Viewing archive of Wednesday, 9 December 2015

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2015 Dec 09 1231 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
09 Dec 2015	105	014
10 Dec 2015	104	015
11 Dec 2015	103	010

Bulletin

The strongest flare, out of four C-class flares reported during last 24 hours, was C6.7 flare (peaked at 19:14 UT) on December 08. The flare originated from the NOAA AR 2463 and was associated with the EIT wave and the coronal dimming indicating the presence of the associated, possibly Earth directed CME. Due to the current unavailability of coronagraph data it is not possible to estimate CME width or speed, more will be reported as soon as coronagraph data become available. We expect C-class flares in the coming hours.

The solar wind speed has decreased to about 450 km/s, and the interplanetary magnetic field is stable with the magnitude of 5 nT. The geomagnetic conditions are quiet at the moment. We expect quite to active geomagnetic conditions this evening and tomorrow morning due to awaited arrival of the fast flow associated with the equatorial coronal hole (seemingly connected with the northern polar coronal hole) which has reached the central meridian late on December 06.

Today's estimated international sunspot number (ISN): 072, based on 17 stations.

Solar indices for 08 Dec 2015

Wolf number Catania	///
10cm solar flux	111
AK Chambon La Forêt	014
AK Wingst	012
Estimated Ap	012
Estimated international sunspot number	052 - Based on 21 stations

Noticeable events summary

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

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