“Astronomy picture of the day” featured amazing video of wonderful aurora display over Ravnastua, Skoganvarre and Lakselv in Norway, captured by Christian Mülhauser.
Auroras are occurring again with increasing frequency. With the Sun being unusually dormant over the past four years, the amount of Sun-induced auroras has been unusually low. More recently, however, our Sun has become increasingly active and exhibiting a greater abundance of sunspots, flares, and coronal mass ejections. Solar activity like this typically expels charged particles into the Solar System, some of which may trigger Earthly auroras. A solar storm precipitated the above timelapse displays of picturesque auroras above Ravnastua, Skoganvarre and Lakselv, Norway. Curtains of auroral light, typically green, flow, shimmer and dance as energetic particles fall toward the Earth and excite air molecules high up in the Earth’s atmosphere. With solar maximum still in the future, there may be even better opportunities to see spectacular auroras personally over the next few years. (APOD)
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