Viewing archive of Friday, 29 January 2016

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2016 Jan 29 1230 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

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

Solar protons

Quiet

	10cm flux	Ap
29 Jan 2016	109	006
30 Jan 2016	108	007
31 Jan 2016	107	010

Bulletin

Over the past 24 hours solar activity has been low. The largest flare was a C9.6 class flare. NOAA Active Region (AR) 2488 (Macintosh class:Dao; Mag. type:Beta-Gamma) has been most active, producing 4 C-class flares, including the C9.6 class flare, which peaked at 12:02 UT. ARs 2488, 2489 and 2490 all appear stable but have exhibited some flux emergence. There is currently a positive Northern polar coronal hole located in the North-West that may increase solar wind speeds. There were a series of small Coronal Mass Ejections (CMEs) off of the West limb, none of these are expected to interact with the Earth system. No Earth directed CMEs have been detected. Solar activity is expected to remain low over the next 24 hours with a high probability of C-class flares and a low probability of M-class flares. The solar wind speed has decreased from around 360 to 300 km/s over the past 24 hours. The total magnetic field strength has remained around 5 nT. The Bz component fluctuated around 0 nT, ranging between -5 and +5 nT. Geomagnetic conditions ranged between Kp index 0-1 (NOAA) and local K index 0-2 (Dourbes). A positive polar coronal hole is currently positioned in the Western hemisphere of the Sun and the resulting high-speed stream (HSS) may enhance solar wind speeds later today and as a consequence may increase geo-activity levels.

Today's estimated international sunspot number (ISN): 063, based on 11 stations.

Solar indices for 28 Jan 2016

Wolf number Catania	092
10cm solar flux	110
AK Chambon La Forêt	007
AK Wingst	004
Estimated Ap	004
Estimated international sunspot number	069 - Based on 26 stations

Noticeable events summary

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

All times in UTC

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