The Father's name is written, as the seal on the 144,000's, foreheads where others could see it.
The sealing of the 144,000 is not the Sealing of the Holy Spirit, that believers are sealed, but it is the Sealing at the hand of Angels.

        Jesus referred to it in Matthew 24:31.
We have an intermission in the breaking of the Seals that God's elect of Israel may be Sealed.

         There will be a 'remnant according to the election of grace' and God will reserve 144,000 of Israel who during the Tribulation Period will not bow their knee to the Antichrist.
The Interval Between the Sixth and Seventh Seals
The sealing of the 144,000.
Revelation 7:1-8

"And after these things I saw four angels standing on the four corners of the earth, holding the four winds of the earth, that the wind should not blow on the earth, nor on the sea, nor on any tree.
And I saw another angel ascending from the East, having the Seal of the Living God: and he cried with a loud voice to the four angels, to who it was given to hurt the earth and the sea, Saying, Hurt not the earth, neither the sea, nor the trees, till we have sealed the servants of our God in their foreheads.
And I heard the number of them which were sealed: and there were sealed a hundred and forty and four thousand of all the tribes of Israel.
It is interesting to compare Jesus' "Olivet Discourse" of  Matthew 24:1-30 with the "Six Seals" of Revelation 6:1-17.

        The similarities are striking and proves the author of the discourse knew of the things that were to come to pass in the "Day of the Lord."

                 This is evidence of Jesus' deity.
Instead of repenting and crying for Salvation, the people will call on the mountains and rocks to bury them from the sight of the Almighty.
All the physical changes will cause a fear to fall on all men who will no long attribute the changes to natural law, but will see the 'hand of the Almighty' in it.

         To them the "Day of Judgment" will become a reality and in fear and terror they will hide themselves in the dens and rocks  of the mountains saying, "Fall on us and hide us from the face of Him that sits on the throne, and from the wrath of the Lamb, for the Great Day of His wrath is come, and who shall be able to stand?"
These physical convulsions will be the earth's 'travail pains' as she labors to bring forth the New Creation of the Millennial Age.

          Jesus said in Matthew, "In those days shall the sun be darkened (that is, its light obscured) and the moon shall not give her light, and the stars shall fall from heaven, and the powers of the heavens (the principalities and powers of the heavenly places, not the Powers and Kingdoms of the Earth), shall be shaken."
Also in Isaiah it says, "All the host of heaven (the stars) shall be dissolved and the heavens shall be rolled together as a scroll; and all their host shall fall down, as the leaf falleth from the vine, and as falling fig from the fig tree."

         These corresponds to the stars of heaven of this seal and probably refers to our atmosphere and to meteors and shooting stars similar to those we have seen periodically.
Isaiah's prophecy says, Behold the Day of the Lord cometh, cruel both with wrath and fierce anger, to lay the land desolate and He shall destroy the sinners thereof out of it.

         For the stars of heaven and the constellations thereof shall not give their light, the sun shall be darkened in his going forth, and the moon shall not cause her light to shine.
Joel's prophecy says that God will show wonders in the heaven and in the earth, blood and fire, and pillars of smoke.

           And that the sun shall be turned to darkness and the moon into blood, before the Great and Terrible Day of the Lord come.
The prophet Zachariah spoke of a day that will not be clear or dark, and he associates it with an earthquake at the time of the return of Jesus.
The seals is nothing more or less than great physical convulsions that will shake the earth and have been told by the Prophets and by Jesus Himself.
When the Sixth Seal was broken, John tells us that there was a great earthquake, and the sun became black as sackcloth of hair, and the moon became as blood, and the stars of heaven fell to the eath, and the heaven departed as a scroll, and every mountain and island were moved out of their place.