Affichage des archives de mercredi, 21 octobre 2015

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2015 Oct 21 1230 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
21 Oct 2015	124	019
22 Oct 2015	122	016
23 Oct 2015	120	008

Bulletin

Five C-class flares occurred during the past period, with NOAA active region 2436 as the main responsible source location. The strongest event was a C6.3 flare peaking at 4:34 UT on October 21. NOAA AR 2436 has developed a delta component in its trailing part. No Earth-directed CMEs were observed. Flaring at the C-level is expected, with an increased chance for an isolated M-class flare, especially from NOAA AR 2436.

The solar wind speed was relatively stable with values below 400 km/s, until about 9 UT. Since 9 UT, the solar wind speed and temperature gradually have increased and the speed reached a maximum of 480 km/s. The magnitude of the interplanetary magnetic field (IMF) went to 13 nT with a fluctuating Bz component between -9 and 11 nT. This is indicative for the start of the expected flow from the equatorial coronal hole. Currently geomagnetic conditions are quiet (K<3) to unsettled (K=3). Up to geomagnetic active (K=4) conditions are expected in the next 24 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 084, sur la base de 09 stations.

Indices solaires pour 20 Oct 2015

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	123
AK Chambon La Forêt	016
AK Wingst	014
Ap estimé	012
Nombre international de taches solaires estimé	094 - Basé sur 19 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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