According to Matthew, at the time of the end, the world will be in peril prompting Christ's return.
Matthew 24: 22 If those days had not been cut short, no one would survive, but for the sake of the elect those days will be shortened.
However, we seldom consider the tribulation period possibly beginning with some sort of a crisis which ushers the AC onto the world scene.
Here is a possibility for both the start and the end of the trib.
http://news.yahoo.com/s/yblog_thelookout/20110125/us_yblog_thelookout/underground-yellowstone-supervolcano-causing-earth-to-rise-in-some-spots
Guy
Matthew 24: 22 If those days had not been cut short, no one would survive, but for the sake of the elect those days will be shortened.
However, we seldom consider the tribulation period possibly beginning with some sort of a crisis which ushers the AC onto the world scene.
Here is a possibility for both the start and the end of the trib.
http://news.yahoo.com/s/yblog_thelookout/20110125/us_yblog_thelookout/underground-yellowstone-supervolcano-causing-earth-to-rise-in-some-spots
Guy