Affichage des archives de vendredi, 5 juillet 2019

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2019 Jul 05 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
05 Jul 2019	068	020
06 Jul 2019	068	014
07 Jul 2019	068	007

Bulletin

The visible side of the Sun is spotless and did not produce any flares in the past 24 hours. The chance for a C flare in the next 24 hours is estimated at only 1%.

No Earth-directed Coronal Mass Ejections (CMEs) were observed in available coronagraphic imagery.

The greater than 10 MeV proton flux was at nominal levels in the past 24 hours, and is expected to stay at nominal levels in the next 24 hours.

Solar wind speed near Earth as registered by ACE varied between about 320 and 370 km/s until the arrival around 22:25 UT on July 4 of a high speed stream from a small, recurrent, negative polarity equatorial coronal hole that crossed the central meridian on July 1, which caused the solar wind speed to gradually rise from about 345 to 455 km/s, with current values around 420 km/s. The Interplanetary Magnetic Field (IMF) changed direction and is now pointed towards from the Sun. Its magnitude varied between about 1 and 8 nT in the past 24 hours. Bz was never below -5 nT for extended intervals of time. Solar wind conditions are expected to stay enhanced on July 5 and 6.

Quiet geomagnetic conditions (K Dourbes equal to 2; NOAA Kp between 1 and 2) were registered in the past 24 hours. Active intervals (K Dourbes = 4) are possible on July 5 and 6, with a chance for minor geomagnetic storm intervals (K Dourbes = 5). Quiet to unsettled geomagnetic levels (K Dourbes < 4) are expected on July 7.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 21 stations.

Indices solaires pour 04 Jul 2019

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	068
AK Chambon La Forêt	///
AK Wingst	007
Ap estimé	006
Nombre international de taches solaires estimé	000 - Basé sur 33 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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