In what way can you say that the forces acting on the particle in the western pacific is the same force acting on a completely different particle in that same wave 1000s of miles away when it hits California? It's not by any physical definition. The relationship is purely through the chain of causation over time. In our defining that network of causation as a cohesive system. When a wave interferes with another wave, why do we say both waves died, those energies still exist, when two waves join and magnify each other or cause child waves to branch off in different directions, where does the identity of the wave go?