These eruptions have led to extremely rapid coronal mass ejections, at speeds in excess of 1500 kilometres/second, accompanied by a flux of energetic particles. While none of them was directed towards the Earth this time, this could change for farther outbursts in the days to come, as the sunspots which are the seat of this phenomenon approach the centre of the solar disc.
Astronomers at the Observatoire de Paris, members of the Laboratoire d’Études Spatiales et d’Instrumentation en Astrophysique  at Meudon, who are specialists in solar physics, are following closely the day star’s regain of activity. They are currently able to use their dedicated ground-based instruments, in particular those on the Meudon site (Hauts-de-Seine) of the Observatoire de Paris, and also to exploit the pictures taken in the extreme ultra-violet domain by NASA’s SDO/AIA satellite, as well as the light curves recorded in X-rays by the American meterological satellite GOES. The up-coming ESA Solar Orbiter mission will enable us to identify how these eruptions propagate through the interplanetary medium.
See the film of the four solar flares, prepared by Observatoire de Paris’ researchers, with SDO images :
- Eruption sur le Soleil
- En deux jours, notre étoile a émis quatre bouffées intenses, les 13, 14 et 15 mai 2013. Voici l’une d’elles photographiée en ultraviolet extrême par le satellite Solar Dynamics Observatory.
(Nasa / SDO / AIA)
- Courbe de lumière X
- Cette courbe de lumière montre les quatre pics d’émission en rayons X enregistrés par le satellite météo américain Geostationary Operational Environmental Satellite GOES.
See the December 20 2012 press release which indicates that Earth dwellers have no reason to fear a global catastrophe.
 The Laboratoire d’Études Spatiales et d’Instrumentation en Astrophysique LESIA is a science department of the Observatoire de Paris. It is associated with the CNRS, with the Pierre and Marie Curie university, and with the Paris Diderot university.
Observatoire de Paris
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Dernière modification le 6 janvier 2014