MSGID: 1:317/3 62bc9357   
   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.   
      
      
    Solar Halo Over Torres Vedras, Portugal   
      
      June 29, 2022   
      
       Solar-Halo   
      
      Photographer:  Paulo P. Pereira   
      
      Summary Authors:  Paulo P. Pereira;  Cadan Cummings   
      
      The photo above features a  22-degree solar halo spotted near   
       Torres Vedras, Portugal on March 13, 2022. At first glance through   
      a window, I saw what looked like an upside-down rainbow. When I went   
      outside to photograph it, I realized it was a solar halo.   
      
       Halo phenomena appear when randomly oriented  ice crystals   
      composing cirrus clouds reflect and refract incoming sunlight. The name   
      of the halo (22 degrees) denotes the angle in which the ice crystals   
      bend the incoming light to create this colorful and vibrant circular   
      effect. In total, this halo remained visible for over half an hour.   
      
      Photo details: Canon EOS RP, RF 24-105mm, f/13, 1/800 second exposure,   
      ISO-100, 24mm   
        * Torres Vedras, Lisboa, Portugal Coordinates: 39.0918, -9.2600   
      
   Related EPODs   
      
       Solar Halo Over Torres Vedras, Portugal  Glory Observed Above   
      Sicily, Italy  Rainbow Flashes  Solar Halo Above Eastern Slovakia   
       Multicolored Aurora Over Finland  Supernumerary Rainbow Over   
      Modica, Italy   
       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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