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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2014 Sep 20 1343 UTC

SIDC Forecast

Brillamenti solari

Eruptive (C-class flares expected, probability >=50%)

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Quiet

	10cm flux	Ap
20 Sep 2014	120	006
21 Sep 2014	124	007
22 Sep 2014	127	007

Bulletin

Solar activity is low. The strongest flare, among three C-class flares reported during last 24 hours was a C3.3 flare (peak time at 18:32 UT) on September 19. The flare originated from the NOAA AR 2171 currently situated at the east solar limb. Solar activity is expected to remain low with occasional C-class flares. The solar wind speed is about 500 km/s. In the wake of the passage of the interaction region between the fast and slow solar wind flow the interplanetary magnetic field magnitude has decreased to low values and it currently amounts about 5nT. The geomagnetic conditions are quiet and expected to remain so in the following 48 hours.

Today's estimated international sunspot number (ISN): 045, based on 11 stations.

Solar indices for 19 Sep 2014

Wolf number Catania	///
10cm solar flux	122
AK Chambon La Forêt	021
AK Wingst	021
Estimated Ap	023
Estimated international sunspot number	059 - Based on 21 stations

Noticeable events summary

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

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