North Pacific storm

09°11.4′N 156°31.4′W

Waves left about 21 Oct 14:01Z, ± 4 h

Placed by 4 buoys, whose own placements lie within 349 nmi of it

Its swell was last measured at 46076 (Cape Cleare, AK) on 29 Oct 06:50Z; the replay ends there.

Each buoy places the storm from how its swell's period shortened as it arrived: the longest waves travel fastest. Fronts are drawn at deep-water group speeds along great circles, and stop at land. How it is worked out