By the way this happened in the past.

More:

There will be a slow "contractionary Shift", like a woman in labor, to allow the 20-30 mil to assemble, before the Main Shift.

When those people are assembled, the the ships appear out of No-Where.

These will be massive ships to accomodate millions of people in hundreds of locations.

No touchdown. Humans will be levitated.
After all are aboard, a very violent "nudging" of the Axis occurs.

The sweet Moment you all have prayed for.
Every single living thing will die, as the Oceans will sweep across every continent and strip of land.

The underground cities will be flooded.
There will be almost no survivors.

Back in a minute.