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- Aug 7, 2001
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Two full moons in a month seems to be the current usage, but there's another which I prefer -
Sometimes a major volcanic eruption puts huge amounts of dust into the atmosphere; this can literally cause a Blue Moon (as well as spectacular sunsts, etc). Such eruptions are rare - hence 'Once in a Blue Moon'.
Sometimes a major volcanic eruption puts huge amounts of dust into the atmosphere; this can literally cause a Blue Moon (as well as spectacular sunsts, etc). Such eruptions are rare - hence 'Once in a Blue Moon'.