Affichage des archives de mercredi, 12 juin 2019

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2019 Jun 12 1230 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

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

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
12 Jun 2019	069	012
13 Jun 2019	068	015
14 Jun 2019	068	008

Bulletin

Solar activity was at very low levels. The solar disk was spotless. No coronal mass ejections (CME) were observed over the last 24 hours. The greater than 10 MeV proton flux was at nominal values.

Solar activity is expected to remain at very low levels.

Solar wind parameters were at nominal levels until around 09UT when the interplanetary magnetic field changed its direction from towards to away from the Sun. This coincided with a gradual increase of the solar wind speed from about 300 km/s to its current 370 km/s, and Bz starting to vary between -5 and +5 nT. Solar wind density, which had been steadily increasing from 5/cm3 to 24/cm3 over the period, quickly dropped to 4/cm3 after 09UT. These changes in the solar wind parameters reflect the arrival of the co-rotating interaction region (CIR) and the wind stream associated with the extension of the positive polarity northern polar coronal hole (CH). Quiet geomagnetic conditions were observed.

Quiet to active geomagnetic conditions are expected in response to the wind stream from the CH.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 15 stations.

Indices solaires pour 11 Jun 2019

Nombre de Wolf, observé par Catania	000
Flux solaire à 10 cm	070
AK Chambon La Forêt	006
AK Wingst	002
Ap estimé	002
Nombre international de taches solaires estimé	000 - Basé sur 32 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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