Viewing archive of Saturday, 24 August 2013

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2013 Aug 24 1232 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Minor storm expected (A>=30 or K=5)

Solar protons

Quiet

	10cm flux	Ap
24 Aug 2013	118	024
25 Aug 2013	120	028
26 Aug 2013	122	006

Bulletin

Solar activity was very low, featuring only 2 C-class flares (C1.0 and C1.4), with a source region near NOAA AR 1830. All active regions were quite stable. Solar activity is expected to be low, with a slight chance for C-class flares. No Earth directed CMEs were observed. ACE observed a small shock in the solar wind data at 00h00 UT this night, indicating the arrival of a CME, possibly that of 20 or 21 August. Solar wind speed currently is around 500 km/s. The magnitude of the interplanetary magnetic field had a maximum of 9 nT, with a Bz component fluctuating between +5 and -5 nT. Current geomagnetic conditions are unsettled. We expect unsettled to minor storm levels for the next 48 hours, related to the CME arrival, possibly combined with some minor influence of a coronal hole fast speed stream.

Today's estimated international sunspot number (ISN): 051, based on 04 stations.

Solar indices for 23 Aug 2013

Wolf number Catania	///
10cm solar flux	124
AK Chambon La Forêt	019
AK Wingst	018
Estimated Ap	018
Estimated international sunspot number	094 - Based on 22 stations

Noticeable events summary

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

All times in UTC

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