imagery becomes available. Elsewhere, region 2326 reformed towards the northwest limb and is producing C-Class flares. All other regions are fairly stable. There will remain a chance for an isolated M-Flare. Stay tuned to SolarHam.com for the latest data and imagery.
CME Update: Updated coronagraph imagery courtesy of LASCO reveals a coronal mass ejection (CME) following a moderate to strong solar flare early Thursday morning behind the west limb around AR 2322. As expected, the plasma cloud is heading to the west and away from Earth. A noteworthy impact to our geomagnetic field is not expected.
Prepared jointly by the U.S. Dept. of Commerce, NOAA,
Space Weather Prediction Center and the U.S. Air Force.
UPDATED 2015 April 26 0030 UTC
.24 hr Summary...
Solar activity was low this period. A long duration C1 flare was
observed at 25/1849 UTC that was likely associated with a bright surge
on the limb (BSL) near N11 with a max extent of 0.15 solar radii as
noted by a USAF optical observatory. SOHO/LASCO imagery was just
becoming available at the time of this report and early analysis shows
an associated coronal mass ejection (CME) first visible ejecting off the
northwest limb at 25/1836 UTC that appears to be too far west to be
Region 2331 (S09W47, Dai/beta-gamma) exhibited consolidation in its
intermediate and leader spot areas while the remaining four active
regions on the visible disk were generally stable.
An asymmetric full-halo CME was observed in SOHO/LASCO C2 imagery
beginning at 25/1448 UTC however, the lack of activity on the visible
disk in any other observed imagery indicated this event was likely
Two disappearing filaments were observed in GONG H-Alpha imagery earlier
in the period. The first, a 21 degree long filament centered near
S22E19, disappeared between 25/0209-0359 UTC. The second, a 12 degree
long filament centered near S20W32, disappeared between 25/0359-0557
UTC. Both disappearing filaments were non-eruptive and appeared to have
been reabsorbed. No Earth-directed CMEs were observed this period.
Solar activity is expected to be low with a slight chance for M-class
(R1-Minor) flares over the next three days (26-28 Apr).
[Full Report and Forecasts]
[Report of Solar-Geophysical Activity]
A - Alpha (single polarity spot).
B - Beta (bipolar spot configuration).
G - Gamma (atypical mixture of polarities).
BG - Beta-Gamma (mixture of polarities in a dominantly bipolar configuration).
D - Delta (opposite polarity umbrae within single penumbra).
BD - Beta with a Delta configuration.
BGD - Beta-Gamma with a Delta configuration.