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Daily bulletin on solar and geomagnetic activity from the SIDC

Существующий: 2013 Jul 22 1315 UTC

SIDC Forecast

Солнечные вспышки

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

Geomagnetism

Quiet (A<20 and K<4)

Солнечные протоны

Quiet

	10cm flux	Ap
22 Jul 2013	120	004
23 Jul 2013	122	003
24 Jul 2013	125	005

Bulletin

Three sunspot groups were reported by Catania today, with numbers 33, 35 and 34 (corresponding to NOAA ARs 1793, 1800 and NOAA H-alpha plage 1799 respectively). No C-class flares were reported during the last 24 hours, but C-flares remain probable in Catania sunspot groups 33 and 35, with a weak chance for an M-class flare. An equatorial coronal hole reached the solar central meridian today. The fast solar wind stream from this coronal hole is expected to arrive at the Earth on July 25. The Earth is currently inside a slow (around 400 km/s) solar wind flow with weak to average (around 3-4 nT) interplanetary magnetic field magnitude. We expect quiet geomagnetic conditions in the coming hours.

Today's estimated international sunspot number (ISN): 037, based on 13 stations.

Solar indices for 21 Jul 2013

Wolf number Catania	///
10cm solar flux	109
AK Chambon La Forêt	011
AK Wingst	006
Estimated Ap	005
Estimated international sunspot number	036 - Based on 25 stations

Noticeable events summary

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

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