Affichage des archives de mercredi, 24 août 2016

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2016 Aug 24 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
24 Aug 2016	081	020
25 Aug 2016	081	015
26 Aug 2016	081	007

Bulletin

Solar activity has been very low. The previously growing region 2579 stabilized and became inactive. The only flare of the period was a B2.5 flare peaking at 8:56UT from region 2580. Solar X-ray flux is expected to remain below C level. Solar proton fluxes are at background levels and expected to remain so. No Earth directed CME's have been observed in coronagraph data.

In the first half of the reporting period solar wind showed a further increase in total magnetic field to over 13nT and an extended period of pronounced negative values of the southward magnetic field down to -13nT. In addition also solar wind speed increased steadily to over 600 km/s with peaks up to 700 km/s marking the expected arrival of the coronal hole high speed stream. Meanwhile, total magnetic field has declined to nominal values with Bz becoming variable while the solar wind speed remains elevated in the 500-600 km/s range. Over the next 24-48 hours we should see the decline of solar wind speed to nominal values.

Geomagnetic conditions reached minor storm levels (K Dourbes 5 for only an isolated period, while NOAA Kp=5 for three consecutive periods) around midnight, following the prolonged duration of pronounced negative Bz combined with the increase in solar wind speed. Over the morning, geomagnetic conditions have recovered to quiet to unsettled as magnetic field values decreased. As solar wind speed remains enhanced isolated periods of active conditions remain possible.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 050, sur la base de 20 stations.

Indices solaires pour 23 Aug 2016

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	081
AK Chambon La Forêt	041
AK Wingst	021
Ap estimé	020
Nombre international de taches solaires estimé	046 - Basé sur 36 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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