Paris, 22 October 2014

Understanding and predicting solar flares

Researchers from the Centre de Physique Théorique (CNRS/École polytechnique) and the Laboratoire Astrophysique, Interprétation - Modélisation (CNRS/CEA/Université Paris Diderot) have identified a key phenomenon in the triggering of solar flares. Using satellite data and models, the scientists were able to monitor the evolution of the solar magnetic field in a region with eruptive behavior. Their calculations reveal the formation of a magnetic rope1 that emerges from the interior of the Sun and is associated with the appearance of a sunspot. They show that this structure plays an important role in triggering the flare. By characterizing the transition to the flare, their work opens the way to forecasting the solar storms that impact the Earth, and makes the cover story of Nature dated October 23.

To download the press release : Eruptions solaires


1A magnetic rope is a tangle of magnetic field lines twisted together like a hemp rope.


Characterizing and predicting the magnetic environment leading to solar eruptions, Tahar Amari, Aurélien Canou and Jean-Jacques Aly, Nature, 23 October 2014.


CNRS researcher l Tahar Amari l T +33 (0)1 69 33 42 52 l
CNRS press office l Lucie Debroux l T +33 (0)1 44 96 51 51 l


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