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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2013 Sep 22 1315 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
22 Sep 2013	107	011
23 Sep 2013	107	014
24 Sep 2013	105	007

Bulletin

Solar activity decreased even more, there was not C-class flares reported during last 24 hours. For out of nine numbered sunspot groups on the solar disc have beta configuration of its photospehric magnetic field, therefore the C-class flares are still possible. The solar wind speed is about 420 km/s, and the interplanetary magnetic field magnitude is about 3 nT. The geomagnetic conditions are at the moment quiet. We expect quiet to possibly active geomagnetic conditions in the following 48 hours due to the arrival of a fast flow (associated with the low-latitude coronal hole in the northern hemisphere) and the CME associated with the prominence eruption from September 19.

Today's estimated international sunspot number (ISN): 050, based on 05 stations.

Solar indices for 21 Sep 2013

Wolf number Catania	///
10cm solar flux	110
AK Chambon La Forêt	///
AK Wingst	011
Estimated Ap	010
Estimated international sunspot number	053 - Based on 15 stations

Noticeable events summary

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

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