DocumentCode :
1109731
Title :
Detection of wave reflectors and wave sources in the earth subsurface
Author :
Pitas, Ioannis ; Venetsanopoulos, Anastasios N.
Author_Institution :
University of Thessaloniki, Thessaloniki, Greece
Volume :
34
Issue :
5
fYear :
1986
fDate :
10/1/1986 12:00:00 AM
Firstpage :
1245
Lastpage :
1257
Abstract :
Event detection is a very important task in geophysics. It encompasses the detection of wave sources (earthquakes, subsurface explosions) and the detection of wave reflectors (interfaces between rock layers having different velocities and/or different densities). The latter application is very important in seismic oil prospecting. Seismic events release energy which propagates toward the earth surface as waves which are recorded by arrays of sensors. The data recorded are usually corrupted by noise, which sometimes is much stronger than the weak events. The aim of this paper is to couple wave theory and detection theory to detect seismic events in an optimal way. A statistical model of the earth is proposed. This model combined with the wave equation describes sufficiently well the wave propagation in the stratified earth. Optimal and suboptimal receivers for event detection, based on this earth model, are proposed. The validity of our approach is demonstrated by simulation examples.
Keywords :
Acoustic reflection; Earth; Earthquakes; Event detection; Explosions; Partial differential equations; Petroleum; Seismology; Sensor arrays; Surface waves;
fLanguage :
English
Journal_Title :
Acoustics, Speech and Signal Processing, IEEE Transactions on
Publisher :
ieee
ISSN :
0096-3518
Type :
jour
DOI :
10.1109/TASSP.1986.1164960
Filename :
1164960
Link To Document :
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