EPOD - a service of USRA

The Earth Science Picture of the Day (EPOD) highlights the diverse processes and phenomena which shape our planet and our lives. EPOD will collect and archive photos, imagery, graphics, and artwork with short explanatory
captions and links exemplifying features within the Earth system. The
community is invited to contribute digital imagery, short captions and
relevant links.


Crepuscular Rays in the Philippines and Rainbow Wheel Over Belgium

March 11, 2022


IMG20210701183359

Arc-en-ciel-30mar2018-soir(1)

Photographers: Joaquinna Reigne P. Barbosa (top); Thierry
Lombry (bottom)

Summary Author: Joaquinna Reigne P. Barbosa; Thierry Lombry;
Cadan Cummings

The top photo features crepuscular rays visible behind clouds at
sunset on Boracay Island, Philippines. Crepuscular Rays, also known
as “God rays”, are sunbeams that usually appear during sunrise or
sunset. The rays form when the Sun passes behind a cloud or
landform on the horizon, and a portion of the light shines between the
gaps. These sunbeams are emphasized when there is dust, smoke, and
other small particles in the atmosphere due to increased Rayleigh
scattering of incoming sunlight. This photo was taken on July 1, 2021.

In contrast, the bottom photo taken near Namur, Belgium on March 30,
2018 shows sunbeams emanating from the horizon near a rainbow.
Atmospheric optics events can either originate from the horizon near
the Sun or at the antisolar point opposite the Sun. Since rainbows
always arise at the point in the sky directly opposite the Sun, these
sunbeams are an excellent example of anti-crepuscular rays often
called a rainbow wheel. The phenomenon was named because the rays
appear like spokes of a wheel formed with the primary and secondary
rainbows. Both the crepuscular and anti-crepuscular rays in the images
above appear to diverge from the horizon due to perspective.
* Boracay Island, Philippines Coordinates: 11.9674, 121.9248
* Namur, Belgium Coordinates: 50.4649, 4.8651

Related EPODs

Crepuscular Rays in the Philippines and Rainbow Wheel Over Belgium
Snow Halo Over Mala Fatra Mountains Atmospheric Optics Observed
in Fog Archive - Picket Fence Aurora Inferior Mirage In
Venetian Lagoon Anticrepuscular Rays Over the Ionian Sea
More...

Atmospheric Effects Links

* Atmospheric Optics
* Optic Picture of Day: Gruppo Astrofili Galileo Galilei
* Color and Light in Nature
* The Colors of Twillight and Sunset
* Refraction Index
* Image Gallery: Atmospheric Effects
* What is a Rainbow?

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Earth Science Picture of the Day is a service of the Universities
Space Research Association.

https://epod.usra.edu

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