Last night, a shock wave in the solar wind hit Earth's magnetic field, sparking a G2-class geomagnetic storm and rare "electric blue" auroras.
Space Weather News for April 20, 2018
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INTERPLANETARY SHOCK WAVE: Last night, April 19-20, a shock wave in the solar wind hit Earth's magnetic field, sparking a moderately strong G2-class geomagnetic storm and rare "electric blue" auroras seen from airplanes in flight over Canada. Northern Lights spilled across the Canadian border into a number of US states. Visit today's edition of Spaceweather.com for photos and a discussion of this unexpected event.
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Above: Blue auroras photographed by pilot Matt Melnyk flying an airplane 39,000 feet over Canada on April 20th. More pictures may be found in Spaceweather.com's Realtime Aurora Gallery.
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