[ He doesn't ask invited by? because he's fairly certain Spock would have included that. ]

Alright. You're going to take down as many readings from this place as you can. Apart from your word, that tricorder is your proof that any of this exists. Everyone who comes here has some connection to Earth, I believe there's enough suggestive evidence to safely assume this place exists around the planet in its own temporal fold. It keeps sucking people in from it, from all over the time-line.

Once you have enough information, then you contact the Enterprise, beam back and convince Starfleet there's a very real threat right on their doorstep.

[ His throat works as he pauses. ]

Your second priority is to smash this sonofabitch open and get us out. You might have to convince me to help, my time-line could have re-continued.