Prism waves in seafloor canyons and their effects on seismic imaging

Autor:	David Lumley, James Deeks
Rok vydání:	2015
Předmět:	Canyon geography geography.geographical_feature_category Wave propagation Geophysical imaging Continental shelf Geophysics Seafloor spreading Seismic wave Geochemistry and Petrology Bathymetry Prism Geology Seismology
Zdroj:	GEOPHYSICS. 80:S213-S222
ISSN:	1942-2156 0016-8033
DOI:	10.1190/geo2015-0014.1
Popis:	Complex seafloor bathymetry can create significant challenges for subsurface imaging and geologic interpretation of seismic exploration and monitoring data. Steep seafloor canyons that cut through continental shelf areas can produce very strong seismic wavefield distortions. Neglecting such wavefield complexity can result in inaccurate velocity models, significant imaging errors, misleading amplitudes, and erroneous geologic interpretations. We have evaluated the kinematic and dynamic effects of seismic prism waves generated by seafloor canyons. Prism waves are seismic waves that undergo consecutive reflections at a scattering interface before propagating to the recording sensor array. We have demonstrated that strong prism waves can be generated for realistic seafloor canyon geometries, and we determined how their adverse effects can contaminate seismic imaging and velocity estimation.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::97b959d9a09c0cb77d2d04cf78e868f9 https://doi.org/10.1190/geo2015-0014.1 Zobrazit plný text záznamu