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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2016 Dec 16 1244 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
16 Dec 2016	073	007
17 Dec 2016	072	010
18 Dec 2016	071	007

Bulletin

The only sunspot visible on the solar disc, NOAA AR 2618 has alpha configuration of its photospheric magnetic field. Accordingly, solar activity is low, with only three B-class flares reported during last 24hours. We expect solar activity to remain on the same low level. No Earth directed CMEs were observed in the last 24 hours.

The solar wind speed is presently about 370 km/s, and the interplanetary magnetic field is 4nT. The low latitude extend of the northern polar coronal hole have reached central meridian in the afternoon of December 15. The associated fast solar wind might arrive at the Earth late on December 18. The geomagnetic conditions are presently quiet. We expect quiet to possibly unsettled conditions, due to possible arrival of the fast solar wind.

Today's estimated international sunspot number (ISN): 000, based on 12 stations.

Solar indices for 15 Dec 2016

Wolf number Catania	012
10cm solar flux	073
AK Chambon La Forêt	005
AK Wingst	002
Estimated Ap	002
Estimated international sunspot number	012 - Based on 21 stations

Noticeable events summary

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

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