North Pacific storm

34°58.3′N 131°10.2′W

Waves left about 21 Oct 06:45Z, ± 2 h

Placed by 6 buoys, whose own placements lie within 275 nmi of it

Its swell was last measured at 46082 (Cape Suckling, AK) on 25 Oct 17:50Z; 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