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 Mirages occur both in spring and winter. Spring mirages appear between April and June, on warm, sunny days with a light northernly breeze. Under such conditions, mirages occasionally appear in which bridge girders seem to be lined up one above the other, creating an illusion reminiscent of Niagara Falls. Light is refracted at the boundary formed between the layer of cold air over the surface of the sea and warmer air above, producing a mirage with a false image appearing above the actual image. Winter mirages appear between December and March and are often visible when the temperature of the air is lower than that of the sea. The scenery on the opposite shore seems stretched or to be floating above the horizon. In a reverse of the phenomenon observed in the spring, the false image appears below the actual image. |
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| Actual Image |  |
| Winter Mirage |  |
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