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Daily bulletin on solar and geomagnetic activity from the SIDC

Vydáno: 2013 Dec 14 1245 UTC

SIDC Forecast

Sluneční erupce

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

Geomagnetism

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

Sluneční protony

Quiet

	10cm flux	Ap
14 Dec 2013	163	013
15 Dec 2013	160	006
16 Dec 2013	160	004

Bulletin

The X-ray background radiation has decreased slightly. C-flaring activity is however still very likely. A forward shock is seen in ACE solar wind data around 12UT on December 13: temperature, density and magnetic field strength increased, the speed increased from around 270 km/s to 330 km/s. The shock is probably linked to the interaction of a slow and fast solar wind stream giving rise to a co-rotating interaction region. The northern coronal hole that reached the central meridian on December 10 is responsible for the fast solar wind. The planetary K index became 4 during one 3-hour interval this morning, December 14. The total magnetic field strength at the L1 point is around 10 nT, the wind carries 10 particles per cm3 at a speed of around 400 km/s. Active conditions are possible.

Today's estimated international sunspot number (ISN): 094, based on 11 stations.

Solar indices for 13 Dec 2013

Wolf number Catania	186
10cm solar flux	163
AK Chambon La Forêt	015
AK Wingst	003
Estimated Ap	003
Estimated international sunspot number	097 - Based on 20 stations

Noticeable events summary

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

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