Shallow marine seismic inversion strategy using air-gun secondary bubble signature

Shallow marine seismic inversion strategy using air-gun secondary bubble signature | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Shallow marine seismic inversion strategy using air-gun secondary bubble signature Jiho Ha, Jungkyun Shin, Kyoumgmin Lim This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8303983/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract Seismic surveys in coastal and shallow waters have gained increasing importance due to the growing demand for marine infrastructure development, coastal ground stability assessment, and environmental monitoring. However, in coastal waters with depths of approximately 5–30 m, limitations such as restricted vessel operation, short offsets, and a lack of low frequency components make it difficult to obtain reliable long wavelength velocity models. This study proposes a strategy to regenerate secondary bubble signals from an air-gun source—typically treated as components to be removed—as effective low frequency information in shallow marine seismic data obtained using a portable air-gun/streamer system. Using deterministic deconvolution with the source wavelet, the primary reflections were separated from the raw data, and the residual between them was used to construct the secondary bubble–dominant dataset. The long wavelength velocity structure was then inverted using direct envelope reflection based full waveform inversion (DE-RFWI). Application to field data acquired in the Yeongil Bay area of Pohang demonstrates that the proposed approach provides a more structurally consistent long wavelength velocity model compared with primary-based FWI, confirming that reliable velocity models can be obtained even under short-offset and low frequency-deficient conditions. This study offers a practical framework that overcomes the inherent limitations of portable shallow marine seismic systems and enhances subsurface property modeling in coastal and transition zone environments. Shallow seismic survey coastal seismic survey secondary bubble low frequency DE-RFWI long wavelength Full Text Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-8303983","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":560565998,"identity":"a3d49713-225b-4f62-9f5a-b7afe687c46b","order_by":0,"name":"Jiho Ha","email":"","orcid":"","institution":"Korea Institute of Geoscience and Mineral Resources","correspondingAuthor":false,"prefix":"","firstName":"Jiho","middleName":"","lastName":"Ha","suffix":""},{"id":560565999,"identity":"9d73f511-41ac-44cf-adbb-000473f64fe5","order_by":1,"name":"Jungkyun 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