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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2016 Sep 12 1251 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
12 Sep 2016	086	012
13 Sep 2016	083	007
14 Sep 2016	081	004

Bulletin

Solar activity was very low in the past 24 hours. No flares, no Earth-directed CMEs were observed. Four active regions are presently observed on the visible side of the solar disc. Solar proton flux intensity is expected to lie within the background levels. Solar activity is expected to be low with some probability for C-class flares.

Solar wind parameters were at nominal values, with wind speed declining slightly from about 375 km/s to 330 km/s. The magnitude of the Interplanetary Magnetic Field (Bt) increased from +5 nT to 13 nT, while Bz increased from -4 nT till +12 nT during this morning (12-Sep-2016) due to the weak influence of a positive polarity coronal hole. The interplanetary magnetic field (IMF) was mostly directed away from the Sun (positive). In the past 24 hours, geomagnetic conditions have been quiet (K Dourbes between 1 and 3; NOAA Kp between 1 and 3). Active to minor geomagnetic storm conditions (K Dourbes = 3-4) are possible from today (12-Sep-2016) due to the increased variations of the solar wind parameters.

Today's estimated international sunspot number (ISN): 057, based on 24 stations.

Solar indices for 11 Sep 2016

Wolf number Catania	///
10cm solar flux	086
AK Chambon La Forêt	///
AK Wingst	004
Estimated Ap	004
Estimated international sunspot number	067 - Based on 26 stations

Noticeable events summary

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

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