Originally posted by jorpoulp:

7 game days for me. Got killed, spawned naked in a nearby base and the drakes stayed 7 days around, and were like following me. My other teleport bases are on another islands. I made some gears and a raft, went to to closest teleport across the sea and teleport into the attacked base. As soon i was inside the event ended. 7 days waiting and the solution was only to get inside the base to make it end...

Event timers only progress if you stay inside the raid area. This is to prevent players from just cheesing and running away from raids until they expire, as then raids would be zero threat as if a player isn't around areas unload and no damage can be done.
If you stay in the raid area they last less than 2 minutes.