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see wavewave,
in oceanography, an oscillating movement up and down, of a body of water caused by the frictional drag of the wind, or on a larger scale, by submarine earthquakes, volcanoes, and landslides.
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, in oceanography.



a standing wave of long period (from several minutes to tens of hours) that arises in large or small enclosed basins of water, such as seas, lakes, and bays. Seiches result from the interference of waves created by external forces, for example, sharp changes in atmospheric pressure, wind, or seismic phenomena, with waves reflected from the end of the basin. Seiches involve oscillation of the entire mass of water, so that there always exist one or more lines (points a and a’ in Figure 1, a and b), called nodes or nodal lines, along which the level does not change.

Figure 1

Seiches may be mononodal (Figure l, a), binodal (Figure l, b), and so forth, with amplitudes from a few millimeters to several meters. For example, seiches in Lake Geneva have attained an amplitude of 2 m with a period of more than I hr. In the Bay of Algiers seiches have attained amplitudes as high as 1 m and periods somewhat longer than 1 min, and in the Sea of Azov seiches with periods up to 23 hr and amplitudes of 10–25 cm have been reported.


(fluid mechanics)
An oscillation of a fluid body in response to the disturbing force having the same frequency as the natural frequency of the fluid system.
A standing-wave oscillation of an enclosed or semienclosed water body, continuing pendulum-fashion after cessation of the originating force, which is usually considered to be strong winds or barometric pressure changes.
References in periodicals archive ?
In the simplest case of a seiche occurring where depth is constant across the basin, the wave speed is single valued and all permissible modes are harmonics of the fundamental.
However, sloshing waves called seiches can arise within the harbor and cause water levels to vary as much as 1.8 meters in as little as 45 minutes.
This correlation strongly suggested a relationship between Puerto Rico seiche activity and the astronomical tides, specifically the semidiurnal tides because only they, and not the diurnal tides, are tied to the moon's phases.
Sites where ice rubble (broken pieces of ice) can be observed around structures have seiche activity.
"We have managed to establish ourselves in the highly-competitive smartphone market," Florian Seiche, CEO of HMD Global, said at the event.
Mr Seiche said the phone combined the "durability of a feature phone with the latest software experience".
Called a "seiche," it happens when a wide wave builds due to seismic or atmospheric disturbances, creating huge fluctuations in water levels in just moments.
La superposicion de la onda incidente y reflejada en el interior de la ensenada puede formar, entre otras, una onda larga estacionaria dentro de la misma, conocida como "seiche", cuyas caracteristicas (periodo y longitud de onda) dependen de las caracteristicas geometricas de la ensenada; para una bahia pequena y poco profunda, el periodo propio puede ser de tan solo unos minutos.
Florian Seiche, president of HTC EMEA, said: "Our HTC One Series represents the pinnacle of our smartphone achievements so far -- especially the HTC One X.
Florian Seiche, President, HTC, EMEA said: "Our HTC One Series represents the pinnacle of our smartphone achievements so far - especially the HTC One X.
"The HTC Touch2 delivers a familiar touch experience that millions of people have come to expect and rely on from HTC in their daily lives," said Florian Seiche, Vice President, HTC EMEA.
It caused a giant sloshing wave, called a seiche, on Loch Ness.