Home    Rays & Shadows   Water Droplets     Clouds & Fog     Droplets & Light     Corona          Ringed Moon         Formation        Colours        Droplet sizes        Bishop's ring        Pollen Corona        Image index     Iridescent Clouds     Fogbow     The Glory     Heiligenschein     IRIS software   Rainbows   Ice Halos   High Atmosphere   Links & Resources   Search - Index                             123456789012345678		Bishop's ring
		Bishop's ring imaged by Marko Riikonen (site) at Vuontisjarvi, Finland on 1st May 1992. Image ©Marko Riikonen, shown with permission. A large and faint bluish aureole edged by a yellow and red surrounds the sun . This is a "Bishop's ring". This corona like effect is produced by the scattering of sunlight by ash and hydrated sulfate droplets in the stratosphere resulting from the eruption of Mount Pinatubo in 1991. The particular features of the Bishop's ring arise from the narrow size range of the particles which are about 1µm (1/1000 mm) in diameter. More Bishop's rings 1,2. Sunsets and volcanic ash.