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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2015 Oct 07 1230 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

Major magstorm expected (A>=50 or K>=6)

Protoni solari

Quiet

	10cm flux	Ap
07 Oct 2015	081	048
08 Oct 2015	083	022
09 Oct 2015	085	053

Bulletin

Solar activity continues to be at the B-class level. C-class flares are possible as new regions rotate over the visible solar disk. There is a geomagnetic storm in progress (Kp reached 6, K at Dourbes went up to 5). The storm is caused by the compression region preceding the expected arrival of a fast speed solar wind stream from a coronal hole. Bz remained negative between 02:00 UT and 08:00 UT with elevated magnitudes of the interplanetary magnetic field (B ~ 20 nT). The solar wind reached 500 km/s. More storm periods can be expected for the next 48 h, as the solar wind speed is going to increase. Another coronal hole has crossed the central meridian today, indicating that the influence of fast speed streams at the Earth will last until next week.

Today's estimated international sunspot number (ISN): 034, based on 07 stations.

Solar indices for 06 Oct 2015

Wolf number Catania	///
10cm solar flux	081
AK Chambon La Forêt	050
AK Wingst	025
Estimated Ap	025
Estimated international sunspot number	025 - Based on 18 stations

Noticeable events summary

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

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