Viewing archive of Saturday, 7 March 2015

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2015 Mar 07 1222 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

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

Solar protons

Quiet

	10cm flux	Ap
07 Mar 2015	135	024
08 Mar 2015	138	018
09 Mar 2015	141	013

Bulletin

NOAA 2297 is a compact and magnetically complex region still close to the southeast limb. Over the last 24 hours, it has only produced C1 and C2 flares, but it retains its potential on a strong flare over the next few days. As this region rotates further onto the solar disk, any associated coronal mass ejection (CME) may gradually become more earth-directed. Two other sunspot groups are hardly visible and quiet. No earth-directed CMEs were observed. Proton flux was at nominal levels. There's a good chance on M-class flaring. Quiet to active geomagnetic conditions were observed. Solar wind speed has gradually been increasing, from about 460 km/s at the beginning of the period to its current 550 km/s. Bz oscillated between -9 and +9 nT. The interplanetary magnetic field was directed away from the Sun. A negative polarity equatorial coronal hole (CH) will reach the central meridian late on 09 March. Quiet to active geomagnetic conditions are expected, under the influence of the high speed stream from an extended coronal hole. There's a slight chance on a minor storm episode.

Today's estimated international sunspot number (ISN): 012, based on 14 stations.

Solar indices for 06 Mar 2015

Wolf number Catania	///
10cm solar flux	127
AK Chambon La Forêt	028
AK Wingst	012
Estimated Ap	013
Estimated international sunspot number	028 - Based on 21 stations

Noticeable events summary

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

All times in UTC

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