The green flash is a rare, brief optical event of green, yellow, and sometimes blue that colors the horizon, occurring at sunrise or sunset most often in the western U.S. Refraction and dispersion ...

This is the "green flash," which can sometimes be seen right after sunset or before sunrise. So what causes the green flash? Like many colorful spectacles in the sky, such as rainbows, the green ...

There are very special cases, when the sky is very clear and exceptionally transparent, that a green flash can be glimpsed ... colors seen at sunrise and sunset. But there are very special cases ...

Green flashes are only observable during sunrise and sunset, as they appear when the last sliver of sun seems to be peeling away from the horizon line. They are usually seen over large bodies of ...

One of those things, it turns out, is the green flash, an atmospheric optical feature ... the green and sometimes blue light can appear at sunset right on the upper curve of the sun as it sets ...

THE explanation of the bluish (?) green flash of light sometimes seen at sunset given in your note last week (p. 495) does not seem to me to be a sufficient explanation of all the observations.