Viewing archive of Thursday, 17 January 2013

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2013 Jan 17 1146 UTC

SIDC Forecast

Solar flares

Quiet conditions (<50% probability of C-class flares)

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
17 Jan 2013	132	010
18 Jan 2013	129	003
19 Jan 2013	125	001

Bulletin

Solar activity has been quiet with one isolated C2.2 flare originating from AR NOAA 1650. Conditions are expected to be rather quiet, but an isolated C flare or M flare is possible especially from AR NOAA 1654. A partial HALO CME has been detected by LASCO C2 at January 16th 2013 19:12 UT and confirmed in STEREO A C2. The source region seems to be NOAA 1650 on the southwest limb based on the SWAP images of Proba2. CACTUS indicates a velocity of around 680 km/s and an angular width of 122 degrees. There is a small chance that this CME might reach Earth around January 20th 2013 01:30 UT and become geo-effective. The interplanetary magnetic field increased slightly to 10 nT with a positive Bz component. Geomagnetic conditions are quiet and expected to remain so for the next 48 hours.

Today's estimated international sunspot number (ISN): 045, based on 04 stations.

Solar indices for 16 Jan 2013

Wolf number Catania	121
10cm solar flux	137
AK Chambon La Forêt	017
AK Wingst	008
Estimated Ap	007
Estimated international sunspot number	062 - Based on 11 stations

Noticeable events summary

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

All times in UTC

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