North Pacific storm

43°24.1′N 152°27.2′E

Waves left about 22 Oct 09:31Z, ± 3 h

Placed by 4 buoys, whose own placements lie within 518 nmi of it

Its swell is still arriving: last measured at 51000 (Northern Hawaii One) on 29 Oct 23:20Z.

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