Underwater wave
A Seiche (pronounced SAYSH) or an underwater wave is an underwater, irregular fluctuation or rhythmic rocking of the water level of a lake, first noted in Lake Geneva, Switzerland. Observers on the surface may not know a seiche is happening.
Seiches are common between warm and cold-water layers, notably in Loch Ness, Scotland, and some evidence cited for the Loch Ness monster and the Lake Champlain monster (see also Lake monster and Sea monster) may trace to seiches.
Seiches often occur during earthquakes and may be caused by wind or underwater landslides.
Seiche is also a French term for a type of cuttlefish.
External links and references
General:
On aquatic monsters:
The French term:
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