Affichage des archives de samedi, 17 juin 2023

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2023 Jun 17 1233 UTC

Prévisions SIDC

Éruptions solaires

C-class flares expected, (probability >=50%)

Géomagnétisme

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

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
17 Jun 2023	163	018
18 Jun 2023	168	010
19 Jun 2023	165	009

Régions solaires actives et éruptions solaires

The solar flaring activity was at moderate levels. The largest flare was a M1 flare peaking at 19:59 UTC on June 16, associated with NOAA AR 3331. NOAA AR 3335 and 3333 exhibited sunspot growth and are the most complex regions on the solar disk. The other regions on the disk (NOAA AR 3338 and 3336) are magnetically simpler but continue to produce low level C-class flares. The solar flaring activity is expected to be at low levels over the next 24 hours with C-class flares likely and M-class flares possible.

Éjection de masse coronale

In the last 24 hours there were no Earth-directed Coronal Mass Ejections (CMEs) detected in the available coronagraph observations.

Trous coronaux

A small positive negative polarity coronal hole and a larger negative polarity coronal hole in the southern hemisphere began to transit the central meridian on June 17.

Vent solaire

The solar wind conditions reflected the continued influence of the high speed stream. The interplanetary magnetic field decreased from 8 nT to around 4nT. Bz had a minimum value of -6nT and was predominantly negative. The solar wind speed decreased from 650 km/s to values around 550 km/s. The magnetic field orientation was predominantly in the negative sector (field directed towards from the Sun). Over the next 24 hours, the interplanetary magnetic field and solar wind speed are expected to continue to slowly decrease under the waning influence of the high speed stream.

Géomagnétisme

During last 24 hours the geomagnetic conditions reached active conditions (NOAA KP 2-4 and K-Bel 2-4). Geomagnetic conditions are expected to be at quiet to unsettled levels over the next days, with further active intervals possible on June 17 while the solar wind speed remains elevated.

Niveaux de flux de protons

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.

Flux d'électrons sur l'orbite géostationnaire

The greater than 2 MeV electron flux was increasing but remained below the 1000 pfu threshold. It is expected to exceed this threshold over the next days. The 24h electron fluence was at normal levels. The electron fluence is expected to be at moderate levels for the next days.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 127, sur la base de 20 stations.

Indices solaires pour 16 Jun 2023

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	157
AK Chambon La Forêt	026
AK Wingst	032
Ap estimé	034
Nombre international de taches solaires estimé	127 - Basé sur 29 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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