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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2013 Aug 19 1243 UTC

SIDC Forecast

Brillamenti solari

Quiet conditions (<50% probability of C-class flares)

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Quiet

	10cm flux	Ap
19 Aug 2013	130	006
20 Aug 2013	130	023
21 Aug 2013	130	012

Bulletin

The strongest solar event of the past 24 hours was a C1.9 flare originating from NOAA AR 1817 at 9h22 UT. We expect solar activity to stay at eruptive levels with chances for C class flares mainly from NOAA ARs 1817, 1818 and 1824 and a small risk for an isolated M class flare. An increase in the solar wind speed is expected due to the effects of the recurrent equatorial CH high-speed stream. Enhanced geomagnetic activity is possible (unsettled to active) for the next two days, in relation to the CH and the possible arrival of the CME of August 17.

Today's estimated international sunspot number (ISN): 091, based on 16 stations.

Solar indices for 18 Aug 2013

Wolf number Catania	///
10cm solar flux	126
AK Chambon La Forêt	010
AK Wingst	008
Estimated Ap	006
Estimated international sunspot number	077 - Based on 19 stations

Noticeable events summary

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

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