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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2017 Apr 17 1230 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

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

Protoni solari

Quiet

	10cm flux	Ap
17 Apr 2017	075	007
18 Apr 2017	078	010
19 Apr 2017	081	014

Bulletin

A C2.0 flare with peak at 02:47 UT was observed from a recurrent active region (NOAA AR 2644) rotating into the visible disk, more C-class flares can be expected and M-class flares are possible (this region produced M-class flares in the previous rotation).

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

Geomagnetic conditions have been at k = 1-2 levels. Solar wind speed is now at 315 km/s with interplanetary magnetic fields of 4 nT. A high speed solar wind from an equatorial coronal hole is expected within 48h. Active to minor storm conditions expected.

Today's estimated international sunspot number (ISN): 000, based on 23 stations.

Solar indices for 16 Apr 2017

Wolf number Catania	///
10cm solar flux	075
AK Chambon La Forêt	006
AK Wingst	004
Estimated Ap	003
Estimated international sunspot number	000 - Based on 30 stations

Noticeable events summary

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

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