An unusual mirage was observed in a national park in Alaska. The footage was filmed in Glacier Bay National Park and Preserve.
Park posted the video on his Facebook page and explained that the mirage is called Fata Morgana. Fata Morgana is a mirage that appears just above the horizon and can significantly distort an already existing object.
Glacier Bay National Park and Preserve explained on Facebook: "Fata Morgana is a mirage seen in a narrow strip on the horizon of the Earth."
"The islands in the glacial bay turn into a flying Dutchman when air of different densities meets, the air in the Earth's atmosphere acts as a refractive lens, creating the mirage effect that we see. Cool, calm air often forms near the surface of the water - then, if warm dense air presses on cool air at the surface, a lens is formed."
The Fata Morgana Mirage appeared on a warm sunny day, but it is not claimed that this phenomenon is characteristic only of the summer months. This type of mirage can be seen on land or at sea and can include almost any kind of distant object, such as a boat or a coastline.