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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2017 Nov 17 1258 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
17 Nov 2017	075	012
18 Nov 2017	076	010
19 Nov 2017	076	012

Bulletin

Solar flaring activity is low, with only few low B-class flares reported. All reported flares originated from the Catania sunspot group 63 (NOAA AR 2687) which maintains the beta configuration of its photospheric magnetic field. We do not expect significant change of flaring activity in the coming hours. During last 24 hours there were no Earth directed CMEs reported, and the solar protons remained at background level. The solar wind speed presently amounts about 430 km/s (its maximum value within the last 24 hours was about 510 km/s). The interplanetary magnetic field magnitude is stable having the value of about 4 nT. The fast solar wind associated with the equatorial coronal hole which reached central meridian in the early morning of November 16 is expected to arrive at the Earth on November 19. The fast flow associated with the low latitude extension of the southern polar coronal hole (reached central meridian in the late evening of November 13) is expected to arrive at the Earth this evening. The geomagnetic conditions are presently quiet to unsettled, we expect unsettled to active geomagnetic conditions later today due to the arrival of the fast solar wind.

Today's estimated international sunspot number (ISN): 024, based on 22 stations.

Solar indices for 16 Nov 2017

Wolf number Catania	019
10cm solar flux	073
AK Chambon La Forêt	014
AK Wingst	016
Estimated Ap	016
Estimated international sunspot number	017 - Based on 18 stations

Noticeable events summary

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

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