North Pacific storm

14°27.9′N 139°56.8′E

Waves left about 4 Oct 06:57Z, ± 3 h

Placed by 3 buoys, whose own placements lie within 368 nmi of it

Its swell was last measured at 46072 (Central Aleutians, AK) on 13 Oct 22:50Z; 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