Regardless of whether Jughead really did explode and regardless of whether it directly caused the splitting of the timeline, I am *not* convinced that the detonation of Jughead is the reason the island is at the bottom of the sea in the season 6 premiere. Here are the two main reasons:
- An island, like any other land mass, is still attached to the sea floor. It’s like a mountain in the ocean. Much of the mountain is underwater, and the part we think of as the island is just the dry land portion that is exposed above sea level. Sinking the island would be like sinking a mountain.
- If a bomb was powerful enough to “sink” an island, it would also be powerful enough to damage (if not obliterate) the Dharma/Others barracks, the security fence, and the Tawaret statue foot, all of which are relatively intact when we see the island underwater.
So, how is the island underwater? My only guess is that the island was moved, as Eloise Hawking said it could be and as we saw in the season four finale when Ben turned the frozen donkey wheel. Only, in its last move in the new timeline, it landed in a location where the sea floor was deeper than usual so that none of the island could be exposed above sea level.
Some fans online have theorized that this is how the Black Rock shipwrecked in the middle of the island. It could be that the ship sunk over a submerged island, came to rest in the middle of it, and became landlocked the next time the island was moved to a higher elevation.
The only other way the island could move and/or sink is that the island is free-floating, not attached to the sea floor at all. I’m not sure that is geologically possible. Plus, if the boundaries of the island were finite, I would think all the sand would eventually erode off the edges.
So, why is the island underwater & intact at the same time? If my theory is wrong, I can’t wait to see how Damon & Carlton will explain this new mystery.