North Pacific storm

43°51.7′N 153°43.9′E

Waves left about 22 Oct 11:21Z, ± 2 h

Placed by 4 buoys, whose own placements lie within 456 nmi of it

Its swell is still arriving: last measured at 51000 (Northern Hawaii One) on 29 Oct 22:50Z.

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