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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2017 Mar 26 1230 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

Minor storm expected (A>=30 or K=5)

Protoni solari

Quiet

	10cm flux	Ap
26 Mar 2017	077	007
27 Mar 2017	077	034
28 Mar 2017	077	024

Bulletin

In the past 24 hours, no C flares were observed. Very low solar activity (no C flares) is expected in the next 24 hours, with a slight chance for a C flare from new beta region NOAA AR 2644. Over the past 24 hours, solar wind speed measured by DSCOVR decreased from about 480 to 390 km/s, while the magnitude of the Interplanetary Magnetic Field (IMF) ranged between about 1 and 4 nT. Quiet geomagnetic conditions (K Dourbes between 0 and 2; NOAA Kp between 0 and 2) were registered in the past 24 hours. Quiet to unsettled geomagnetic conditions (K Dourbes < 4) are expected on March 26. The arrival of a high speed stream from a large, recurrent coronal hole is expected at the end of March 26 or the first half of March 27. Consequently, active to minor storm geomagnetic conditions (K Dourbes = 4 to 5) are possible on March 27 and 28, with a slight chance for moderate geomagnetic storm intervals (K Dourbes = 6).

Today's estimated international sunspot number (ISN): 024, based on 17 stations.

Solar indices for 25 Mar 2017

Wolf number Catania	///
10cm solar flux	074
AK Chambon La Forêt	007
AK Wingst	003
Estimated Ap	003
Estimated international sunspot number	016 - Based on 33 stations

Noticeable events summary

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

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