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Daily bulletin on solar and geomagnetic activity from the SIDC

Vydáno: 2014 Aug 31 1227 UTC

SIDC Forecast

Sluneční erupce

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

Geomagnetism

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

Sluneční protony

Quiet

	10cm flux	Ap
31 Aug 2014	135	016
01 Sep 2014	135	006
02 Sep 2014	140	004

Bulletin

A handful of C-class flares were observed, with NOAA AR 2149 and AR 2152 as source regions. NOAA AR 2152 has grown in size and complexity and has developed to a beta-gamma region. More C-class flares are expected, with a slight chance for an M-class flare. No Earth-directed CMEs were visible in coronographic images. The solar wind is under influence of a coronal hole (CH) high speed stream (HSS). The solar wind speed, as observed by ACE, reached values between 400 and 450 km/s. The magnetic field is relatively stable around 6 to 7 nT, with a fluctuating Bz. Geomagnetic conditions are unsettled to active and are expected remain so for the next few hours, until quiet conditions return.

Today's estimated international sunspot number (ISN): 057, based on 17 stations.

Solar indices for 30 Aug 2014

Wolf number Catania	///
10cm solar flux	123
AK Chambon La Forêt	019
AK Wingst	016
Estimated Ap	017
Estimated international sunspot number	057 - Based on 15 stations

Noticeable events summary

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

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