Mark Biltz is the pastor of El Shaddai Ministries in Tacoma, Washington, a Hebrew Roots congregation. Mark is known for his 2008 theory on the four blood moons or tetrad of 2014-2015 that made a resurgence in 2013. He is also the author of Blood Moons: Decoding the Imminent Heavenly Signs.
Mark Biltz's Claim to Fame
Mark Biltz came to notoriety in 2008 when he appeared in what turned out to be a viral video. He was interviewed on Prophecy in the News by the late J. R. Church and Gary Stearman. In that interview he shared his discovery in the NASA eclipse tables of a rare tetrad of four blood moons falling on the spring and fall Jewish holy day seasons of both 2014 and 2015.
In the interview he postulated that perhaps this rare sign in the heavens would herald the Second Coming of Jesus (for 2015). As 2015 neared, he backed off that idea. Now the popular expectation is that the tetrad heralds something significant for Israel because of past tetrads happening in the same years when other significant events happened for Israel or the Jews (1492, 1948, 1967).
In 2014 he released his own book on the tetrads called Blood Moons: Decoding the Imminent Heavenly Signs.
Four Blood Moons Theory Debunked
If you are wondering about Biltz's theory and whether to expect anything in 2014 or 2015 because of the tetrad, read this article explaining the fundamental problems with it based on my own experience with looking for blood moons in NASA data before 2008.