The last 3 tetrads have been associated with events that affect the Jews and, most interesting, begin with doom and end with celebration. Look at 1492, the Jews were expelled from Spain, and America (future haven for Jews) was discovered. In 1949 the Jews were reeling from the Holocaust, and the State of Israel was founded. In 1967 it was the Six Day War that ended with the reunification of Jerusalem. It is safe to assume that the same pattern will hold for this tetrad, which means it is NOT the Rapture since it will not affect Israel. My guess would be the Psalm 83 War, beginning as a war of annihilation and ending with the utter defeat of the arab nations immediately surrounding Israel.
http://ldolphin.org/risk/ult.shtml
We aren't going to have any advanced notice, it will just take place. But it will certainly be "soon." Of course, each of us sees Jesus upon our own death-- so that train is already coming.