Hey there, I don’t know the exact location of this epicenter but when you spawn in at the border of nimbus just turn your ship around and follow the compass to dark sea. When you reach the middle of i4 turn either left or right. I just know that this epi is very close to the straight line. Good luck
how do i know when the middle of i4 is
calculate the distance and time it takes you to get from i4 to i5
then turn back from i5 and go backwards for half that time
then just go left or right and try to stay within the middle
mainly relies on pure intuition and practice