Viewing archive of Saturday, 30 November 2013

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2013 Nov 30 1245 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
30 Nov 2013	131	013
01 Dec 2013	130	008
02 Dec 2013	129	007

Bulletin

NOAA AR 1907 produced the only C-flare of yesterday November 30. We forecast a probability for C-flares slightly above 50%. A partial halo CME was detected by CACTus. The CME appeared in the field of view of SOHO/LASCO C2 around 19:00, November 29. There was no clear on disk signature of the eruption. We can assume that the CME is back sided. The solar wind speed increased to 350 km/s. The total interplanetary magnetic field (IMF) shows also an increase since yesterday. The solar wind structure passing near the L1 point can be possibly linked to the northern coronal hole that passed the central meridian on November 24. The plasma pressure although was not strong enough to cause a geomagnetic disturbance. Similar for the z-component of the IMF which was not strongly negative. The planetary Kp stayed below 4. We expect quiet geomagnetic conditions with K lower than 4.

Today's estimated international sunspot number (ISN): 074, based on 14 stations.

Solar indices for 29 Nov 2013

Wolf number Catania	///
10cm solar flux	129
AK Chambon La Forêt	015
AK Wingst	008
Estimated Ap	008
Estimated international sunspot number	071 - Based on 11 stations

Noticeable events summary

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

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