Interplanetary Shock Wave Sparks Electric-Blue Auroras

Space Weather News for April 20, 2018 http://spaceweather.com https://www.facebook.com/spaceweatherdotcom 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. Remember, SpaceWeather.com is on Facebook! 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. Share Tweet Forward Copyright © 2018 Spaceweather.com, All rights reserved.