Affichage des archives de vendredi, 1 août 2014

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2014 Aug 01 1232 UTC

Prévisions SIDC

Éruptions solaires

Active (M-class flares expected, probability >=50%)

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
01 Aug 2014	163	009
02 Aug 2014	167	018
03 Aug 2014	170	006

Bulletin

There are currently 9 sunspot groups visible. Fast growing NOAA 2132 produced the strongest event of the period: a C8 flare peaking at 00:18UT. Together with NOAA 2130, which produced only low-level C-class flares, they are magnetically the most complex active regions on the solar disk. NOAA 2127 simplified, and remained quiet. A small filament on the northern hemisphere near the central meridian (CM) erupted. Evaluation of any associated CME is pending the availability of coronagraphic images. The other filaments have been stable. No Earth-directed CMEs were observed over the last 24 hours. There remains a chance for an M-class flare, in particular from NOAA 2130 and 2132. In response to the sector boundary crossing from 31 July around 11:00UT (ACE), solar wind speed gradually increased from 300 to 350 km/s, with Bz varying between -8 and +10 nT. Geomagnetic conditions were quiet, with locally some unsettled periods towards the end of the reporting window. A small equatorial coronal hole is transiting the CM and may influence the geomagnetic field on 4 August. Quiet geomagnetic conditions are expected until the possible glancing blow from the 30 July CME, which may locally lead to active geomagnetic conditions on 2 August.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 125, sur la base de 12 stations.

Indices solaires pour 31 Jul 2014

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	156
AK Chambon La Forêt	009
AK Wingst	008
Ap estimé	005
Nombre international de taches solaires estimé	/// - Basé sur /// 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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