Affichage des archives de mercredi, 21 mai 2014

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2014 May 21 1227 UTC

Prévisions SIDC

Éruptions solaires

Eruptive (C-class flares expected, probability >=50%)

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
21 May 2014	121	006
22 May 2014	121	016
23 May 2014	121	007

Bulletin

There were two C flares during the past 24 hours. The brightest flare was a C2.3 flare released by NOAA AR 12071, peaking at 01:38 UT on May 21. LASCO C2 and C3 and STEREO COR2 A and B observed a bright CME probably associated to this flare. There is a slight chance for a glancing blow from this CME on May 24. In the next 48 hours, more C flares are likely, especially from NOAA AR 12071, 12072, and 12066. Over the last 24 hours, solar wind speed as observed by ACE gradually declined from 350 to 320 km/s, while the magnitude of the Interplanetary Magnetic Field (IMF) varied between 2 and 5 nT. Over the past 24 hours, geomagnetic conditions were quiet (K Dourbes between 0 and 2; NOAA Kp between 0 and 1). Quiet geomagnetic levels (K Dourbes < 4) are expected on May 21 and 23. As an effect of an expected sector boundary crossing to a negative phi angle (toward) and the high speed stream associated to a weak southern coronal hole, there is a chance for active geomagnetic conditions (K Dourbes = 4) on May 22.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 058, sur la base de 17 stations.

Indices solaires pour 20 May 2014

Nombre de Wolf, observé par Catania	089
Flux solaire à 10 cm	117
AK Chambon La Forêt	007
AK Wingst	005
Ap estimé	004
Nombre international de taches solaires estimé	061 - Basé sur 26 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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