Viewing archive of Sunday, 27 January 2013

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2013 Jan 27 1246 UTC

SIDC Forecast

Solar flares

Quiet conditions (<50% probability of C-class flares)

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
27 Jan 2013	097	011
28 Jan 2013	095	004
29 Jan 2013	093	004

Bulletin

Despite the emergence of several small sunspot groups (yet unreported by Catania or NOAA), the flaring activity of the Sun is below the C-level. An isolated C-class flare is nevertheless possible, although unlikely. The fast solar wind flow that yesterday produced K = 5 (as reported by Dourbes and IZMIRAN) and K = 4 (as reported by NOAA) is finishing. Currently the solar wind speed around the Earth is close to 450 km/s and the interplanetary magnetic field is around 3-4 nT. We expect quiet geomagnetic conditions in the coming hours. The arrival of the interplanetary shock wave driven by the ICME corresponding to the partial halo CME observed on the Sun on January 23 is still possible, although unlikely.

Today's estimated international sunspot number (ISN): 049, based on 02 stations.

Solar indices for 26 Jan 2013

Wolf number Catania	///
10cm solar flux	099
AK Chambon La Forêt	038
AK Wingst	025
Estimated Ap	029
Estimated international sunspot number	042 - Based on 12 stations

Noticeable events summary

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

All times in UTC

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