Het archief bekijken van woensdag 20 september 2017

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2017 Sep 20 1253 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
20 Sep 2017	073	007
21 Sep 2017	076	007
22 Sep 2017	079	007

Bulletin

Over the past 24 hours the solar activity was very low, only few B-class flares have been recorded. Catania sunspot group 55 (NOAA active region 2680) is unlikely to produce any flaring activity. The returning region (Catania sunspot group 49 / NOAA active region 2676) is currently on the East solar limb and is the source region of the B-class flares. We expect the solar activity to increase with B-class flares and a small probability of C-class flare coming from this returning region.

No Earth directed CMEs have been observed and the solar protons remained at background level in the past 24 hours.

The Earth is currently inside a slow (around 500 km/s) solar wind flow. The interplanetary magnetic field magnitude remained below 5 nT and the Bz component fluctuating between -4 and 4 nT. The solar wind is expected maintain its nominal conditions over the next days.

Geomagnetic conditions were quiet to unsettled (local K Dourbes 1-3, NOAA Kp 2-3) and are expected to remain quiet over the next days.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 017, gebaseerd op 20 stations.

Zon indexen voor 19 Sep 2017

Wolfgetal Catania	012
10cm zonneflux	071
AK Chambon La Forêt	017
AK Wingst	012
Geschatte Ap	009
Geschat internationaal zonnevlekkengetal	012 - Gebaseerd op 32 stations

Overzicht opvallende gebeurtenissen

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

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