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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2017 Aug 27 1230 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 Aug 2017	078	006
28 Aug 2017	077	005
29 Aug 2017	076	008

Bulletin

Over the past 24 hours solar activity has been low. There have been several B-flares flares originated at NOAA AR 2671 (McIntosh: Fai; Mag.Type: Beta-Gamma) and at NOAA AR 2672 (McIntosh: Eai; Mag.Type: Beta- Gamma). The biggest flare B5.4 peaked yestreday (26-Aug-2017) at 21:00 UT. No Earth-directed CMEs have been detected over the past 24 hours. Solar protons have remained at background levels. NOAA AR 2672 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 solar wind speed has fluctuated around 360 km/s over the past 24 hours. The total magnetic field strength has fluctuated around 6 nT. The Bz component varied between -4.1 and 4.4 nT being mainly positive. Geomagnetic conditions ranged between Kp index 1-3 (NOAA) and local K index 1-2 (Dourbes) over the past 24 hours. Geomagnetic conditions are expected to be quiet for the next two days. Quiet to unsettled conditions can be expected on day three due to the weak influence of a negative polarity CH HSS.

Today's estimated international sunspot number (ISN): 033, based on 22 stations.

Solar indices for 26 Aug 2017

Wolf number Catania	///
10cm solar flux	078
AK Chambon La Forêt	010
AK Wingst	005
Estimated Ap	004
Estimated international sunspot number	049 - Based on 32 stations

Noticeable events summary

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

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