Het archief bekijken van woensdag 28 januari 2015

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2015 Jan 28 1223 UTC

SIDC Prognose

Zonnevlammen

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

Geomagnetisme

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

Proton Flux monitor

Quiet

	10cm flux	Ap
28 Jan 2015	168	015
29 Jan 2015	175	018
30 Jan 2015	180	018

Bulletin

Four C- and one M-class flare were observed over the period. The strongest event was an M1.4 flare peaking at 04:41 UT in NOAA 2268. Currently available data and imagery suggest no CME was associated to this flare. NOAA 2268 still has mixed magnetic polarities in its trailing portion. Old active region NOAA 2257 is rounding the east limb. This is a complex group, but produced only one minor C-class flare. No earth-directed CMEs have been observed. The x-ray background flux was mostly above the C1-level. A 20 degree long filament near the solar equator is at W55 and thus in a geoeffective position in case of eruption. Further M-class flaring is expected. Solar wind varied mostly between 440 and 500 km/s, with a peak of about 530 km/s around 03:00UT. Bz was mildly positive during the period, with negative excursions between 19:00UT and 22:00UT (-5 nT) and again between 04:00 and 08:00UT (-7 nT). Geomagnetic conditions were mostly unsettled with locally (Dourbes) some active episodes shortly after midnight.The solar wind is expected to remain disturbed, with further influences from the CH HSS and a possible glancing blow on 30 January from the 24 January CME. The geomagnetic field is expected to range from quiet to active conditions.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 107, gebaseerd op 08 stations.

Zon indexen voor 27 Jan 2015

Wolfgetal Catania	///
10cm zonneflux	158
AK Chambon La Forêt	023
AK Wingst	014
Geschatte Ap	014
Geschat internationaal zonnevlekkengetal	097 - Gebaseerd op 19 stations

Overzicht opvallende gebeurtenissen

Aangeboden door het Solar Influences Data Analysis Center© - SIDC - Verwerkt door SpaceWeatherLive

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