Affichage des archives de vendredi, 2 octobre 2015

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2015 Oct 02 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

Warning condition (activity levels expected to increase, but no numeric forecast given)

	Flux de 10 cm	Ap
02 Oct 2015	110	013
03 Oct 2015	110	008
04 Oct 2015	110	013

Bulletin

A dozen of C- and two M-class flares were observed, mainly originating from NOAA active region (AR) 2422. The strongest flares were the M4.5 and M5.5 flares, peaking at 13:10 UT (October 1) and 00:13 UT (October 2). Though it is difficult to investigate the properties of NOAA 2422 when approaching the West limb, it still retains its delta spots. NOAA AR 2420 and 2427 remained beta regions. No Earth-directed CMEs were observed. Flaring activity at the M-level is expected. We retain a warning condition for a proton event in case of more strong activity originating from NOAA AR 2422.

The solar wind speed was low (with values in the range of 340 to 400 km/s). The interplanetary magnetic field magnitude remained around 10 nT, with a maximum of 13 nT, and while the Bz component went down to -11 nT. The phi angle was mainly negative (towards) till 23 UT when it turned to a positive (away) orientation. The geomagnetic conditions were quiet (K<3) to unsettled (K=3), with a few time slots of active conditions (K=4) between 15 and 24 UT. Quiet to unsettled conditions are expected to continue, with a few time slots of active conditions.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 061, sur la base de 19 stations.

Indices solaires pour 01 Oct 2015

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	120
AK Chambon La Forêt	027
AK Wingst	014
Ap estimé	014
Nombre international de taches solaires estimé	090 - Basé sur 29 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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