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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2017 May 27 1309 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Quiet

	10cm flux	Ap
27 May 2017	080	002
28 May 2017	082	006
29 May 2017	083	007

Bulletin

Over the past 24 hours solar activity has been low. There have been several B-flares flares originated at NOAA AR 2659 (McIntosh: Dai; Mag.Type: Beta). The biggest flare B2.9 peaked yesterday (26-Mar-2017) at 21:23 UT. 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 2659 and one returning active region are expected to produce more B-class flares over the next 24 hours. C class flares are also not excluded. The variations of the solar wind parameters were weak. Solar wind speed remained below 310 km/s during the last 24 hours. The magnitude of the Interplanetary Magnetic Field (Bt) remained below 5 nT. The Bz component fluctuated between between -3 and +3 nT. Geomagnetic conditions have been very quiet in the past 24 hours (K Dourbes between 0 and 2; NOAA Kp between 0 and 2). Geomagnetic activity is expected to continue at very low levels today (27-May-2016). Active conditions are still possible from today midnight due to the possible arrival of the 23-May-2017 CME.

Today's estimated international sunspot number (ISN): 025, based on 24 stations.

Solar indices for 26 May 2017

Wolf number Catania	023
10cm solar flux	080
AK Chambon La Forêt	006
AK Wingst	004
Estimated Ap	003
Estimated international sunspot number	027 - Based on 36 stations

Noticeable events summary

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

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