This sign will occur at the relative beginning of the 70th Week, concurrent with the sealing of the 144,000 of every tribe of Israel. This sign is a physical manifestation that every living soul on the earth on that day will experience. For the left behind potential gentile Tribulation Saints this sign needs to be made known to them so that when it does occur it will be an important indicator that their salvation draweth nigh also. That is the ultimate purpose of this blog item.
To contemplate what incredible yet largely ignored global dynamic forces will be withheld from occurring by angelic power should absolutely boggle your mind.
On the day as the 144,000 are being sealed the prophecy of Revelation 7:1 occurs:
"After these things I saw four angels standing at the four corners of the earth, holding the four winds of the earth, that the wind should not blow on the earth, on the sea, or on any tree."
And then an angel will rise from the east and the sealing of the 144,000 will commence and so will their ministry.