Recent Examples of noctilucent cloud from the Web
The first time people reported noticing noctilucent clouds was in 1880s after the massive eruption of Krakatau, a volcano in Indonesia.
What caught my eye, and the eyes of several other meteorologists, was the idea that these could be noctilucent clouds, instead.
People living in high latitude areas (between 45º and 70º above or below the Equator) have the best chance of seeing noctilucent clouds.
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Learn More about noctilucent cloud
Britannica.com: Encyclopedia article about noctilucent cloud
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