Affichage des archives de lundi, 24 janvier 2022

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2022 Jan 24 1242 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
24 Jan 2022	094	005
25 Jan 2022	094	017
26 Jan 2022	094	017

Bulletin

Solar activity was at low levels with with some C1-class flares over the last 24 hours. The 2 visible active regions on the solar disk are both with alpha magnetic field configuration. Solar activity is expected to remind mostly low with possible C-class flare in the next 24 hours.

No Earth directed Coronal Mass Ejection (CME) has been detected in the available coronagraph imagery over the last 24 hours. The CME that erupted on 22 January at 10:36 UT (angular width about 90 degrees) was directed mostly towards the North East. It could have an Earth directed component, with expected arrival on 26 January.

The greater than 2 MeV electron flux exceeded the 1000 pfu alert threshold in the past 24 hours and is expected to remain close to the threshold in the next 24 hours. The greater than 2 MeV electron fluence was moderate levels in the past 24 hours and is expected to be at between nominal and moderate levels in the next 24 hours.

The solar wind speed at Earth is about 300 km/s, and the interplanetary magnetic field around 1 nT and 6 nT. The high-speed streams from an equatorial Coronal Hole (positive polarity) that traverse the central meridian on Jan 21 may enhance the solar wind parameters near Earth later today and tomorrow.

Geomagnetic conditions were quiet locally (K_Bel 0 - 2) and at planetary levels (Kp 2 - 3). The CME from 20 January may still arrive to the Earth in the next 24 hours, increasing geomagnetic conditions to active or even minor storm levels may occur. Geomagnetic conditions are also expected to become unsettled later today and tomorrow in response to the arrival of the high-speed streams from an equatorial Coronal Hole (positive polarity).

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 027, sur la base de 13 stations.

Indices solaires pour 23 Jan 2022

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	094
AK Chambon La Forêt	009
AK Wingst	008
Ap estimé	007
Nombre international de taches solaires estimé	020 - Basé sur 11 stations

Résumé des événements marquants

Données fournies par le Solar Influences Data analysis Center© - SIDC - Traité par SpaceWeatherLive

Toutes les heures sont indiquées en UTC

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