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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2013 Jul 24 1309 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

Active conditions expected (A>=20 or K=4)

Protoni solari

Quiet

	10cm flux	Ap
24 Jul 2013	109	007
25 Jul 2013	112	018
26 Jul 2013	115	005

Bulletin

Six sunspot groups are reported by Catania today. One of them (Catania number 35, NOAA AR 1800) has beta-gamma configuration of the photospheric magnetic field. We expect flaring activity on the C-level, although the last C-class flare took place on July 21 and only B-class flares are reported during the last days. The Earth is currently inside the slow (around 350 km/s) solar wind flow with weak to average (3-4 nT) interplanetary magnetic field magnitude. We expect quiet geomagnetic conditions in the coming hours. Tomorrow we expect the arrival of the fast flow from the equatorial coronal hole, possibly resulting in active geomagnetic conditions.

Today's estimated international sunspot number (ISN): 044, based on 11 stations.

Solar indices for 23 Jul 2013

Wolf number Catania	090
10cm solar flux	107
AK Chambon La Forêt	010
AK Wingst	006
Estimated Ap	005
Estimated international sunspot number	054 - Based on 22 stations

Noticeable events summary

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

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