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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2013 Jul 30 1333 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
30 Jul 2013	116	006
31 Jul 2013	114	004
01 Aug 2013	113	011

Bulletin

NOAA AR 1800 turns over the west limb, out of view. The region produced 2 C-class flares yesterday, July 29. NOAA AR 1801 (Catania 38) flared once in the C-level today, July 30. C-flares are possible the coming day, but in general the X-ray flaring activity is limited. The geomagnetic conditions are quiet at the moment: speed 400 km/s, interplanetary magnetic field of 5nT. The Bz component is negative at the moment. If this stays so for a longer time, unsettled geomagnetic conditions can occur. From July 2, Earth can be situated in the fast solar wind stream emanating from the norther coronal hole which passed today the central meridian.

Today's estimated international sunspot number (ISN): 053, based on 11 stations.

Solar indices for 29 Jul 2013

Wolf number Catania	117
10cm solar flux	112
AK Chambon La Forêt	009
AK Wingst	006
Estimated Ap	005
Estimated international sunspot number	067 - Based on 23 stations

Noticeable events summary

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

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