EQUINOX CRACKS IN EARTH'S MAGNETIC FIELD: The northern autumnal equinox is less than a week away. As a result "equinox cracks" are opening in Earth's magnetic field, allowing solar wind to penetrate our planet's magnetosphere. Visit today's edition of Spaceweather.com to learn about these seasonal cracks and how they can supercharge Arctic auroras.
Above: The equinox crack phenomenon was on display last night in the Finnish Lapland as a bright ribbon of auroras bisected the sky over Rovaniemi, Finland. Photo credit: Alexander Kuznetsov. Browse Spaceweather.com's Realtime Aurora Gallery for more examples.
