Viewing archive of Thursday, 24 January 2013

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2013 Jan 24 1226 UTC

SIDC Forecast

Solar flares

Quiet conditions (<50% probability of C-class flares)

Geomagnetism

Active conditions expected (A>=20 or K=4)

Solar protons

Quiet

	10cm flux	Ap
24 Jan 2013	107	004
25 Jan 2013	109	013
26 Jan 2013	112	003

Bulletin

Solar X-ray background flux has decreased to B2 level during the past 24 hours. We do not expect C-class flares, even if the Catania sunspot group 70 (NOAA AR 1660) keeps beta-gamma configuration of its photospheric magnetic field. The Earth is currently inside a slow (around 270 km/s) solar wind flow with weak (around 3 nT) interplanetary magnetic field magnitude. We expect quiet geomagnetic conditions in the coming hours. Tomorrow we expect the arrival of a fast solar wind stream emanating from a low-latitude coronal hole in the southern hemisphere, possibly resulting in active geomagnetic conditions.

Today's estimated international sunspot number (ISN): 038, based on 08 stations.

Solar indices for 23 Jan 2013

Wolf number Catania	072
10cm solar flux	105
AK Chambon La Forêt	004
AK Wingst	001
Estimated Ap	001
Estimated international sunspot number	040 - Based on 12 stations

Noticeable events summary

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

All times in UTC

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