Het archief bekijken van maandag 22 mei 2023

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2023 May 22 1254 UTC

SIDC Prognose

Zonnevlammen

M-class flares expected (probability >=50%)

Geomagnetisme

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

Proton Flux monitor

Quiet

	10cm flux	Ap
22 May 2023	163	018
23 May 2023	163	028
24 May 2023	163	016

Zonnevlekkengebieden en zonnevlammen

Solar flaring activity was at moderate levels in the past 24 hours. The strongest activity was an M2.6-flare with start time 15:49 UTC, peak time 16:04 UTC, end time 16:31 UTC on May 21st. The flaring was produced by NOAA AR 3311 (beta-gamma-delta), which is currently the largest, most active and most complex sunspot group on the visible solar disc. Multiple low to high C-class flaring was produced by NOAA AR 3305 (beta) from the west limb. The remaining six active regions have been relatively simple and inactive. The solar flaring activity is expected to be at low to moderate levels over the next 24 hours with some chances for isolated X-class flaring from NOAA AR 3311.

Coronale massa uitstoten

A fast full halo coronal mass ejection (CME) was first observed in the LASCO/C2 chronograph imagery at 00:12 UTC on May 22nd. The CME is back-sided and is not expected to impact Earth. No Earth- directed CMEs have been detected in the available coronagraph imagery.

Coronale gaten

A negative polarity equatorial coronal hole has crossed the central meridian on May 21st. An associated high speed stream is expected to arrive at Earth as early as May 23rd.

Zonnewind

Over the past 24 hours the solar wind parameters (ACE and DSCOVR) Solar wind parameters were under the mixed influence of a high speed stream (HSS) arrival from a negative polarity coronal hole and a weak ICME arrival related to the flare-driven CME from May 17th. The solar wind velocity decreased varied between 439 and 657 km/s. The interplanetary magnetic field reached a maximum value of 13.22 nT and a minimum Bz of -10.57 nT. The B field was switching orientation between the positive and the negative sector (directed away from and towards the Sun). The solar wind conditions are expected to remain elevated over the next 24 hours with the ongoing ICME passage with possible further enhancements on May 23rd with the expected HSS arrival.

Geomagnetisme

The geomagnetic conditions over the past 24 hours have reached globally moderate storm levels between 18:00 and 24:00 UTC on May 21st. Locally over Belgium mostly active conditions were registered with an isolated minor storm period between 18:00 and 19:00 UTC on May 21st. Mostly unsettled to active geomagnetic conditions are expected over the next 24 hours with chances for minor to moderate storm intervals due to the expected high speed stream arrival on May 23rd.

Proton flux niveaus

Over the past 24 hours the greater than 10 MeV GOES proton flux was at nominal levels and is expected to remain so over the next days depending on flaring and possible CMEs activity, particularly from NOAA AR 3311.

Elektronenfluxen in geostationaire baan

The greater than 2 MeV electron flux has reached the 1000 pfu threshold between 15:00 and 16:00 UTC on May 21st and returned to background values thereafter. The greater than 2 MeV electron flux is expected to be below the 1000 pfu threshold in the upcoming days. The 24h electron fluence was at nominal levels and is expected to remain so over the next days.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 136, gebaseerd op 15 stations.

Zon indexen voor 21 May 2023

Wolfgetal Catania	///
10cm zonneflux	163
AK Chambon La Forêt	045
AK Wingst	024
Geschatte Ap	024
Geschat internationaal zonnevlekkengetal	138 - Gebaseerd op 27 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