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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2017 Jan 22 1259 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Quiet

	10cm flux	Ap
22 Jan 2017	087	010
23 Jan 2017	088	008
24 Jan 2017	086	006

Bulletin

In the last 18 hours solar activity decreased and the last C-class flare was C1.8 flare which peaked at 13:26 UT on January 21. The Catania sunspot group 81 (NOAA AR 2628), which was source of the majority of the flaring in the last 48 hours has presently beta-gamma configuration of its photospheric magnetic field and could be the source of the C-class flares, and possibly but not very probably also source of an isolated M-class flare. No Earth directed CMEs were observed during last 24 hours.

The solar wind speed remains to fluctuate around 500 km/s, and the interplanetary magnetic field magnitude is about 5nT. The geomagnetic conditions are quiet to unsettled and we expect them to remain so in the coming hours.

Today's estimated international sunspot number (ISN): 071, based on 18 stations.

Solar indices for 21 Jan 2017

Wolf number Catania	///
10cm solar flux	086
AK Chambon La Forêt	025
AK Wingst	017
Estimated Ap	015
Estimated international sunspot number	075 - Based on 28 stations

Noticeable events summary

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

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