Viewing archive of Tuesday, 30 September 2014

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2014 Sep 30 1222 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

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

	10cm flux	Ap
30 Sep 2014	177	011
01 Oct 2014	179	007
02 Oct 2014	175	010

Bulletin

There are currently 10 sunspot groups on the solar disk, with two active regions approaching the east limb. However, only NOAA 2173 is producing low-level C-class flaring, the strongest being a C3.3 flare peaking at 21:32UT. NOAA 2175 and NOAA 2177 have some mixed magnetic polarities, but have remained quiet. No Earth-directed CMEs have been observed. The x-ray background flux is already 5 consecutive days above the C1-level. Two 20-degrees long filaments visible in the western solar hemisphere have remained quiet. C-class flaring is expected, with a reasonable chance on an isolated M-class flare. Solar wind speed varied mostly between 340 and 380 km/s, with Bz fluctuating between -7 and +5 nT. Quiet to unsettled geomagnetic conditions were observed, with Kp having some active periods. Geomagnetic conditions are expected to be quiet to unsettled, with locally an active period possible.

Today's estimated international sunspot number (ISN): 127, based on 22 stations.

Solar indices for 29 Sep 2014

Wolf number Catania	///
10cm solar flux	175
AK Chambon La Forêt	022
AK Wingst	013
Estimated Ap	013
Estimated international sunspot number	126 - 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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