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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2014 Sep 29 1229 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Warning condition (activity levels expected to increase, but no numeric forecast given)

	10cm flux	Ap
29 Sep 2014	183	005
30 Sep 2014	185	005
01 Oct 2014	187	005

Bulletin

There are currently 8 sunspot regions visible on the solar disk. NOAA 2173 produced a long-duration M1.0 flare (peaking at 17:33UT) and 2 C-class flares. The CME related to the M1.0 flare was fairly narrow and directed to the southwest (away from Earth). Small sunspot region NOAA 2176 produced a C2 flare peaking at 03:51UT, and NOAA 2177 produced a C5.4 flare peaking at 05:54UT. The two most prominent regions, NOAA 2172 and compact NOAA 2175, remained quiet. Small delta structures are present in NOAA 2175 and NOAA 2177. Two 20-degrees long filaments are visible in the western solar hemisphere. Further M-class flaring is possible. Solar wind speed gradually slowed down from about 440 to 360 km/s. Bz oscillated between -5 and +4 nT. Geomagnetic conditions were quiet to unsettled and are expected to remain so.

Today's estimated international sunspot number (ISN): 126, based on 11 stations.

Solar indices for 28 Sep 2014

Wolf number Catania	///
10cm solar flux	181
AK Chambon La Forêt	014
AK Wingst	011
Estimated Ap	010
Estimated international sunspot number	134 - Based on 19 stations

Noticeable events summary

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

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