دورية أكاديمية
Ultrahigh-resolution 9C seismic survey in a landslide prone area in southwest of Sweden
| العنوان: | Ultrahigh-resolution 9C seismic survey in a landslide prone area in southwest of Sweden |
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| المؤلفون: | Pertuz, Tatiana, Malehmir, Alireza |
| بيانات النشر: | Uppsala universitet, Geofysik |
| سنة النشر: | 2023 |
| المجموعة: | Uppsala University: Publications (DiVA) |
| مصطلحات موضوعية: | Image processing, Seismic anisotropy, Wave propagation, Geophysics, Geofysik |
| الوصف: | We studied the benefits of a nine-component (9C) seismic survey over a landslide-prone area in southwest of Sweden to retrieve ultrahigh-resolution shear wave reflection images of the subsurface as well as crucial information on physical properties of the sediments. A complete, 1 m shot and receiver spacing, multicomponent 2-D seismic profile was acquired using three-component microelectromechanical-system-based landstreamer receivers, and a 5-kg sledgehammer strike in vertical and horizontal orientations as three-component seismic source. Given the rich number of shear wave reflections observed on all the 9C data, the processing work focused on their retrievals. It revealed three distinct reflections, two of which associated with coarse-grained materials and one with an extremely undulating bedrock surface. Given the extremely slow shear wave velocities on the order of 60–100 m s−1, we obtained ultrahigh-resolution shear wave sections avoiding temporal and spatial aliasing. Imaging results suggest vertical-source and horizontal-radial receiver (V–HR), and horizontal-transverse source–receiver orientations (HT–HT) provided the most optimum images of the subsurface. A non-hyperbolic algorithm was applied to the normal-moveout corrections justified by the traveltime differences of the bedrock reflection in different shear wave sections. The improved images by incorporating the anisotropy term suggest that the data set reveals moderate shear wave anisotropy along some portions of the profile. The Vp/Vs ratio obtained by using bedrock reflection in P- and S-wave sections suggests values ranging 10–16, which implies high water content. Areas with lower Vp/Vs coincides with greater anisotropic parameters and this can indicate disturbed clays or presence of sensitive clays. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| العلاقة: | Geophysical Journal International, 0956-540X, 2023, 235:3, s. 2094-2106; orcid:0000-0002-1234-0227; orcid:0000-0003-1241-2988; http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-516338Test; ISI:001093108000001 |
| DOI: | 10.1093/gji/ggad346 |
| الإتاحة: | https://doi.org/10.1093/gji/ggad346Test http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-516338Test |
| حقوق: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.2F88E9F4 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1093/gji/ggad346 |
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