Het archief bekijken van zondag 23 juli 2017

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2017 Jul 23 1234 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
23 Jul 2017	070	016
24 Jul 2017	070	017
25 Jul 2017	070	007

Bulletin

The only flare of the period was a B1.5 flare peaking at 7:37UT from a region turning onto the disk in the East. With no spotted regions on disk, X-ray flux is expected to remain below C level over the next days. SoHO/LASCO C2 images show a full halo CME from 4:36UT onwards. STEREO A EUVI 195 clearly shows the event from around 3:15UT originating from the backside (in relation to Earth) of the Sun. The CME will thus not influence Earth. Another CME with limited angular width of around 100 degrees directed towards the NorthWest was recorded slightly earlier from around 01:36UT onwards in SoHO/LASCO C2 images. This event is also judged to have originated from the backside of the Sun and hence will not influence Earth. No Earth directed CMEs have been observed in coronagraph data. Solar proton fluxes are at background values and are expected to remain so.

Solar wind showed the continuing influence of the coronal hole high speed stream. Solar wind speed started and ended the reporting period around 550 km/s but reached 600 km/s during the period. Total magnetic field was around the 5-7nT range but increased towards to over 9nT by the end of the period. Bz was variable with peaks down to -7nT. Over the next 2 days we should see a return to nominal Solar wind conditions. Geomagnetic conditions were quiet to unsettled (local K Dourbes 1-3, NOAA Kp 2-3). Quiet to unsettled geomagnetic conditions are expected over the next days as high speed stream effects diminish.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 000, gebaseerd op 22 stations.

Zon indexen voor 22 Jul 2017

Wolfgetal Catania	///
10cm zonneflux	070
AK Chambon La Forêt	022
AK Wingst	016
Geschatte Ap	017
Geschat internationaal zonnevlekkengetal	000 - Gebaseerd op 26 stations

Overzicht opvallende gebeurtenissen

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

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