{"id":119744,"date":"2019-04-30T20:00:17","date_gmt":"2019-04-30T20:00:17","guid":{"rendered":"https:\/\/www.bnreport.com\/heres-what-causes-the-aurora-like-glow-known-as-steve\/"},"modified":"2019-04-30T20:00:17","modified_gmt":"2019-04-30T20:00:17","slug":"heres-what-causes-the-aurora-like-glow-known-as-steve","status":"publish","type":"post","link":"https:\/\/www.bnreport.com\/en\/heres-what-causes-the-aurora-like-glow-known-as-steve\/","title":{"rendered":"Heres what causes the aurora-like glow known as STEVE"},"content":{"rendered":"<p>Were one step closer to understanding the mysterious atmospheric light show called STEVE.<\/p>\n<p>Short for Strong Thermal Emission Velocity Enhancement, <a href=\"https:\/\/www.sciencenews.org\/article\/steve-aurora-makes-its-debut-mauve\" rel=\"noreferrer noopener\" target=\"_blank\">STEVE<\/a> is an unusual type of sky glow that appears closer to the equator than auroras (<em>SN: 4\/14\/18, p. 5<\/em>). Unlike the shimmery green ribbons that make up the northern lights, STEVE consists of a mauve band of light that stretches east to west, sometimes accompanied by a row of vertical green stripes called the picket fence.<\/p>\n<p>Analysis of celestial photos and satellite data reveals that heated atmospheric particles <a href=\"https:\/\/agupubs.onlinelibrary.wiley.com\/doi\/10.1029\/2019GL082460\" rel=\"noreferrer noopener\" target=\"_blank\">produce STEVEs mauve ribbon<\/a>, while electron showers from space create the picket fence, researchers report online April 16 in <em>Geophysical Research Letters<\/em>.<\/p>\n<p>Citizen scientists have been snapping pictures of STEVE events for years, but only now are scientists beginning to understand the atmospheric conditions that create these sky glows, says Don Hampton, a space physicist at the University of Alaska Fairbanks, who wasnt involved in the study. Learning more about such atmospheric processes may help researchers anticipate the effects of space weather on satellite signals, he says.<\/p>\n<p>Space physicist Yukitoshi Nishimura of Boston University and colleagues analyzed data from satellites that passed near two STEVE events in 2008 and 2016. These satellites observed particles and electromagnetic waves in the atmosphere and near-Earth space.<\/p>\n<p>Nishimuras team found that STEVEs purple smear arises from a westward-flowing stream of plasma. Charged particles in the plasma, flowing at about 5 kilometers per second, heat other atmospheric particles through friction and cause these particles to emit purple light. \u201cDifferent [chemical] species in the atmosphere create different colors of glow,\u201d Nishimura says, but the researchers dont yet know which molecules produce this purple light.<\/p>\n<p>\u201cWith the picket fence, the story is a little bit different,\u201d says study coauth<a href=\"https:\/\/www.sciencenews.org\/article\/what-causes-aurora-glow-known-steve\" rel=\"noreferrer noopener\" target=\"_blank\"><strong>Read More \u2013 Source<\/strong><\/a><br \/>\n[contf]<br \/>\n[contfnew]<br \/>\n        <img decoding=\"async\" src=\"https:\/\/www.sciencenews.org\/profiles\/sn\/themes\/science_news\/logo.png\"\/><\/p>\n<h5><a href=\"https:\/\/app.newswirenow.co.uk\/www.sciencenews.org\" rel=\"noreferrer noopener\" target=\"_blank\">science news<\/a><\/h5>\n<p>[contfnewc]<br \/>\n[contfnewc]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Were one step closer to understanding the mysterious atmospheric light show called STEVE.<\/p>\n<p>Short for..<\/p>\n","protected":false},"author":1,"featured_media":119745,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[49],"tags":[],"class_list":["post-119744","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-science"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Heres what causes the aurora-like glow known as STEVE - Business News Report<\/title>\n<meta name=\"description\" content=\"Were one step closer to understanding the mysterious atmospheric light show called STEVE. 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