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Green beam of light either shooting up or seen immediately after sundown; usually a few degrees long, lasting several seconds. Hazy air and a bright green flash acting as a light source. Sea level. The majority of flashes observed are inferior-mirage or mock-mirage effects, with the others constituting only 1% of reports.
Green flashes can be observed from any altitude (even from an aircraft). They are usually seen at an unobstructed horizon, such as over the ocean, but are possible over cloud tops and mountain tops as well. A green flash from the Moon and bright planets at the horizon, including Venus and Jupiter, can also be observed. [37] [38]
Green flashes and green rays are rare optical phenomena that occur shortly before sunset or after sunrise, when a green spot is visible for a short period of time above the sun, or a green ray shoots up from the sunset point. It is usually observed from a low altitude where there is an unobstructed view of the horizon, such as on the ocean.
Ocean color is the branch of ocean optics that specifically studies the color of the water and information that can be gained from looking at variations in color. The color of the ocean, while mainly blue, actually varies from blue to green or even yellow, brown or red in some cases. [1] This field of study developed alongside water remote ...
Light characteristic. A light characteristic is all of the properties that make a particular navigational light identifiable. Graphical and textual descriptions of navigational light sequences and colours are displayed on nautical charts and in Light Lists with the chart symbol for a lighthouse, lightvessel, buoy or sea mark with a light on it.
'Pon the Mystical Green Flash. Sunset sequence with two green flashes in the second and fourth frames. Green flashes might be observed from any place with a low horizon. Deserts, oceans and ice shelves are probably the best places to observe mirages and therefore green flashes. It is easier not to miss a green flash during sunset than during ...
Bioluminescence. Bioluminescence is the production and emission of light by living organisms. It is a form of chemiluminescence. Bioluminescence occurs widely in marine vertebrates and invertebrates, as well as in some fungi, microorganisms including some bioluminescent bacteria, and terrestrial arthropods such as fireflies.
System A: Red port / green starboard marks when entering from sea into Le Palais, France. comprises Europe, Africa, and most of Asia and Oceania, as well as Greenland. port marks are red and may have a red flashing light of any rhythm except 2+1. starboard marks are green and may have a green flashing light of any rhythm except 2+1.