MSGID: 1:317/3 631cd0e4   
   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.   
      
      
    Twilight Comparison at Curitiba, Brazil, Before and Post Eruption of   
   Hunga Tonga   
      
      September 09, 2022   
      
       Ep2016-07-07 e 2022-06-12 - Sol a -11 graus   
      
      Photographer:  Fabiano Belisário Diniz   
      Summary Author:  Fabiano Belisário Diniz   
      
      Shown above is a dramatic comparison between a normal twilight and a   
       volcanic twilight as observed from Curitiba, Brazil, on July 7,   
      2017 (top) and on June 12, 2022 (bottom).  Ash from the  Hunga   
      Tonga volcano played a major role in enhancing the  dusk colors on   
      the 2022 photo. Note that both photos were taken when the sun was 11   
      degrees below the horizon in Curitiba. Many places in the southern   
      hemisphere, and elsewhere, have been experiencing particularly   
       colorful twilights since late January, some two weeks after the   
      eruption.   
      
      Photo details: Although both photos show the same stage of twilight   
      (sun at -11 degrees), the city lights appear fainter in the bottom   
      photo because I used a graduated filter with the dark portion facing   
      down.   
      
      
      Curitiba, Brazil Coordinates: -25.4372, -49.2700   
      
   Related EPODs   
      
       Twilight Comparison at Curitiba, Brazil, Before and Post Eruption   
      of Hunga Tonga  Pollen and Flying Seeds  Volcanic Sunsets   
      Observed from Mutare, Zimbabwe in 2022  Distortion of the Setting   
      Moon and Lower Mock Mirage  Fogbow Observed from the Ground and from   
      a Tower  Atacama Desert and Volcanic Twilight   
       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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