Abrupt vs gradual harvest

[Siren]

When someone dies, does their influence on the planetary vibrations stop?

By "dying" I suppose you mean leaving the current 3rd density space/time continuum. If so, it is my understanding that the "dead," or discarnate, entities residing within this sphere's inner planes (time/space) do influence the planetary vibrations to some degree. It is only when an entity is in some way relocated, transplanted or otherwise removed from the planetary locus (from both its space/time and time/space) that, generally-speaking, the influence would no longer hold sway.

This is an oversimplification, of course, as the mechanics are somewhat more complex.

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EDIT: I think I may have misunderstood your question in the first place, so I readjusted the answer upon second review.