In promotion for his 2013 book "Four Blood Moons," Christian minister John Hagee claimed that the tetrad was a sign of the end.
"The coming four blood moons points to a world-shaking event that will happen between April 2014 and October 2015," he said.
The reference to the impact is most direct in Joel 2:30-31, which reads, "And I will show wonders in the heavens and in the earth: Blood and fire and pillars of smoke. The sun shall be turned into darkness, and the moon into blood, before the coming of the great and awesome day of the Lord."
There`s also a reference to a blood moon in Revelation 6:12 -- part of the passage about the Seven Seals -- which reads, "I looked when He opened the sixth seal, and behold, there was a great earthquake; and the sun became black as sackcloth of hair, and the moon became like blood."
Hagee`s assertion was quickly debunked by scientists and skeptics.
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After walking through some of Hagee`s theories -- including the blood moons coinciding with Jewish holidays (which is logical, since Jewish holidays are based on the lunar calendar) and significant events in Jewish history -- Patheos` Bob Seidensticker noted that the minister was vague at some points and credulous at others.
"I predict that John Hagee`s prediction will fail in 2015 and the end will not come," he wrote in late 2013.
The astronomical site EarthSky.org added that tetrads, of which there have been 62 since the first century, follow natural cycles and are easily calculated. Moreover, three of the four most recent eclipses were not visible in Israel itself. ("What good is a blood moon if God`s chosen can`t see it?" wrote Seidensticker.)
Nevertheless, the coming of the September "blood moon" was making folks on Twitter jittery. Some had watched a documentary based on Hagee`s book.
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