Viewing archive of Sunday, 27 September 2015

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2015 Sep 27 1333 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
27 Sep 2015	125	004
28 Sep 2015	126	005
29 Sep 2015	123	006

Bulletin

Seven active regions were reported by NOAA today. The flaring activity is dominated by the NOAA AR 2422 (Catania number 39) that developed the beta-gamma-delta configuration of its photospheric magnetic field. Today it produced two C-class flares, and an M1.9 flare peaking at 10:40 UT. No CME seems to be associated with this flare. We expect flaring activity up to the M-level. Due to the position of the NOAA AR 2422 (Catania number 39) close to the solar central meridian, an eruptive flare in this region may be associated to an Earth-directed CME. The Earth is currently inside a slow (around 420 km/s) solar wind flow with average (5-6 nT) interplanetary magnetic field magnitude. The geomagnetic conditions are quiet and are expected to remain so.

Today's estimated international sunspot number (ISN): 152, based on 19 stations.

Solar indices for 26 Sep 2015

Wolf number Catania	///
10cm solar flux	120
AK Chambon La Forêt	011
AK Wingst	006
Estimated Ap	005
Estimated international sunspot number	156 - Based on 26 stations

Noticeable events summary

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

All times in UTC

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