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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2014 Jun 07 1350 UTC

SIDC Forecast

Valid from 1230 UTC, 07 Jun 2014 until 09 Jun 2014
Brillamenti solari

Active (M-class flares expected, probability >=50%)

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Quiet

10cm fluxAp
07 Jun 2014145006
08 Jun 2014150007
09 Jun 2014155008

Bulletin

One M-class and six C-class flares were observed during the past 24 hours. Catania sunspot group 69 (NOAA AR 2080) was the main source region. The M1.4 flare peaked at 19:31 on 6 June. Catania group 69 is currently magnetically most complex and has also developed a delta component. Catania groups 71 and 76 (resp NOAA ARs 2082 and 2085) have developed to beta-gamma regions. An asymmetric halo CME was observed in coronagraphic imagery (SOHO/LASCO C2,C3, STEREO A & B COR2). It was first visible in SOHO/LASCO C2 from 13:25 UT on 6 June and is mainly propagating east of the Sun Earth line. Associated activity is observed by STEREO A & B EUVI 195 near old region NOAA 2065 at the far side of the Sun. The event is thus backsided and will not be geoeffective. More M-class flare are expected during the next 48 hours, with Catania group 69 as main source candidate, but also Catania groups 71 and 76 could produce flares. Stable solar wind conditions continue with a solar wind speed between 320 and 400 km/s and the magnitude of the IMF maximally reached 6 nT. The Bz-component was fluctuating from -5 to +4 nT. Quiet geomagnetic conditions were observed and are expected to continue. There is still some chance for enhanced to active conditions for the next 24 hours as a consequence of the potential arrival of a coronal hole high speed stream.

Today's estimated international sunspot number (ISN): 100, based on 17 stations.

Solar indices for 06 Jun 2014

Wolf number Catania166
10cm solar flux133
AK Chambon La Forêt010
AK Wingst008
Estimated Ap007
Estimated international sunspot number088 - Based on 23 stations

Noticeable events summary

DayBeginMaxFineLocStrengthOP10cmCatania/NOAARadio burst types
06192619311933S12E25M1.4SF69/2080VI/2III/2

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

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