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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2018 May 26 1247 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

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

Protoni solari

Quiet

	10cm flux	Ap
26 May 2018	076	003
27 May 2018	077	005
28 May 2018	076	011

Bulletin

Solar activity was at low levels. The largest flare B3.7 originated at NOAA AR 2711 (McIntosh: Cso; Mag.Type: Beta) peaked yesterday (25-May-2018) at 20:09 UT. NOAA AR 2710 decayed to Halpha plage. 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 class flares. Solar wind parameters returned to the background level. The solar wind speed gradually decreased from 375 km/s till about 320 km/s. The total magnetic field was below 5 nT. The Bz component fluctuated around 0nT between -1 nT and +3 nT. Geomagnetic conditions ranged between Kp index 0-1 (NOAA) and local K index 1-3 (Dourbes) over the past 24 hours. Geomagnetic conditions are expected to be quiet today and tomorrow. Later, from 28-May-2017 most likely unsettled geomagnetic conditions can be expected due to the weak influence from a positive polarity low lattitude extension of the northern coronal hole.

Today's estimated international sunspot number (ISN): 028, based on 18 stations.

Solar indices for 25 May 2018

Wolf number Catania	035
10cm solar flux	076
AK Chambon La Forêt	///
AK Wingst	004
Estimated Ap	003
Estimated international sunspot number	033 - Based on 26 stations

Noticeable events summary

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

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