North Pacific storm

38°03.3′N 173°14.8′E

Waves left about 23 Oct 10:57Z, ± 4 h

Placed by 5 buoys, whose own placements lie within 432 nmi of it

Its swell is still arriving: last measured at 46244 (Humboldt Bay, North Spit, CA (168)) on 29 Oct 04:20Z.

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