Affichage des archives de vendredi, 30 août 2013

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2013 Aug 30 1222 UTC

Prévisions SIDC

Éruptions solaires

Eruptive (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
30 Aug 2013	110	018
31 Aug 2013	111	016
01 Sep 2013	112	017

Bulletin

Solar activity was eruptive featuring 1 C-class flare (C8.3) originating from AR NOAA 11836. A partial halo CME was associated with this flare as seen in LASCO C2 on August 30th around 02:48 UT. It has an angular width of around 150 degrees and an estimated speed of about 1000 km/s. With this speed, the estimated time of arrival at Earth is on August 31th around 21:00. A second partial halo CME was detected by LASCO C2 on August 29th around 06:00 UT. Most material of this CME is southbound, but a shockwave might arrive on Earth. With an estimated speed of around 430 km/s this shockwave is expected to arrive on September 2d around 20:00 UT. The current solar wind speed is around 380 km/s but rising. The interplanetary magnetic field Bz component is turbulent and between -5 nT and -10 nT. Phi is going from 270-360 degrees to 90-180 degrees indicating the arrival of the coronal hole and a current sheet crossing. Geomagnetic conditions where quiet in the past 24 hours, but are expected to reach active (K=4) to minor storm (K=5) levels in the next few hours. During the night of August 31st and September 1st, (with the arrival of the CME as seen by LASCO C2 on August 30th 02:48 UT), geomagnetic conditions can reach active (K=4) to minor storm (K=5) levels.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 047, sur la base de 16 stations.

Indices solaires pour 29 Aug 2013

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	109
AK Chambon La Forêt	005
AK Wingst	002
Ap estimé	002
Nombre international de taches solaires estimé	035 - Basé sur 18 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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