Viewing archive of Tuesday, 12 August 2014

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2014 Aug 12 1232 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
12 Aug 2014	108	010
13 Aug 2014	108	013
14 Aug 2014	108	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 AR 2139, 2137, and 2134. Over the past 24 hours, solar wind speed as observed by ACE increased from about 420 to a maximum of 560 km/s and then decreased again till the current values around 440 km/s. This is probably the effect of a coronal hole high speed stream. The magnitude of the Interplanetary Magnetic Field (IMF) varied between 4 and 9 nT. Over the past 24 hours, geomagnetic conditions were quiet (K Dourbes between 1 and 3; NOAA Kp between 1 and 3). Quiet geomagnetic levels (K Dourbes < 4) are expected on August 12, 13 and 14, with possible excursions to active levels on August 13 due to the expected arrival of a coronal hole high speed stream.

Today's estimated international sunspot number (ISN): 052, based on 15 stations.

Solar indices for 11 Aug 2014

Wolf number Catania	///
10cm solar flux	///
AK Chambon La Forêt	015
AK Wingst	010
Estimated Ap	008
Estimated international sunspot number	048 - Based on 27 stations

Noticeable events summary

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

All times in UTC

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