A SOLOUTION FOR THIN LAYER AND VELOCITY INVERSION IN SEISMIC REFRACTION SURVEYS.

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MOUSAPOUR M.S.; MORADZADEH A.; SIAHKOOHI H.

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Paper Information

Journal: Journal of the Earth and Space Physics Year:2003 | Volume:29 | Issue:1 Page(s): 59-68

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Title

A SOLOUTION FOR THIN LAYER AND VELOCITY INVERSION IN SEISMIC REFRACTION SURVEYS.

Author(s)

MOUSAPOUR M.S. | MORADZADEH A. | SIAHKOOHI H. | Issue Writer Certificate

Keywords

SEISMIC REFRACTION SURVEYSQ4

BLIND ZONEQ4

HIDDEN LAYERQ4

VELOCITY INVERSIONQ4

POSTCRITICAL REFLECTIONSQ4

ANOMALY OFF SETQ4

Abstract

In a multilayer earth model, if the thickness of a layer is smaller than a theoretical limit, its refracted signals would not be recorded as first arrivals and the layer will be hidden. This event is known as BLIND ZONE. Also in a multilayer earth model if velocity of a layer is smaller than the surrounding layers (below and above layers), no refracted signal of their interfaces would appear as first arrivals. This event is called VELOCITY INVERSION and the layer that has this property is said HIDDEN LAYER. Due to these conditions, some errors would occur in calculation of depth and velocity of underlaying layer in seismic surveys. In this study it was shown that lateral arrivals such as POSTCRITICAL REFLECTIONS are useful for identifying BLIND ZONE and its parameters. Results of using this method on synthetic data are presented. It was also shown that if there is any undulation on the surface of refractor, it could be used for identifying HIDDEN LAYER and calculating its parameter by determination of the horizontal spacing between effects of these undulations on travel-time curve.

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APA: Copy

MOUSAPOUR, M.S., MORADZADEH, A., & SIAHKOOHI, H.. (2003). A SOLOUTION FOR THIN LAYER AND VELOCITY INVERSION IN SEISMIC REFRACTION SURVEYS.. JOURNAL OF THE EARTH AND SPACE PHYSICS, 29(1), 59-68. SID. https://sid.ir/paper/80366/en

Vancouver: Copy

MOUSAPOUR M.S., MORADZADEH A., SIAHKOOHI H.. A SOLOUTION FOR THIN LAYER AND VELOCITY INVERSION IN SEISMIC REFRACTION SURVEYS.. JOURNAL OF THE EARTH AND SPACE PHYSICS[Internet]. 2003;29(1):59-68. Available from: https://sid.ir/paper/80366/en

IEEE: Copy

M.S. MOUSAPOUR, A. MORADZADEH, and H. SIAHKOOHI, “A SOLOUTION FOR THIN LAYER AND VELOCITY INVERSION IN SEISMIC REFRACTION SURVEYS.,” JOURNAL OF THE EARTH AND SPACE PHYSICS, vol. 29, no. 1, pp. 59–68, 2003, [Online]. Available: https://sid.ir/paper/80366/en

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