05-10-2014

 

INFO FROM SIDC – RWC BELGIUM 2014 Oct 

 

Four low-level C-class flares were recorded. The strongest was a C1.9

peaking at 22:15UT and produced by NOAA 2172 from behind the west limb. The

x-ray background flux has decreased below the C1-level. There are currently

8 sunspot groups visible on the solar disk. Most of them are fairly simple,

and contain a filament or are close to one. Further C-class flaring is

expected. A 20-degrees long, thin, but dynamical s-shaped filament has

rounded the southeast limb. This area seems to have been responsible for a

filament eruption on 03 October between 03:00 and 04:30UT. The associated

CME was not directed to Earth.

 

Solar wind speed increased from about 330 to 370 km/s. Bz was initially

fluctuating around 0 nT untill about 05:00UT, when it gradually increased

to the current +10 nT. Geomagnetic conditions were quiet to unsettled, and

are expected to remain so, with locally an active episode possible.

 

INFO FROM SIDC – RWC BELGIUM 2014

 

The only C-class event of the period was a C1 flare peaking at 09:54UT and

produced by NOAA 2178. The 7 groups currently visible on the solar disk

have a relatively simple magnetic configuration and have been quiet.

Numerous filaments are present on the solar disk, but they are mostly small

and quiet. There remains a chance on an C-class flare. No obvious CMEs were

observed during the period.

 

A corotating interaction region has influenced the solar wind since late on

3 October. Around 17:00UT on 4 October, the direction of the IMF turned

towards the Sun, and solar wind speed peaked near values of 480 km/s early

on 5 October. Bz was mostly positive, fluctuating between -5 and +10 nT

during the latter half of the observation period. Geomagnetic conditions

were quiet to unsettled and are expected to remain so.