Het archief bekijken van dinsdag 10 april 2018

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2018 Apr 10 1235 UTC

SIDC Prognose

Zonnevlammen

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

Geomagnetisme

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

Proton Flux monitor

Quiet

	10cm flux	Ap
10 Apr 2018	069	015
11 Apr 2018	069	012
12 Apr 2018	069	005

Bulletin

The solar activity has been quiet over the past 24 hours. The visible solar disc is spotless and no flare has been recorded. A bipolar region shortly developed around noon on April 09 (near the central meridian, around latitude 30 South), but gradually decay. Quiet flaring conditions are expected for the next 24-hour period.

No Earth directed Coronal Mass Ejection has been observed. The greater than 10 MeV solar protons flux remained at nominal levels over the past 24 hours and is expected to remain so.

The Earth is currently under the influence of the enhanced solar wind speed associated with the equatorial coronal hole (which has crossed the central meridian on April 05). The solar wind speed has increased from around 470 to 560 km/s over the past 24 hours. The total magnetic field strength ranged between 5 and 8.5 nT with a peak of 9.5 nT at 02:25 UT on April 10. The Bz component was ranging between -8.2 and +7.5 nT with prolonged periods of southward direction between 13:10 and 21:30 UT on April 09, and between 01:45 and 09:28 UT on April 10. The enhanced solar wind conditions are expected to persist for the next 24-hours period and until the influence of the HSS associated with the coronal hole decay.

Geomagnetic conditions have been active over the past 24 hours. Kp index 4 (NOAA) was observed at 21:30 UT on April 09, and between 05:30 and 08:00 UT on April 10, which corresponds to the Bz component being negative for two prolonged periods. The local K index 4 (Dourbes) was observed between 22:00 and 23:00 UT on April 09. Due to the ongoing enhancement of the solar wind, active Geomagnetic conditions are expected, isolated minor geomagnetic storms cannot be excluded, especially if Bz component remains negative for long period of time.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 007, gebaseerd op 22 stations.

Zon indexen voor 09 Apr 2018

Wolfgetal Catania	000
10cm zonneflux	069
AK Chambon La Forêt	025
AK Wingst	014
Geschatte Ap	014
Geschat internationaal zonnevlekkengetal	000 - Gebaseerd op 18 stations

Overzicht opvallende gebeurtenissen

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

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