Chile’s volcano Puyehue has been spewing ash into the atmosphere for a while now. This ash has travelled thousands of miles and colored sunsets all over the world, including in San Martín de Los Andes in Argentina, as viewed here.
The corrosive and obscuring volcanic ash has grounded airplanes all across South America and even in Australia, but the tiny dust and glass particles are also responsible for an optical effect that has lead to spectacular sunsets and sunrises filled with bright gold, fiery orange, and blood red hues around the globe.
"The wavelength of light coming from the sun is being diffracted differently, and that's what causes the visual effect that we see," explained Jay Miller, a volcanologist at Texas A&M University.
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