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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2017 Jan 18 1243 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

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

Protoni solari

Quiet

	10cm flux	Ap
18 Jan 2017	079	016
19 Jan 2017	081	010
20 Jan 2017	082	008

Bulletin

Solar activity is very low, without C-class or even B-class flares reported during last 24 hours. We do not expect any significant change in the solar activity, although the isolated, low C-class flares are still possible. No Earth directed Coronal Mass Ejections have been detected, and the solar protons have remained at background levels in the past 24 hours.

This morning solar wind speed started to increase, and it presently amounts about 530 km/s. Simultaneously with the increase of the solar wind speed, increased the temperature and the interplanetary magnetic field strength (presently amounts about 16 nT), while the density decreased. All this indicates arrival of the fast solar wind. Presently the geomagnetic conditions are quiet to unsettled. The arrival of the fast solar wind is expected to induce disturbed geomagnetic conditions in the coming hours (up to K=5).

Today's estimated international sunspot number (ISN): 034, based on 15 stations.

Solar indices for 17 Jan 2017

Wolf number Catania	///
10cm solar flux	079
AK Chambon La Forêt	008
AK Wingst	004
Estimated Ap	002
Estimated international sunspot number	032 - Based on 30 stations

Noticeable events summary

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

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