MSGID: 1:317/3 62c32ae7   
   PID: hpt/lnx 1.9.0-cur 2019-01-08   
   TID: hpt/lnx 1.9.0-cur 2019-01-08   
    EPOD - a service of USRA   
      
   The Earth Science Picture of the Day (EPOD) highlights the diverse processes   
   and phenomena which shape our planet and our lives. EPOD will collect and   
   archive photos, imagery, graphics, and artwork with short explanatory   
   captions and links exemplifying features within the Earth system. The   
   community is invited to contribute digital imagery, short captions and   
   relevant links.   
      
      
    Northern Lights Take Center Stage Over Central Alaska   
      
      July 04, 2022   
      
       JohnC_IMG_3998Chumack032722HRweb (004)   
      
       JohnC_IMG_4020ChumackHRweb (004)   
      
      Photographer:  John Chumack   
      
      Summary Author:  John Chumack;  Jim Foster   
      
      Featured above are photos of  auroras I captured while teaching my   
      annual  Aurora Workshop in Alaska earlier this year. After a   
      two-year shutdown due to pandemic concerns, we finally received   
      clearance to go north again. It was worth the wait! I have to say that   
      these were some of the best auroras I’ve seen in 32-years of observing   
      them.   
      
       Northern lights or auroras occur whenever the energized particles   
      that makeup the  solar wind interact with  oxygen and nitrogen   
      molecules in the Earth’s upper atmosphere (at least 50 miles or 80 km   
      above the surface). The key is that the Sun has to be sufficiently   
      active to generate solar wind streams that reach the Earth’s orbit.   
      Photos taken in late March 2022.   
        * Chena Hot Springs, Alaska Coordinates: 65.0518, -146.0510   
      
   Related EPODs   
      
       Northern Lights Take Center Stage Over Central Alaska  Solar   
      Halo Over Torres Vedras, Portugal  Glory Observed Above Sicily,   
      Italy  Rainbow Flashes  Solar Halo Above Eastern Slovakia   
       Multicolored Aurora Over Finland   
       More...   
      
   Atmospheric Effects Links   
      
        *  Atmospheric Optics   
        *  Optic Picture of Day: Gruppo Astrofili Galileo Galilei   
        *  Color and Light in Nature   
        *  The Colors of Twillight and Sunset   
        *  Refraction Index   
        *  Image Gallery: Atmospheric Effects   
        *  What is a Rainbow?   
      
   -   
      Earth Science Picture of the Day is a service of the  Universities   
      Space Research Association.   
      
   https://epod.usra.edu   
       
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