WEEKEND AURORAS
: A solar wind stream hit Earth on Saturday, Feb 21st, and stirred up geomagnetic activity around the Arctic Circle. "It was very quiet until midnight and then the sky lit up with beautiful Northern Lights," reports Sylvain Serre from the Inuit village of Salluit in northern Canada. He snapped this picture using his Canon EOS 30D:http://spaceweather.com/aurora/images2009/20feb09/Sylvain-Serre1_strip.jpg
Photo details: Canon EOS 30D, 16mm fisheye, f2.8, 800 ISO, 3 secThe solar wind stream that triggered the display came from a coronal hole--a magnetic "weak spot" in the sun's atmosphere that allows solar wind to escape into the solar system. The next coronal hole won't turn to face Earth for at least a week, which means Arctic auroras will probably subside until the early days of March. Until then, browse the gallery: 蓝绿色的！遥远的加拿大。
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