North Pacific storm

21°59.2′N 173°33.8′E

Waves left about 3 Oct 04:56Z, ± 4 h

Placed by 6 buoys, whose own placements lie within 540 nmi of it

Its swell was last measured at 46047 (Tanner Bank, CA) on 10 Oct 19:50Z; 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