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Daily bulletin on solar and geomagnetic activity from the SIDC

Vydáno: 2014 Mar 05 1238 UTC

SIDC Forecast

Sluneční erupce

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

Geomagnetism

Quiet (A<20 and K<4)

Sluneční protony

Quiet

	10cm flux	Ap
05 Mar 2014	159	005
06 Mar 2014	160	007
07 Mar 2014	161	005

Bulletin

There are currently 12 sunspot regions on the visible solar disk, with small delta's observed in the trailing portion of NOAA 1991. It was also here that the strongest event of the past 24 hours took place: an impulsive M1-flare peaking at 02:10UT. Two C-flares were produced by NOAA 1986 from behind the west limb, while three C-flares took place in NOAA 1991. Several CMEs were observed. The ones having a (partial) halo, which were first visible in LASCO/C2 at resp. 18:48UT and 21:17UT on 4 March, and 09:24UT on 5 March, were all backside events. None of the observed CMEs has an Earth-directed component, including the CME associated to a filament eruption near the northeast limb (+/- 21:00UT on 4 March). Eruptive flaring conditions are expected, with a small chance for an M-class flare from NOAA 1991. Solar wind speed has gradually increased to values between 400-450 km/s, with Bz varying between -5nT and +5nT. A coronal hole on the northern hemisphere has reached the central meridian and might produce active geomagnetic conditions from 8 March onwards. Geomagnetic conditions have been quiet and are expected to remain so.

Today's estimated international sunspot number (ISN): 120, based on 14 stations.

Solar indices for 04 Mar 2014

Wolf number Catania	153
10cm solar flux	158
AK Chambon La Forêt	///
AK Wingst	008
Estimated Ap	007
Estimated international sunspot number	102 - Based on 17 stations

Noticeable events summary

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

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