North Pacific storm

46°53.3′N 178°27.5′E

Waves left about 1 Oct 07:48Z, ± 4 h

Placed by 9 buoys, whose own placements lie within 407 nmi of it

Its swell was last measured at 46028 (Cape San Martin, CA) on 9 Oct 06:50Z; 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