Affichage des archives de mardi, 9 juillet 2019

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2019 Jul 09 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
09 Jul 2019	067	011
10 Jul 2019	066	007
11 Jul 2019	065	007

Bulletin

No active regions visible on the Sun. No flares observed, nor expected.

No Earth directed CMEs in past 24 h. Solar protons have remained at background levels over the past 24 hours.

The solar wind speed is at 460 km/s with interplanetary magnetic field magnitude of 5 nT. A shock in the solar wind was detected on June 8 around 18:30 UT (18:38 UT at SOHO and 18:29 UT at ACE). DSCOVR data seem to be not available, so we are using a combination of ACE and SOHO, since ACE data are not reliable when the density is very low. The magnetic field jumped from 4 to 10 nT and the solar wind speed from 310 km/s to 380 km/s. It was probably associated with the expected arrival of a weak high speed solar wind stream, probably mixed with an ICME (without clear origin yet). Geomagnetic conditions have reached active levels both locally at Dourbes (from 19:00 UT on July 8 until 01:00 UT on July 9) and at planetary levels (for a 3 hours period starting at 18:00 UT). Unsettled to active conditions can be expected in the next 48 h if the high speed solar wind streams develops further.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 22 stations.

Indices solaires pour 08 Jul 2019

Nombre de Wolf, observé par Catania	012
Flux solaire à 10 cm	067
AK Chambon La Forêt	015
AK Wingst	011
Ap estimé	010
Nombre international de taches solaires estimé	000 - Basé sur 25 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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