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View at EarthSky Community Photos. | Angie Reagan in South Lake Tahoe, California, captured this picture on April 9, 2023. Angie wrote: “I used to be ready for this to show right into a rainbow, however I later realized from my buddy, Amheric, that that is truly a fogbow and even perhaps extra particular. On this day, it was simply the supply of sunshine I wanted.” Thanks, Angie!
A fogbow, or white rainbow
Fogbows additionally go by the names white rainbow, cloudbow or ghost rainbow. They’re made a lot as rainbows are, from the identical configuration of daylight and moisture. Rainbows occur when the raindrops fill the air. You at all times see a rainbow within the route reverse the sun. Fogbows are a lot the identical, at all times reverse the sun. However the small droplets inside a fog or cloud create fogbows as in comparison with bigger raindrops that create rainbows.
Search for fogbows in a skinny fog when the sun is shiny. You would possibly see one when the sun breaks by way of a fog. Or look ahead to fogbows over the ocean.
As a result of the water droplets in fog are so small, fogbows have solely weak colours or are colorless.
Look away from the sun and at an angle of 35-40 degrees out of your shadow, which marks the route of the antisolar point [point directly opposite the sun]. Some fogbows have very low distinction, so search for small brightenings within the misty background. As soon as caught, they’re unmistakable.
The sun should be lower than 30-40 levels excessive, until you’re on a hill or excessive up on a ship the place you possibly can see the mist and fogbow from above.
Fogbows are enormous, virtually as giant as a rainbow and far, a lot broader.
View at EarthSky Community Photos. | Cecille Kennedy in Newport, Oregon, caught this picture of a fogbow on July 16, 2021. She wrote: “What seems like a white rainbow on this picture is a pure phenomena brought on by fog. Thus it’s known as a fogbow. It seems white as a result of the water droplets are a lot tinier than your common raindrop … Yaquina Head Light is within the higher proper. At 93 toes [28 meters], it’s the tallest lighthouse in Oregon. The flowers are fireweed, so named due to their propensity to develop following fires. They’re prevalent alongside the Oregon coast.” Thanks, Cecille!View at EarthSky Community Photos. | Gene Peck in Hollywood Seaside, California, captured this fogbow on October 31, 2020. He mentioned “I used to be taking a morning stroll in a transparent sunny sky with an offshore fog financial institution. Inside 20 minutes the fog moved in, enveloping the seaside. I took this going through north-northwest, The fogbow lasted solely a minute or 2, earlier than the fog started dissipating.”View at EarthSky Community Photos. | Sheryl R. Garrison caught this bow in Alberta, Canada, on October 26, 2020. Cloudbow or fogbow? Les Cowley of Atmospheric Optics informed us: “Technically it’s a cloudbow or fogbow. They’re precisely the identical phenomenon. However cloudbows seem in skies when there isn’t a apparent floor degree fog [as in this photo]. These bows with pastel colours and a white middle want small water droplets in comparison with the bigger raindrops of rainbows. The drops are suspended in humid air. You’ll be able to typically see these bows when the air is freezing if the water drops stay supercooled and don’t freeze.”
Extra fogbow images
View at EarthSky Community Photos. | Peter Lowenstein caught this fogbow in Mutare, Zimbabwe, on April 29, 2020. He wrote: “Half an hour after the sun rose behind my home, an exquisite fogbow developed in the course of a misty morning view from my entrance veranda. All of the circumstances have been proper, shiny sunshine from the rear with the sun lower than 20 levels above the horizon and clearing clouds of mist on the antisolar point. The scene was framed by an exquisite flowering poinsettia to the left, a lush banana grove to the suitable, and clear blue sky starting to look on prime!”View at EarthSky Community Photos. | Alan Nicolle in New South Wales, Australia, captured this picture on July 16, 2019. He wrote: “I used to be out geocaching within the outskirts of Broken Hill, after I turned again to see this fogbow growing. I took fairly a couple of images with the iPhone, and rode again to the automotive on my bike. However, by the point I received again to the automotive to make use of my SLR, it had pale.” Thanks, Alan!Greg Diesel Walck Photography wrote in October 2015: “Noticed my first fogbow/white rainbow. Picture taken with cellphone. Moyock, North Carolina.” Thanks, Greg!
Backside line: A fogbow appear like a white or colorless rainbow. They seem reverse the sun. Look ahead to them in a skinny fog, when the sun is shiny. You would possibly see one when the sun breaks by way of a fog. Or look ahead to fogbows over the ocean.
Deborah Byrd created the EarthSky radio collection in 1991 and based EarthSky.org in 1994. At present, she serves as Editor-in-Chief of this web site. She has gained a galaxy of awards from the broadcasting and science communities, together with having an asteroid named 3505 Byrd in her honor. A science communicator and educator since 1976, Byrd believes in science as a power for good on this planet and an important software for the twenty first century. “Being an EarthSky editor is like internet hosting an enormous international get together for cool nature-lovers,” she says.
