When Satan is cast down to earth in Revelation 12:12, he will seek to persecute the woman, Israel, for a time, times, half time, in Revelation 12:14.
So that is how long the third woe lasts. During that time, times, half time - Satan will be restricted to being on earth.
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As soon as Satan is cast down to earth at the beginning of the third woe, he will be tossed the key to bottomless pit. And as the falling star in Revelation 9:1, when he opens the bottomless pit, it releases the flesh tormenting locust described as the first woe.
I know that sounds strange, but the first woe and the beginning of third woe are tied together.
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