Het archief bekijken van maandag 12 juli 2021

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2021 Jul 12 1231 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
12 Jul 2021	075	025
13 Jul 2021	077	017
14 Jul 2021	080	007

Bulletin

Solar activity was at very low levels. NOAA Active Region (AR) 2841 (Catania sunspot group 16) produced a B-class flare, while the larger NOAA AR 2842 (Catania sunspot group 17) did not produce any noticeable activity. Solar activity is expected to be very low over the next 24 hours with a low probability of a C-class flare.

No Earth directed Coronal Mass Ejections (CMEs) have been detected in the available coronagraph imagery.

The greater than 10 MeV proton flux was at nominal levels over the past 24 hours and is expected to remain so for the next 24 hours. The greater than 2 MeV electron flux remained below the 1000 pfu alert threshold and is expected to remain below this level during the next 24 hours. The 24h electron fluence was at nominal levels and is expected to remain so.

The solar wind speed decreased in the last 24 hours from 370 km/s to 290 km/s. The total magnetic field varied between 1 and 6 nT. The Bz varied between -4 and 5 nT and it was predominantly negative. The interplanetary magnetic field phi angle was predominantly in the positive sector (directed away from the Sun). The solar wind speed and magnetic field are expected to become enhanced in the next 24 hours. This is because of the expected arrival of the High Speed Stream (HSS) associated with the patchy negative polarity Coronal Hole (CH) that began to cross the central meridian on July 09.

Geomagnetic conditions were quiet globally (NOAA Kp 1) and quiet to unsettle locally (K Dourbes 1-3) over the past 24 hours. They are expected to become active in the next 24 hours, with minor storm conditions possible, due to the arrival of the aforementioned HSS.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 021, gebaseerd op 14 stations.

Zon indexen voor 11 Jul 2021

Wolfgetal Catania	///
10cm zonneflux	074
AK Chambon La Forêt	010
AK Wingst	004
Geschatte Ap	004
Geschat internationaal zonnevlekkengetal	022 - Gebaseerd op 23 stations

Overzicht opvallende gebeurtenissen

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

Alle tijden in UTC

<< Keer terug naar de dagelijkse overview pagina