Affichage des archives de lundi, 19 octobre 2015

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2015 Oct 19 1230 UTC

Prévisions SIDC

Éruptions solaires

M-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
19 Oct 2015	120	007
20 Oct 2015	120	006
21 Oct 2015	120	011

Bulletin

Solar activity was low with only four low level C-class flares (C1.7 being the maximum) from NOAA active regions 2434 and 2436 and 2437. NOAA AR 2437, which had produced a few M-class flares on October 17, has rounded the East limb only producing flares at the C-level during the past period. Catania sunspot region 52 is a new region near S09E12. No Earth- directed CMEs were observed. Flaring activity at the C-level is expected.

The solar wind speed decreased from about 480 km/s to 400 km/s. The magnetic field magnitude currently is about 5 nT with a mainly negative Bz component. Mostly quiet to unsettled geomagnetic conditions were observed, which are expected to continue. There is a chance for a few episodes of active to minor storming conditions due to the moderate speed stream from an equatorial coronal hole, expected to arrive on October 21.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 087, sur la base de 09 stations.

Indices solaires pour 18 Oct 2015

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	120
AK Chambon La Forêt	023
AK Wingst	017
Ap estimé	020
Nombre international de taches solaires estimé	071 - Basé sur 17 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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