I think this is pretty ok-ish. Interesting take, and the idea of a threshold in an ocean is really intriguing to me.
But they have an aircraft carrier?! And an entire fleet of military ships?!! And they just "borrowed them"???? And took them to the middle of nowhere?!! AND WHEN FIVE SHIPS SINK, INCLUDING AN ENTIRE AIRCRAFT CARRIER, ONLY 38 PEOPLE DIE?!! WHAT?!!!!!!!!!!!!
Anyway, the article sorta declines in quality from the halfway point. I dunno why it keeps bringing up Monster (just say "energy drink) and the line "This is very unusual as the inhabitants of the island are very xenophobic and tend to have a bad view of everything that comes from the outside world." should just be cut, because 1) the inhabitants never come up again and 2) what does this have to do with a can washing up on shore?
I think the cursive font for the diary is very difficult the read and should be replaced.
Overall, I was initially attracted to the concept but everything after the initial description is very weak and needs a lot of work. Like I said, ok-ish at first. Sound idea, execution needs improvement.