Viewing archive of Tuesday, 13 August 2013

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2013 Aug 13 1225 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

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

Solar protons

Quiet

	10cm flux	Ap
13 Aug 2013	120	011
14 Aug 2013	124	017
15 Aug 2013	128	018

Bulletin

Solar activity is expected to be eruptive with C class flares likely from NOAA ARs 1817 and 1818. There remains a small risk for an isolated M class flare to occur in one of these two regions. A CME was associated with the M1.5 flare of Aug. 13, but coronagraphic data suggest that the bulk of the CME is essentially going southward, and that it will miss the Earth. We expect mostly quiet geomagnetic conditions for the next 24 hours, and then unsettled to active conditions by the end of Aug. 14, due to a coronal hole becoming geoeffective.

Today's estimated international sunspot number (ISN): 077, based on 13 stations.

Solar indices for 12 Aug 2013

Wolf number Catania	///
10cm solar flux	114
AK Chambon La Forêt	010
AK Wingst	006
Estimated Ap	006
Estimated international sunspot number	060 - Based on 17 stations

Noticeable events summary

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

All times in UTC

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