Viewing archive of Friday, 13 December 2013

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2013 Dec 13 1306 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

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

Solar protons

Quiet

	10cm flux	Ap
13 Dec 2013	165	007
14 Dec 2013	162	014
15 Dec 2013	158	007

Bulletin

The most active region the last 24 hours were NOAA AR 1917 near the central meridian and 1921, 30 degrees east. We expect more C-flares and a chance of 40% for M-flares. The C-flaring activity of yesterday December 12 was associated with two plasma eruptions: the flare from NOAA AR 1912 was associated with a SW oriented plasma eruption around 3UT, the flare from NOAA AR 1917 was associated with a SE oriented plasma eruption around 5UT. We don't expect the CME's to arrive at Earth. Geomagnetic conditions are quiet at the moment. The northern coronal hole can have a geomagnetic impact: a Kp of 4 is possible from tomorrow onwards.

Today's estimated international sunspot number (ISN): 096, based on 13 stations.

Solar indices for 12 Dec 2013

Wolf number Catania	190
10cm solar flux	165
AK Chambon La Forêt	003
AK Wingst	001
Estimated Ap	001
Estimated international sunspot number	108 - Based on 13 stations

Noticeable events summary

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

All times in UTC

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