BLUE FLASH OVER IRELAND AT SUNSET


We've all heard of the green flash, the fleeting emerald pulse of light that sometimes appears just above the setting sun. But have you ever heard of the blue flash? Noel Keating photographed one on Feb. 4th from   Rossnowlagh Beach in Ireland:

"Seeing the sun was being distorted by the atmosphere, I quickly set up my camera in hopes of capturing a green flash," says Keating. "Instead, a blue flash appeared! I snapped it as quickly as I could as it would only last little over a second. This is a first for me, I have captured many green flashes throughout the years, but never a blue flash, making these extremely rare here in Ireland."
Blue flashes are formed in the same way as green flashes: a mirage magnifies tiny differences in the atmospheric refraction of red, green and blue light. Blue flashes are generally harder to see than green flashes because blue flashes blend into the surrounding blue sky. When the air is exceptionally clear, however, the blue flash emerges.

Atmospheric optics expert Les  Cowley comments: "Green flashes are rare (unless you live on the California coast where they can be daily events). Blue flashes are very rare indeed. Keating's might be another rarity, a cloud top flash. We are unsure how these form. Rays bent between the cool moist air of a marine cloud deck and warmer air above is a possibility."



Details:
Hoping to film the sunset, I rushed down to the beach only to be late to capture the full event. The Sun had already started to dip below the horizon, seeing the sun was been distorted by the atmosphere I quickly set up the camera in hopes of capturing a green flash instead as conditions were just right. Looking through the live view on the camera when suddenly a blue flash appeared... I snapped it as quickly as I could as it would only last little over a second. This is a first for me, I have captured many green flashes throughout the years, but never a blue flash. making these extremely rare here in Ireland.


Camera Used: NIKON CORPORATION NIKON D5500
Exposure Time: 1/200
Aperture: f/1.0
ISO: 320
Date Taken: 2018:02:04 20:21:39

Taken by Noel Keating on February 4, 2018 @ Rossnowlagh Beach , Co Donegal , Ireland

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