SIDC Ursigram

3-day Forecast of Solar and Geomagnetic Activity: Latest Issue and Archive

INFO FROM SIDC - RWC BELGIUM 2017 Mar 29 12:28:46

Over the past 24 hours solar activity has returned to B-class eruptive
level. There have been seven B-flares flares originated at NOAA AR 2645
(McIntosh:Dai; Mag.Type:Betta-Gamma).The biggest flare B4.5 peaked today
(29-Mar-2017) at 01.40 UT originated at NOAA AR 2646 (McIntosh:Axx;
Mag.Type:Alpha) which is about to rotate over the east limb. No
Earth-directed CMEs have been detected over the past 24 hours. Solar
protons have remained at background levels over the past 24 hours. Solar
X-Ray background level is expected to remain low. NOAA AR 2645 is expected
to produce more B-class flares over the next 24 hours. C-class flares are
also not excluded.Over the past 24 hours, solar wind speed measured by
DSCOVR remained stable with the average value around 700 km/s till 06:00 UT
today (29-Mar-2017). Then the speed dropped abruptly till 630 km/s.
WSA-ENLIL model indicates the Earth is out of influence of the high speed
stream. Interplanetary Magnetic Field (IMF) remained stable with the value
around 4 nT. Bz variations remained at low level (varying mostly between -4
nT and +4nT). The geomagnetic field stayed at active conditions level  (K
Dourbes between 2 and 4; NOAA Kp between 3 and 4). Active to unsettled
geomagnetic conditions (K Dourbes < = 4) are expected today and tomorrow.

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