Viewing archive of Wednesday, 4 March 2015

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2015 Mar 04 1225 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

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

Solar protons

Quiet

	10cm flux	Ap
04 Mar 2015	123	016
05 Mar 2015	127	018
06 Mar 2015	130	014

Bulletin

The strongest event of the period was a C4 flare peaking at 13:37UT being produced by NOAA 2290 from behind the NW limb. NOAA 2292 lost its delta, but still has some mixed polarities. The region produced 2 low- level C-class flares. An active region that has been the source of some strong CMEs over the last few days will round the SE limb within the next 1-2 days. No Earth-directed CMEs were observed. C-class flaring is expected. Geomagnetic conditions ranged from quiet to unsettled, with locally (Dourbes) an active episode at the end of the period. Earth has left the high speed stream from the southern polar CH. Solar wind speed gradually decreased from about 500 km/s to a steady 450 km/s after 22:00UT. Since 08:00UT, IMF direction seems to have changed from towards to away, and Bz started to oscillate between -8 and +8 nT. This may be in response to an anticipated sector boundary crossing. A positive CH is transiting the CM and may influence the geomagnetic field around 7 March. Quiet to active geomagnetic conditions are expected.

Today's estimated international sunspot number (ISN): 036, based on 18 stations.

Solar indices for 03 Mar 2015

Wolf number Catania	050
10cm solar flux	125
AK Chambon La Forêt	021
AK Wingst	014
Estimated Ap	015
Estimated international sunspot number	033 - Based on 20 stations

Noticeable events summary

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

All times in UTC

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