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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2016 Dec 14 1244 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
14 Dec 2016	071	006
15 Dec 2016	071	014
16 Dec 2016	072	013

Bulletin

Solar activity is extremely low, with no C-class flares reported since December 10. We expect solar activity to stay at the same level with the low probability for the isolated C-class flares. No Earth directed CMEs were observed in the last 24 hours.

The solar wind speed is slowly decreasing and it presently amounts about 470 km/s. The interplanetary magnetic field magnitude is about 4nT. The fast solar wind associated with the small equatorial coronal hole which reached the central meridian in the morning of December 12 is expected to arrive at the Earth in the midday of December 15. It might be closely followed in arrival time by the fast flow from the small coronal hole (between S08 and S12) which reached the central meridian early on December 13. The geomagnetic conditions are presently quiet. We expect unsettled to active conditions, due to expected arrival of the fast solar wind, starting from midday tomorrow.

Today's estimated international sunspot number (ISN): 023, based on 17 stations.

Solar indices for 13 Dec 2016

Wolf number Catania	014
10cm solar flux	071
AK Chambon La Forêt	007
AK Wingst	005
Estimated Ap	003
Estimated international sunspot number	014 - Based on 13 stations

Noticeable events summary

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

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