Duran, the context places this occurrence after the sixth seal. According my timeline this will take place at the beginning of the GT. During this time the 144,000 will be sealed. I agree, they will be hiding there until after the GT, where they will most probably be entombed.
For me the horses has started their gallop at the beginning of the First World War. At the end of the war we had the Spanish Flu. In 1933 the world experienced the Great Depression. Then came the Second World War. So they have been galloping right into the 21st century. According to historians there have been no year since then free from war. Now the world seems to be on the verge of a great conventional war, if not World War III.
As already stated, I believe the GT to be seven years in length, unless the days have been cut short. Signs in sun, moon and stars will happen often. After the breaking of the sixth seal, after the fourth trumpet blast, during Jesus' Second Coming and during Armageddon. After the GT Jesus comes. He will fetch his saints, his marriage in heaven and then Armageddon, according to natural Revelation progression.
Again, just a thought on verb "worship:"
To give one’s honour and allegiance to a higher power. To “express by attitude and possibly by position one’s allegiance to and regard for a higher authority.” See Louw-Nida. To “express in attitude or gesture one’s complete dependence on or submission” to a high authority figure or organization, in this case the beast, its image as well as the dragon (cf. Rev. 13:8, 12, 15; 14:11;16:2; 19:20; 20:4; cf. 13:4). See BDAG.