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Daily bulletin on solar and geomagnetic activity from the SIDC

Vydáno: 2015 Mar 05 1225 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
05 Mar 2015	125	008
06 Mar 2015	128	014
07 Mar 2015	130	018

Bulletin

The strongest event of the period was a C3.5 flare peaking at 09:47UT by the active region at or just behind the southeast limb. Two C1 flares were observed, with sources resp. NOAA 2293 and a spotless region currently located at S10E40. Both eruptions showed interaction with a nearby filament. If the filament near NOAA 2293 erupts, it may be geo- effective. No earth-directed coronal mass ejections were observed. C-class flaring is expected, with a chance on an M-class flare. Quiet to unsettled geomagnetic conditions were observed, with locally (Dourbes) an active episode at the beginning of the period. Solar wind speed varied mostly between 530 and its current 440 km/s, with Bz mostly positive and varying between -5 and +6 nT. The interplanetary magnetic field was mostly directed away from the Sun. Quiet to unsettled geomagnetic conditions are expected, until the arrival of the high speed stream from a coronal hole late on 06 or on 07 March when active episodes may be possible.

Today's estimated international sunspot number (ISN): 021, based on 16 stations.

Solar indices for 04 Mar 2015

Wolf number Catania	099
10cm solar flux	124
AK Chambon La Forêt	017
AK Wingst	009
Estimated Ap	010
Estimated international sunspot number	034 - Based on 27 stations

Noticeable events summary

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

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