Viewing archive of Sunday, 1 December 2013

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2013 Dec 01 1201 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
01 Dec 2013	132	015
02 Dec 2013	132	007
03 Dec 2013	132	007

Bulletin

NOAA AR 1907 was responsible for the several B-flares and the 1 C-flare on November 30. We expect that the flaring situation stays as it is: a chance of 50% for C-flares, 20% for an isolated M-flare and almost zero chance for X-flares. A partial halo CME was detected on November 30 coming into the field of view of SOHO/LASCO C2 around 14:00 UT in the SE. No on disk signature could be linked to this event. STEREO B EUI 195 indicates some flaring activity and a mass ejection around that time from a region near the centre of the STEREO B solar images. This CME is determined as back-sided. The solar wind speed has reached 500 km/s since late November 30. The z-component of the interplanetary magnetic field (IMF) was mainly negative resulting in a planetary and local (Dourbes) K-index of 4 late November 30. We expect the solar wind speed to decrease gradually. We expect quiet geomagnetic conditions with possible unsettled conditions (K=3) for the remaining part of December 1.

Today's estimated international sunspot number (ISN): 084, based on 15 stations.

Solar indices for 30 Nov 2013

Wolf number Catania	///
10cm solar flux	131
AK Chambon La Forêt	024
AK Wingst	011
Estimated Ap	011
Estimated international sunspot number	/// - Based on /// stations

Noticeable events summary

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

All times in UTC

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