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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2017 May 22 1301 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
22 May 2017	074	006
23 May 2017	072	004
24 May 2017	075	007

Bulletin

Over the past 24 hours solar activity has been low. No flares have been recorded. No Earth directed Coronal Mass Ejections (CMEs) have been detected in coronagraph observations. The greater than 10MeV proton flux remained at background levels over the past 24 hours. Solar activity is expected to remain low over the next 24 hours with a small probability of C-class flares. The solar wind speed measured by DSCOVR has decreased from about 640 to 530 km/s in the past 24 hours. The total magnetic field strength has fluctuated between 4 nT and 6.5 nT. The Bz component has fluctuating between -3 and +3.5 nT. Quiet geomagnetic conditions (K Dourbes between 2 and 3; NOAA Kp=2) were registered in the past 24 hours. Over the next 24 hours geomagnetic conditions are expected to be quiet. Quiet to unsettled conditions are expected on May 23 and May 24.

Today's estimated international sunspot number (ISN): 050, based on 25 stations.

Solar indices for 21 May 2017

Wolf number Catania	///
10cm solar flux	074
AK Chambon La Forêt	014
AK Wingst	010
Estimated Ap	010
Estimated international sunspot number	032 - Based on 27 stations

Noticeable events summary

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

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