Shalom Gina:

For what it's worth, I did a chart of the Revelation Seals.

I was especially watchful for the words Tribulation and Wrath.

My study came up with the Great Tribulation mentioned ONLY in Revelation 7:9-17 whic is Seal 6.

I found the first reference to the Wrath of GOD at Revelation 15:1 which is Seal 7, Trumpet 7, after the Harvest of the earth/song of the Victorious.

If you go to this site you will find the results of my study:
http://home.centurytel.net/grafted-promise/endtimeline.html
Just click on the links to see the graphics.

A sister in Yeshua.
Dianne