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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2013 Oct 19 1303 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
19 Oct 2013	138	007
20 Oct 2013	136	007
21 Oct 2013	135	010

Bulletin

Only C-class flares were observed in the past 24h, the strongest was a C8.4 with peak at 15:26 UT on October 18, from NOAA 1861. As this AR (and NOAA 1865) are rotating over the west limb, only C-class flares are expected (but still M-flares remain possible). Geomagnetic conditions have been quiet. There is a coronal hole which influence may reach the Earth in the coming 48h, but it is located probably too much to the north (40 degrees) to become geoeffective.

Today's estimated international sunspot number (ISN): 092, based on 12 stations.

Solar indices for 18 Oct 2013

Wolf number Catania	168
10cm solar flux	140
AK Chambon La Forêt	005
AK Wingst	001
Estimated Ap	002
Estimated international sunspot number	115 - Based on 19 stations

Noticeable events summary

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

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