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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2014 Oct 04 1234 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
04 Oct 2014	130	009
05 Oct 2014	125	010
06 Oct 2014	121	010

Bulletin

Four low-level C-class flares were recorded. The strongest was a C1.9 peaking at 22:15UT and produced by NOAA 2172 from behind the west limb. The x-ray background flux has decreased below the C1-level. There are currently 8 sunspot groups visible on the solar disk. Most of them are fairly simple, and contain a filament or are close to one. Further C-class flaring is expected. A 20-degrees long, thin, but dynamical s-shaped filament has rounded the southeast limb. This area seems to have been responsible for a filament eruption on 03 October between 03:00 and 04:30UT. The associated CME was not directed to Earth. Solar wind speed increased from about 330 to 370 km/s. Bz was initially fluctuating around 0 nT untill about 05:00UT, when it gradually increased to the current +10 nT. Geomagnetic conditions were quiet to unsettled, and are expected to remain so, with locally an active episode possible.

Today's estimated international sunspot number (ISN): 079, based on 12 stations.

Solar indices for 03 Oct 2014

Wolf number Catania	///
10cm solar flux	137
AK Chambon La Forêt	006
AK Wingst	005
Estimated Ap	004
Estimated international sunspot number	092 - Based on 26 stations

Noticeable events summary

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

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