Ultra-high-resolution multicomponent seismic imaging of a quick-clay landslide-prone area in southwest of Sweden

PreviousNext No AccessFirst International Meeting for Applied Geoscience & Energy Expanded AbstractsUltra-high-resolution multicomponent seismic imaging of a quick-clay landslide-prone area in southwest of SwedenAuthors: Tatiana PertuzAlireza MalehmirTatiana PertuzUppsala UniversitySearch for more papers by this author and Alireza MalehmirUppsala UniversitySearch for more papers by this authorhttps://doi.org/10.1190/segam2021-3583297.1 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail AbstractMajority of landslides in the Northern countries are associated with sensitive, low-shear strength, quick clays. Given their unique properties, geophysical and geotechnical methods are applied to understand their settings and areas that are likely prone to landslides. These investigations will accelerate as recent devastations and occurrences are significant taking the attention of both scientific and governmental organizations. In this study and following a series of earlier investigations, an ultra high-resolution seismic profile was acquired with three-component (3C) seismic receivers in an area in southwest of Sweden. The data acquisition benefited from 269 fixed-position wireless recorders, 1 m spaced, 10-Hz vertical component geophones, and a roll-along-landstreamer of 120-3C MEMS-based along an approximately 240 m long profile. Two seismic sources were tested namely a 5-kg sledgehammer and a horizontal vibrator. Here, we present only the sledgehammer data and show how strong shear-to-shear reflections were generated within an extremely low-velocity (70-85 m/s) medium allowing a high-resolution reflection section to be generated from only vertical component receivers. Given the richness of the dataset, we will discuss implications and opportunities for detailed mapping the subsurface where quick clays are expected to be present and glacial (and post-glacial) sediments that these quick clays are interbedded. We image sets of strong reflections, onlapping an undulating bedrock, within the normally consolidated clays that we interpret to originate from silty-sandy layers where these sometimes act as slip-surface or conduit for fresh water. Given the extremely low shear-wave velocity, we speculate that the sediments have very high-water content.Keywords: 2D, acquisition, P-wave, shear wave (S-wave), multicomponentPermalink: https://doi.org/10.1190/segam2021-3583297.1FiguresReferencesRelatedDetails First International Meeting for Applied Geoscience & Energy Expanded AbstractsISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2021 Pages: 3561 publication data© 2021 Published in electronic format with permission by the Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished: 01 Sep 2021 CITATION INFORMATION Tatiana Pertuz and Alireza Malehmir, (2021), "Ultra-high-resolution multicomponent seismic imaging of a quick-clay landslide-prone area in southwest of Sweden," SEG Technical Program Expanded Abstracts : 1811-1815. https://doi.org/10.1190/segam2021-3583297.1 Plain-Language Summary Keywords2DacquisitionP-waveshear wave (S-wave)multicomponentPDF DownloadLoading ...