Did sunscreen help ancient humans when Earth’s magnetic field grew dangerously thin some 41,000 years ago? EarthSky’s Will Triggs speaks with scientist Agnit Mukhopadhyay about that two-millennia period when Earth’s magnetic poles went wandering. Watch in the player above or on YouTube.| EarthSky
Sun news February 28. Just arrived! Photos of last night’s dancing aurora | EarthSky
Solar radiation storms occur when a large-scale magnetic eruption, often causing a coronal mass ejection and associated solar flare, accelerates charged particles in the solar atmosphere to very high velocities. The most important particles are protons which can get accelerated to large fractions of the speed of light. At these velocities, the protons can traverse the 150 million km from sun to Earth in just 10’s of minutes or less. When they reach Earth, the fast moving protons penetrate t...| www.swpc.noaa.gov