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Daily bulletin on solar and geomagnetic activity from the SIDC

Vydáno: 2017 Mar 29 1246 UTC

SIDC Forecast

Sluneční erupce

Quiet conditions (<50% probability of C-class flares)

Geomagnetism

Active conditions expected (A>=20 or K=4)

Sluneční protony

Quiet

	10cm flux	Ap
29 Mar 2017	084	026
30 Mar 2017	083	012
31 Mar 2017	081	007

Bulletin

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.

Today's estimated international sunspot number (ISN): 047, based on 16 stations.

Solar indices for 28 Mar 2017

Wolf number Catania	///
10cm solar flux	084
AK Chambon La Forêt	025
AK Wingst	024
Estimated Ap	027
Estimated international sunspot number	055 - Based on 35 stations

Noticeable events summary

Provided by the Solar Influences Data analysis Center© - SIDC - Processed by SpaceWeatherLive

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