Viewing archive of Wednesday, 13 August 2014

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2014 Aug 13 1226 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
13 Aug 2014	105	007
14 Aug 2014	105	007
15 Aug 2014	105	007

Bulletin

There were no C flares during the past 24 hours. In the next 48 hours, eruptive conditions (C flaring) are possible, especially from NOAA AR 2139, 2140, and 2137. CACTUS detected a partial halo CME first observed by LASCO C2 at 5:48 UT on August 12. This CME is most probably associated with a backside eruption visible on STEREO A EUVI 195 images around 4:55 UT and hence will not be geo-effective. Over the past 24 hours, solar wind speed as observed by ACE varied between about 400 and 480 km/s, with current values around 440 km/s. The magnitude of the Interplanetary Magnetic Field (IMF) varied between 3 and 9 nT. Over the past 24 hours, geomagnetic conditions were quiet to active (K Dourbes between 2 and 4; NOAA Kp between 1 and 4). Quiet geomagnetic levels (K Dourbes < 4) are expected on August 13, 14 and 15.

Today's estimated international sunspot number (ISN): 056, based on 15 stations.

Solar indices for 12 Aug 2014

Wolf number Catania	///
10cm solar flux	104
AK Chambon La Forêt	022
AK Wingst	014
Estimated Ap	014
Estimated international sunspot number	054 - 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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