Het archief bekijken van maandag 24 september 2018

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2018 Sep 24 1230 UTC

SIDC Prognose

Zonnevlammen

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

Geomagnetisme

Quiet (A<20 and K<4)

Proton Flux monitor

Quiet

	10cm flux	Ap
24 Sep 2018	067	006
25 Sep 2018	067	007
26 Sep 2018	067	007

Bulletin

Solar activity was very low with X-ray flux remaining below B level and no spots on the visible disk. This is expected to remain so over the next days.

A filament erupted around noon September 23 from the North Eastern sector but no associated CME could be identified in coronagraph images.

Proton flux levels were at background values and are expected to remain so.

Solar wind remained slightly elevated with solar wind speed around 450 km/s. Initially, total magnetic field was elevated at 7.5-10nT with the phi angle indicating connection to negative polarity photospheric magnetic field and solar wind speed declining. But just before midnight a switch into negative polarity connection came associated with a dip in total magnetic field and a renewed slight increase of solar wind speed (reaching 480 km/s). Meanwhile the phi angle has switched back into the negative sector and solar wind is again declining (currently around 430 km/s). Solar wind speed is expected to remain slightly enhanced and may possible slightly increase under the influence of some patchy negative polarity open fields in the Southern hemisphere near the equator.

Geomagnetic conditions were quiet to unsettled (NOAA Kp 2-3 and local K Dourbes 1-3) and are expected to remain so.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 000, gebaseerd op 29 stations.

Zon indexen voor 23 Sep 2018

Wolfgetal Catania	///
10cm zonneflux	068
AK Chambon La Forêt	016
AK Wingst	012
Geschatte Ap	013
Geschat internationaal zonnevlekkengetal	000 - Gebaseerd op 22 stations

Overzicht opvallende gebeurtenissen

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

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