Het archief bekijken van woensdag 15 april 2020

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2020 Apr 15 1231 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
15 Apr 2020	070	008
16 Apr 2020	070	009
17 Apr 2020	070	009

Bulletin

There were no sunspot groups visible on the solar disk. Solar activity was at very low levels and is expected to remain so.

The greater than 10 MeV proton flux and the greater than 2 MeV electron flux were at nominal values and are expected to remain so.

STEREO-A and SOHO observed a coronal mass ejection (CME) at both their respective east and west limb starting simultaneously during the afternoon of 14 April. These concerned very slow moving CMEs with a plane-of-the-sky speed around 200 km/s, with no obvious solar disk signature. Standing-by further coronagraphic imagery to determine any earth-directed component.

Solar wind speed undulated between 380 and 450 km/s ending the period near 415 km/s (DSCOVR). Bz varied between -4 and +3 nT, however with a mostly negative stretch between 20 and 05UT. The direction of the interplanetary magnetic field (phi angle) was mostly variable, but ended the period in a predominantly sunward orientation (negative sector).

Geomagnetic activity was at quiet to unsettled levels and is expected to remain so during the next few days.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 000, gebaseerd op 30 stations.

Zon indexen voor 14 Apr 2020

Wolfgetal Catania	///
10cm zonneflux	069
AK Chambon La Forêt	014
AK Wingst	008
Geschatte Ap	009
Geschat internationaal zonnevlekkengetal	000 - Gebaseerd op 33 stations

Overzicht opvallende gebeurtenissen

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

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