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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2018 May 25 1329 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Quiet

	10cm flux	Ap
25 May 2018	074	003
26 May 2018	075	005
27 May 2018	074	007

Bulletin

Solar activity was at low levels. The largest flare B9.8 originated at NOAA AR 2710 (McIntosh: Axx; Mag.Type: Alpha) peaked yesterday (24-May-2018) at 12:30 UT. No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal levels. Solar activity is expected to be at low levels with some probability for C flares and minor chance for M flares. Solar wind parameters returned to the background fluctuations level. The solar wind speed gradually decreased from 500 km/s till about 380 km/s. The total magnetic field was below 5 nT. The Bz component fluctuated around 0nT between -2.5 and +2.5 nT. Geomagnetic conditions ranged between Kp index 0-2 (NOAA) and local K index 0-2 (Dourbes) over the past 24 hours. Geomagnetic conditions are expected to be quiet.

Today's estimated international sunspot number (ISN): 033, based on 20 stations.

Solar indices for 24 May 2018

Wolf number Catania	047
10cm solar flux	074
AK Chambon La Forêt	008
AK Wingst	004
Estimated Ap	003
Estimated international sunspot number	035 - Based on 27 stations

Noticeable events summary

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

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