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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2013 Sep 16 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
16 Sep 2013	091	006
17 Sep 2013	090	015
18 Sep 2013	090	007

Bulletin

There are currently three numbered sunspot groups on the solar disc. Solar activity is very low, with no C-class flares reported since September 06. The Earth is currently inside a slow solar wind flow with the speed of about 350 km/s. The interplanetary magnetic field is stable with the magnitude of about 4 nT. The geomagnetic conditions are quiet and expected to remain so until the arrival of the fast speed stream in the following 24 hours.

Today's estimated international sunspot number (ISN): 017, based on 11 stations.

Solar indices for 15 Sep 2013

Wolf number Catania	///
10cm solar flux	093
AK Chambon La Forêt	005
AK Wingst	002
Estimated Ap	002
Estimated international sunspot number	009 - Based on 14 stations

Noticeable events summary

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

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