Viewing archive of Saturday, 26 September 2015

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2015 Sep 26 1315 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
26 Sep 2015	122	003
27 Sep 2015	120	006
28 Sep 2015	118	006

Bulletin

Eight sunspot groups were reported by NOAA today. NOAA AR 2422 (Catania number 39) is strongly growing and now has beta-gamma configuration of its photospheric magnetic field. This active region was responsible for all the flares during the past 24 hours. However, only three C-class flares occurred, the strongest of them being the C1.5 flare peaking at 01:29 UT today. We expect flaring activity on the C-level, with a small chance for an M-class event. The Earth is currently inside a slow (around 420 km/s) solar wind flow with average (around 5 nT) interplanetary magnetic field magnitude. The geomagnetic conditions are quiet and are expected to remain so.

Today's estimated international sunspot number (ISN): 157, based on 17 stations.

Solar indices for 25 Sep 2015

Wolf number Catania	142
10cm solar flux	120
AK Chambon La Forêt	012
AK Wingst	007
Estimated Ap	007
Estimated international sunspot number	149 - Based on 29 stations

Noticeable events summary

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

All times in UTC

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