Posts by 

Raúl Cortés

Sun

Sun news: How a quiet sun stirs up auroras

Sun news November 3, 2026: Few sunspots, but still auroras? Thank coronal holes! Their fast solar wind can stir Earth’s magnetic field for days.
Sun

Sun activity archive for October 2026

Sun activity archive for October 2026. A daily record of flaring, big filaments and prominences, and other sorts of activity, on our local star.
Sun

Yes, there’s an aurora season, and it’s here

There's an aurora season around the equinoxes, due to the way the magnetic fields of the sun and the Earth work in conjunction with sun-Earth geometry.
Sun

Sun activity archive for September 2026

Sun activity archive for September 2026. A daily record of flaring, big filaments and prominences, and other sorts of activity, on our local star.
Sun

Sun activity archive for August 2026

Sun activity archive for August 2026. A daily record of flaring, big filaments and prominences, and other sorts of activity, on our local star.
Sun

Sun activity archive for July 2026

Sun activity archive for July 2026. A daily record of flaring, big filaments and prominences, and other sorts of activity, on our local star.
Sun

Sun activity archive for June 2026

Sun activity archive for June 2026. A daily record of flaring, big filaments and prominences, and other sorts of activity, on our local star.
Sun

Sun activity archive for May 2026

Sun activity archive for May 2026. A daily record of flaring, big filaments and prominences, and other sorts of activity, on our local star.
Sun

Sun activity archive for April 2026

Sun activity archive for April 2026. A daily record of flaring, big filaments and prominences, and other sorts of activity, on our local star.
Sun

Sun activity archive for March 2026

Sun activity archive for March 2026. A daily record of flaring, big filaments and prominences, and other sorts of activity, on our local star.