Sneaker Wave
Updated 2026-08-02
INTRODUCTION
English translation pending.
CORE DEFINITION
A sneaker wave is an unexpectedly large wave that appears on a comparatively calm shore, formed when several smaller wave trains briefly align and their heights add together. Unlike a tsunami, it requires no seismic event and can arrive with almost no warning on an ordinary day. Oceanographers study such extreme waves, sometimes called rogue waves, using statistical models of wave superposition. Key qualification: the phenomenon is a tail event, so its absence over a long observed record does not establish that it cannot occur.
SCAFFOLDING EFFECT
Reduce cognitive load
- Respect the tail: assume rare extreme events will occur even when the record looks calm. - Keep margin: hold reserves that cover outcomes far beyond the average. - Never turn your back: design so that a single extreme event cannot be fatal.
Anchor fast decisions
Individual wave trains have modest heights, but when several crests coincide in time and place their amplitudes add rather than cancel. The probability of any given moment producing alignment is low, but over many waves and locations the extreme outcome becomes likely somewhere. Because the mechanism is superposition rather than an external cause, the calm record provides no warning.
MINIMUM ACTION
In progress 0/1Practice this model in one real situation:
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Source support: Explicit
- zh.wikipedia.orghttps://zh.wikipedia.org/wiki/%E7%98%8B%E7%8B%97%E6%B5%AAverified
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