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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2014 Jan 27 1302 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Quiet

	10cm flux	Ap
27 Jan 2014	143	003
28 Jan 2014	153	012
29 Jan 2014	158	004

Bulletin

2 M-flares and 5 C-class flares were observed over the last 24 hours. The bulk of the flares, including the 2 M1-flares peaking resp. at 01:22UT and 02:11UT, originated from a region behind the southeast limb. The strongest C-class flare was a C6 that peaked at 08:23UT in a group just behind the northeast limb. Both regions are the return of the old regions NOAA 1944/1946. In particular NOAA 1944 was very active at that time with numerous M- and 1 X-class flare. Both regions remained very active during their backside transit. The two sunspot regions that are currently dominating the solar disk, NOAA 1959 and 1960, have been quiet. Further C-class flaring is expected with a chance on more M-class flaring. None of the observed CMEs are Earth directed. They are backside events, including an impressive CME first seen by STEREO-B/EUVI-COR2 imagery at 22:40UT. Solar wind speed was around 360 km/s, and Bz varied between -4 and +4nT. Geomagnetic conditions were quiet. Quiet to unsettled geomagnetic conditions are expected over the next 3 days.

Today's estimated international sunspot number (ISN): 054, based on 10 stations.

Solar indices for 26 Jan 2014

Wolf number Catania	///
10cm solar flux	138
AK Chambon La Forêt	009
AK Wingst	009
Estimated Ap	007
Estimated international sunspot number	074 - Based on 10 stations

Noticeable events summary

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

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