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FIRST AURORAS OF AUTUMN: How do you know it\'s autumn? Just look at the sky. Near Calgary, Alberta, Harlan Thomas photographed the fall colors on Sept. 23rd:
\"What a way to herald the autumnal equinox!\" says Thomas. \"It was fantastic to see these beautiful auroras with uniquely colored pink pillars.\"
Thomas captured a phenomenon that sky watchers have known about for centuries, but science has only recently understood. Auroras love equinoxes. At this time of year, they can appear even without a geomagnetic storm.
Researchers call it the \"Russell-McPherron effect.\" During the first weeks of autumn, cracks form in Earth\'s magnetic field. Even a slight gust of solar wind can slip through to spark a light show. This is exactly what happened on Sept. 23rd in Alberta. Happy Autumn! Aurora alerts: SMS Text.
https://spaceweather.com/
\"What a way to herald the autumnal equinox!\" says Thomas. \"It was fantastic to see these beautiful auroras with uniquely colored pink pillars.\"
Thomas captured a phenomenon that sky watchers have known about for centuries, but science has only recently understood. Auroras love equinoxes. At this time of year, they can appear even without a geomagnetic storm.
Researchers call it the \"Russell-McPherron effect.\" During the first weeks of autumn, cracks form in Earth\'s magnetic field. Even a slight gust of solar wind can slip through to spark a light show. This is exactly what happened on Sept. 23rd in Alberta. Happy Autumn! Aurora alerts: SMS Text.
https://spaceweather.com/