Noorlandt, Rik, Kruiver, Pauline P, de Kleine, Marco PE, Karaoulis, Marios, de Lange, Ger, Di Matteo, Antonio, von Ketelhodt, Julius, Ruigrok, Elmer, Edwards, Benjamin 
ORCID: 0000-0001-5648-8015, Rodriguez-Marek, Adrian et al (show 3 more authors)
(2018)
Characterisation of ground motion recording stations in the Groningen gas field.
JOURNAL OF SEISMOLOGY, 22 (3).
pp. 605-623.
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Characterisation of ground motion recording stations in the Groningen gas field.pdf - Published version Download (6MB) |
Abstract
The seismic hazard and risk analysis for the onshore Groningen gas field requires information about local soil properties, in particular shear-wave velocity (<i>V</i><sub>S</sub>). A fieldwork campaign was conducted at 18 surface accelerograph stations of the monitoring network. The subsurface in the region consists of unconsolidated sediments and is heterogeneous in composition and properties. A range of different methods was applied to acquire in situ <i>V</i><sub>S</sub> values to a target depth of at least 30 m. The techniques include seismic cone penetration tests (SCPT) with varying source offsets, multichannel analysis of surface waves (MASW) on Rayleigh waves with different processing approaches, microtremor array, cross-hole tomography and suspension P-S logging. The offset SCPT, cross-hole tomography and common midpoint cross-correlation (CMPcc) processing of MASW data all revealed lateral variations on length scales of several to tens of metres in this geological setting. SCPTs resulted in very detailed <i>V</i><sub>S</sub> profiles with depth, but represent point measurements in a heterogeneous environment. The MASW results represent <i>V</i><sub>S</sub> information on a larger spatial scale and smooth some of the heterogeneity encountered at the sites. The combination of MASW and SCPT proved to be a powerful and cost-effective approach in determining representative <i>V</i><sub>S</sub> profiles at the accelerograph station sites. The measured <i>V</i><sub>S</sub> profiles correspond well with the modelled profiles and they significantly enhance the ground motion model derivation. The similarity between the theoretical transfer function from the <i>V</i><sub>S</sub> profile and the observed amplification from vertical array stations is also excellent.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Shear-wave velocity, Field measurements, MASW, Cross-hole tomography, Seismic cone penetration test, Shallow geology, Lateral heterogeneity |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 26 Jan 2018 14:01 |
| Last Modified: | 01 Feb 2024 21:00 |
| DOI: | 10.1007/s10950-017-9725-6 |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3016926 |
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