Konoha's a pretty big place, and in spite of the "village hidden in" name, not that well concealed. Even without the internet, the local-time
ability to rapidly pass data and mobilize forces, along with the obvious significance of an Event in geological terms alone could have a whole lot of attention
focused in on the area *very* quickly. That happens almost instantly if you replace a chunk of suburb. It would slow down some if you dropped it into a less
developed area, and potentially could hold off quite a while if you dropped it into effectively untrammeled wilderness (particularly untrammeled wilderness
that was heavily wooded to start with) and gave them enough adapt and react time to get the Genjutsu up before they got noticed.
If you do have the "instant swarm of hornets" effect, that's going to make it a lot harder to infiltrate much of anything for long periods of
time. Ninja are good at infiltration, but there would be basic knowledge that a ninja infiltrator just wouldn't know about our world. they could probably
bluff past it if nobody knew about Konoha, but if "the world has ninja in it now" was a known thing, that suddenly becomes something you can't
laugh off anymore.
Mind you, it's not a bad concept, and might be interesting in execution, but it goes tremendously chaotic very quickly if you don't give the ninja at
least some "adapt and learn" time before they get discovered.
ability to rapidly pass data and mobilize forces, along with the obvious significance of an Event in geological terms alone could have a whole lot of attention
focused in on the area *very* quickly. That happens almost instantly if you replace a chunk of suburb. It would slow down some if you dropped it into a less
developed area, and potentially could hold off quite a while if you dropped it into effectively untrammeled wilderness (particularly untrammeled wilderness
that was heavily wooded to start with) and gave them enough adapt and react time to get the Genjutsu up before they got noticed.
If you do have the "instant swarm of hornets" effect, that's going to make it a lot harder to infiltrate much of anything for long periods of
time. Ninja are good at infiltration, but there would be basic knowledge that a ninja infiltrator just wouldn't know about our world. they could probably
bluff past it if nobody knew about Konoha, but if "the world has ninja in it now" was a known thing, that suddenly becomes something you can't
laugh off anymore.
Mind you, it's not a bad concept, and might be interesting in execution, but it goes tremendously chaotic very quickly if you don't give the ninja at
least some "adapt and learn" time before they get discovered.