MSGID: 1:317/3 63a5ed39   
   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.   
      
      
    Halo Display Observed from Graubunden, Switzerland   
      
      December 23, 2022   
      
      
       Sean_4C5DBEC2-262F-4278-8E95-33DAF507563E   
      
      Photographer:  Sean Lybrand   
      Summary Author:  Sean Lybrand   
      
      Shown above is a portion of  halo display I had the pleasure to   
      observe over the Swiss Alps on October 11, 2022.  Ice crystals in   
      clouds or free falling through the atmosphere can create a medley of   
      beautiful halos; some very obvious and some quite faint.   
      
      Conspicuous here are the  22-degree halo, both  sundogs or   
      parhelia, the  parhelic circle, the upper  tangent arc (tangent   
      to the 22-halo) and the suncave  Parry arc (just above the upper   
      tangent arc). Not nearly as evident are the rarely seen upper and lower   
       Lowitz arcs (in the vicinity of the parhelia).   
      
      
      Sent, Graubunden, Switzerland. Coordinates: 46.81016, 10.34032   
      
      
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   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?   
      
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      Earth Science Picture of the Day is a service of the  Universities   
      Space Research Association.   
      
   https://epod.usra.edu   
       
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