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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2013 Mar 18 1159 UTC

SIDC Forecast

Brillamenti solari

Quiet conditions (<50% probability of C-class flares)

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Proton event expected (10 pfu at >10 MeV)

	10cm flux	Ap
18 Mar 2013	126	016
19 Mar 2013	123	006
20 Mar 2013	123	004

Bulletin

Solar activity is eruptive with 6 C-flares in the past 12 hours. Four C-flares originated from NOAA AR1698 and two C-flares came from an unnumbered region near AR1700. Solar activity is expected to remain eruptive for the next 24 hours, mainly caused by AR1698. C-flares are very likely, but there is also a slight chance for an M-flare. AR1698 is approaching the west limb, so if it erupts a proton event is possible. The solar wind is getting stable again; in the past 24 hours the speed has decreased from 750 km/s to about 500 km/s. The interplanetary magnetic field has returned to about 10nT, with a positive Bz-component. Geomagnetic conditions are expected to be quiet for the next 48 hours.

Today's estimated international sunspot number (ISN): 069, based on 08 stations.

Solar indices for 17 Mar 2013

Wolf number Catania	///
10cm solar flux	126
AK Chambon La Forêt	079
AK Wingst	056
Estimated Ap	059
Estimated international sunspot number	080 - Based on 17 stations

Noticeable events summary

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

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