Het archief bekijken van donderdag 31 juli 2014

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2014 Jul 31 1233 UTC

SIDC Prognose

Zonnevlammen

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

Geomagnetisme

Quiet (A<20 and K<4)

Proton Flux monitor

Quiet

	10cm flux	Ap
31 Jul 2014	160	004
01 Aug 2014	166	004
02 Aug 2014	172	018

Bulletin

There are currently 8 sunspot groups present on the solar disk. NOAA 2127 produced most of the flares including a C9 flare peaking at 16:17UT (30 July). Overnight, NOAA 2130 developed a delta spot south of its trailing portion and started producing flares again around 05:00UT. This culminated in an M2.5 flare peaking at 11:14UT, the strongest event of the period. Evaluation of any associated CME is pending the availability of coronagraphic images. Yesterday's filament eruption (NE quadrant) was associated to a CME which may have an Earth directed component. Based on STEREO and SOHO imagery, its true speed is estimated to be about 800 km/s and may affect the geomagnetic field on 2 August. The filaments near the NE-limb and in the SW solar quadrant are stable. Further M-class flaring is possible, in particular from NOAA 2127 and 2130. Solar wind speed varied between 300 and 350 km/s, and Bz between -3 and +4 nT. Quiet geomagnetic conditions were observed. A small equatorial coronal hole is approaching the central meridian and may influence the geomagnetic field around 4 August. Quiet geomagnetic conditions are expected until 2 August, when the CME related to the 30 July filament eruption may deliver a glancing blow and result in active geomagnetic conditions.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 101, gebaseerd op 22 stations.

Zon indexen voor 30 Jul 2014

Wolfgetal Catania	///
10cm zonneflux	152
AK Chambon La Forêt	006
AK Wingst	004
Geschatte Ap	004
Geschat internationaal zonnevlekkengetal	098 - Gebaseerd op 28 stations

Overzicht opvallende gebeurtenissen

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

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