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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2016 May 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 May 2016	095	005
24 May 2016	094	005
25 May 2016	093	007

Bulletin

The only solar flare observed during the last 24 hours was a B3.0 event peaking at 08:18UT and produced by NOAA 2546. This active region remains the sole sunspot group currently visible. A small filament eruption was observed on 23 May around 06:30UT (N18E25). No earth-directed coronal mass ejections (CMEs) were observed.

Quiet conditions are expected to continue.

Solar wind speed declined from 600 to 500 km/s. Bz varied mostly between -4 and +4 nT, with the Interplanetary Magnetic Field directed away from the Sun. A small negative coronal hole (CH) on the southern hemisphere is transiting the central meridian. Quiet geomagnetic conditions were observed.

Quiet to unsettled geomagnetic conditions are expected as a result of the gradually waning effects of the CH wind stream.

Today's estimated international sunspot number (ISN): 017, based on 15 stations.

Solar indices for 22 May 2016

Wolf number Catania	///
10cm solar flux	097
AK Chambon La Forêt	011
AK Wingst	009
Estimated Ap	008
Estimated international sunspot number	021 - Based on 23 stations

Noticeable events summary

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

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