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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2017 Jan 20 1230 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
20 Jan 2017	080	010
21 Jan 2017	082	010
22 Jan 2017	083	007

Bulletin

There are presently five small sunspot groups visible on the solar disc, as reported by Catania. There were two B-class flares reported this morning, originating from the newly emerged, Catania sunspot group 81 (NOAA AR 2628). We expect solar activity to remain on the low level, with B-class and occasional C-class flares possible. No Earth directed CMEs were observed during last 24 hours. The Earth is still inside the fast solar wind, but the wind speed is slowly decreasing and it presently amounts about 550 km/s. The interplanetary magnetic field magnitude is about 4 nT. Due to the still ongoing influence of the fast solar wind, we can expect unsettled conditions in the coming hours.

Today's estimated international sunspot number (ISN): 055, based on 18 stations.

Solar indices for 19 Jan 2017

Wolf number Catania	071
10cm solar flux	080
AK Chambon La Forêt	016
AK Wingst	009
Estimated Ap	010
Estimated international sunspot number	033 - Based on 22 stations

Noticeable events summary

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

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