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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2018 Apr 23 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
23 Apr 2018	076	007
24 Apr 2018	076	007
25 Apr 2018	076	010

Bulletin

There are two active regions on the disc, NOAA AR 2706 and 2707. No C-class flares in past 24 h, NOAA AR 2706 has a beta magnetic field configuration and is capable of C-class flaring.

No Earth directed Coronal Mass Ejections (CMEs) have been detected. Solar protons have remained at background levels over the past 24 hours.

The solar wind speed at L1 is at 420 km /s with interplanetary magnetic field magnitude of 5 nT. Geomagnetic conditions are quiet and expected to remain so for the next 48h. The southern extension of the northern polar coronal hole traversed central meridian yesterday, its associated high speed solar wind may arrive to the Earth in 2-3 days.

Today's estimated international sunspot number (ISN): 022, based on 24 stations.

Solar indices for 22 Apr 2018

Wolf number Catania	///
10cm solar flux	076
AK Chambon La Forêt	011
AK Wingst	005
Estimated Ap	005
Estimated international sunspot number	021 - Based on 32 stations

Noticeable events summary

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

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