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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2013 Sep 02 1300 UTC

SIDC Forecast

Brillamenti solari

Active (M-class flares expected, probability >=50%)

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Quiet

	10cm flux	Ap
02 Sep 2013	104	011
03 Sep 2013	104	012
04 Sep 2013	104	015

Bulletin

Solar activity has been eruptive during the past 24 hours, featuring one C1.7 flare from NOAA AR 11834 peaking at 14:20 UT. More C flares from NOAA AR 11834 and 11836 are likely within the next 48 hours, with a slight chance for an M flare. Solar wind speed rose from about 460 to 580 km/s around 6h UT on September 1, possibly due to the effects of the CME of August 30. Solar wind speeds later decreased to about 430 km/s and climbed to a peak of 520 km/s around 3h UT on September 2. Current wind speed lies around 420 km/s. Meanwhile, the Interplanetary Magnetic Field varied between 2 and 6 nT. Solar wind may experience the influence of a small Coronal Hole on September 4. The geomagnetic activity was at quiet levels (K Dourbes between 1 and 3; NOAA Kp between 2 and 3) during the past 24 hours. Quiet conditions (K Dourbes < 4) are expected for September 2 and 3. Quiet to active conditions are possible on September 4, due to the effects of a Coronal Hole high speed stream.

Today's estimated international sunspot number (ISN): 058, based on 11 stations.

Solar indices for 01 Sep 2013

Wolf number Catania	///
10cm solar flux	104
AK Chambon La Forêt	017
AK Wingst	012
Estimated Ap	012
Estimated international sunspot number	052 - Based on 19 stations

Noticeable events summary

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

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