South Pacific storm

20°27.4′S 128°51.9′W

Waves left about 30 Sep 11:06Z, ± 5 h

Placed by 7 buoys, whose own placements lie within 442 nmi of it

Its swell was last measured at 46277 (Green Beach Offshore) on 10 Oct 21:00Z; 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