Viewing archive of Tuesday, 28 January 2014

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2014 Jan 28 1243 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
28 Jan 2014	153	002
29 Jan 2014	156	004
30 Jan 2014	159	001

Bulletin

Solar activity has been at active levels over the last 24 hours. 6 C- and 4 M-class flares were recorded, the strongest reached M4-level and peaked at 22:10UT in NOAA 1967. This region has nearly rounded the southeast limb and was responsible for all 10 flares. These occurred near areas of mixed magnetic polarities to the northeast and south of the big main spot, which is still very close to the limb. NOAA 1968 near the northeast limb is a lot smaller and did not produce flares. The x-ray background flux has been all day above the C1-level. Active conditions are expected to continue, with a slight chance on an X-class flare. The CMEs associated with NOAA 1967's flaring activity were directed to the east and away from Earth. Solar wind speed has been declining to values currently just above 300 km/s, with Bz varying between -5 and +5 nT. Geomagnetic conditions have been quiet and are expected to remain so.

Today's estimated international sunspot number (ISN): 056, based on 10 stations.

Solar indices for 27 Jan 2014

Wolf number Catania	///
10cm solar flux	144
AK Chambon La Forêt	005
AK Wingst	004
Estimated Ap	003
Estimated international sunspot number	055 - Based on 16 stations

Noticeable events summary

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

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