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Daily bulletin on solar and geomagnetic activity from the SIDC

Vydáno: 2017 Aug 26 1305 UTC

SIDC Forecast

Sluneční erupce

C-class flares expected, (probability >=50%)

Geomagnetism

Quiet (A<20 and K<4)

Sluneční protony

Quiet

	10cm flux	Ap
26 Aug 2017	081	004
27 Aug 2017	082	003
28 Aug 2017	081	007

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 B3.7 peaked today (26-Aug-2017) at 02:15 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 activity is expected to remain low over the next 24 hours with some probability of C-class flares and a very low probability of M-class flares. The solar wind speed has fluctuated around 350 km/s over the past 24 hours. The total magnetic field strength has fluctuated around 5 nT. The Bz component fluctuated between -2.5 and 3.5 nT. Geomagnetic conditions ranged between Kp index 1-2 (NOAA) and local K index 0-3 (Dourbes) over the past 24 hours. Geomagnetic conditions are expected to be quiet for the next 2 days. Quiet to unsettled conditions can be expected on day three (28-Aug-2017) due to the weak influence of a negative polarity CH HSS.

Today's estimated international sunspot number (ISN): 048, based on 23 stations.

Solar indices for 25 Aug 2017

Wolf number Catania	044
10cm solar flux	081
AK Chambon La Forêt	008
AK Wingst	006
Estimated Ap	004
Estimated international sunspot number	050 - Based on 35 stations

Noticeable events summary

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

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