surface wave

(redirected from Groundwave)
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surface wave

n.
A seismic wave that travels across the surface of the earth rather than through it. Surface waves usually travel more slowly and have larger amplitudes and longer wavelengths than body waves.

surface wave

An earthquake wave in which rock particles vibrate at right angles to the direction of wave travel. Surface waves travel only on the Earth's surface, and not through it. Also called L wave. See Note at earthquake.
References in periodicals archive ?
Multiband antenna HF groundwave was successfully communicated on a small boat at-sea over water at a distance of 66 miles.
Based on propagation research conducted at NBS and elsewhere, it was already known that this could be done by broadcasting a groundwave signal that traveled within the duct formed by the ionosphere and surface of the Earth, instead of relying on reflection from the ionosphere for propagation as the shortwave stations had done.
Looking at these in more detail, the RDF3210 direction-finder is a transportable system which Racal bills as one of the few systems capable of effective resolution of HF-band high-angle skywave, low-angle sky-wave and groundwave signals.