Article
Version 2
Preserved in Portico This version is not peer-reviewed
Surface-Wave Extraction Based on Morphological Diversity of Seismic Events
Version 1
: Received: 14 October 2018 / Approved: 16 October 2018 / Online: 16 October 2018 (11:31:18 CEST)
Version 2 : Received: 16 October 2018 / Approved: 17 October 2018 / Online: 17 October 2018 (09:00:53 CEST)
Version 2 : Received: 16 October 2018 / Approved: 17 October 2018 / Online: 17 October 2018 (09:00:53 CEST)
A peer-reviewed article of this Preprint also exists.
Qiu, X.; Wang, C.; Lu, J.; Wang, Y. Surface-Wave Extraction Based on Morphological Diversity of Seismic Events. Appl. Sci. 2019, 9, 17. Qiu, X.; Wang, C.; Lu, J.; Wang, Y. Surface-Wave Extraction Based on Morphological Diversity of Seismic Events. Appl. Sci. 2019, 9, 17.
Abstract
Extraction of high-resolution surface waves is essential in surface-wave survey. Because reflections usually interfere with surface waves on X component in a multicomponent seismic exploration, it is difficult to extract dispersion curves of surface waves. The situation goes more serious when the frequencies and velocities of higher-mode surface waves are close to those of PS-waves. A method for surface-wave extraction is proposed based on the morphological differences between reflections and surface waves. Frequency-domain high-resolution linear Radon transform (LRT) and time-domain high-resolution hyperbolic Radon transform (HRT) are used to represent surface waves and reflections respectively. Then, the sparse representation problem based on the morphological component analysis (MCA) is built and optimally solved to obtain high-fidelity surface waves. An advantage of our method is its ability to extract surface waves when their frequencies and velocities are close to those of reflections. Furthermore, results of synthetic and field examples confirm that the proposed method can attenuate the distortion of surface-wave dispersive energy caused by reflections, which contributes to extracting accurate dispersion curves.
Keywords
higher-mode surface waves; dispersion curves; morphological component analysis; Radon transform
Subject
Environmental and Earth Sciences, Geophysics and Geology
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Comments (0)
We encourage comments and feedback from a broad range of readers. See criteria for comments and our Diversity statement.
Leave a public commentSend a private comment to the author(s)
* All users must log in before leaving a comment