shadow zone


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shadow zone

[′shad·ō ‚zōn]
(acoustics)
A region, usually under water or in the atmosphere, which sound waves will not reach, according to ray acoustics.
(geophysics)
The zone, between 103 and 143° from the epicenter of an earthquake, in which direct seismic waves do not arrive because of refraction and absorption by the earth's core.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Azmi Bishara's Love in a Shadow Zone, whose fictional world is fragmented and chaotic reflecting the inner worlds of its main characters, is at the heart of the preoccupation of modern literature.
Fronteer Development Group Incorporated (Fronteer) (TSX: FRG) (NYSE: FRG), an exploration and development company, has announced that new drilling at Long Canyon has increased the Shadow Zone 100 metres to the north.
Bath (1957) studied the shadow zones, travel times and energies of longitudinal seismic waves in the presence of an asthenosphere low-velocity layer.
There was a shadow zone within which no waves were detectable.
This programme extends mineralisation an additional 100 metres to the north of the Shadow Zone where it still remains open to expansion.
With his new volume of poems, the author embarks on a relentlessly inquiring journey into the shadow zone in which the rational mind is ill at ease, beyond "the sum of names and data, vast and unknowable."
The UV-functional group and the isocyanate functional group, responsible for the shadow zone curing, are attached to the same polymer molecule.
Results from a drill programme confirmed presence of a parallel zone of mineralization, referred to as the Shadow Zone, which is located around 200m to the northwest of a main mineralized zone.
Followed by visitor counts is the heatmap solution, which is used to detect highly-populated shadow zones. Heatmap data is based on triangulation of signal strength by using several access points, but primarily depends on the position of the smart device.
Risk Profile: Radiation from a mobile phone increases exponentially in low coverage areas, or shadow zones. The biggest risk is the proximity of a mobile phone - it radiates at close quarters to the brain.