Ambient vibration measurements in the Southern Rhine Graben close to Basle
This study presents results of ambient noise measurements from temporary single station and small-scale array deployments in the northeast of Basle. H/V spectral ratios were determined along various profiles crossing the eastern masterfault of the Rhine Rift Valley and the adjacent...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Istituto Nazionale di Geofisica e Vulcanologia (INGV)
2004-06-01
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| Series: | Annals of Geophysics |
| Subjects: | |
| Online Access: | http://www.annalsofgeophysics.eu/index.php/annals/article/view/3374 |
| _version_ | 1819073223319355392 |
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| author | F. Kind S. Stange F. Scherbaum A. Köhler M. Ohrnberger |
| author_facet | F. Kind S. Stange F. Scherbaum A. Köhler M. Ohrnberger |
| author_sort | F. Kind |
| collection | DOAJ |
| description | This study presents results of ambient noise measurements from temporary single station and small-scale array deployments in the northeast of Basle. H/V spectral ratios were determined along various profiles crossing the eastern masterfault of the Rhine Rift Valley and the adjacent sedimentary rift fills. The fundamental H/V peak frequencies are decreasing along the profile towards the eastern direction being consistent with the dip of the tertiary sediments within the rift. Using existing empirical relationships between H/V frequency peaks and the depth of the dominant seismic contrast, derived on basis of the ?/4-resonance hypothesis and a power law depth dependence of the S-wave velocity, we obtain thicknesses of the rift fill from about 155 m in the west to 280 m in the east. This is in agreement with previous studies. The array analysis of the ambient noise wavefield yielded a stable dispersion relation consistent with Rayleigh wave propagation velocities. We conclude that a significant amount of surface waves is contained in the observed wavefield. The computed ellipticity for fundamental mode Rayleigh waves for the velocity depth models used for the estimation of the sediment thicknesses is in agreement with the observed H/V spectra over a large frequency band. |
| first_indexed | 2024-12-21T17:50:12Z |
| format | Article |
| id | doaj.art-cecb045ef292481b9dd52923baf10edc |
| institution | Directory Open Access Journal |
| issn | 1593-5213 2037-416X |
| language | English |
| last_indexed | 2024-12-21T17:50:12Z |
| publishDate | 2004-06-01 |
| publisher | Istituto Nazionale di Geofisica e Vulcanologia (INGV) |
| record_format | Article |
| series | Annals of Geophysics |
| spelling | doaj.art-cecb045ef292481b9dd52923baf10edc2022-12-21T18:55:23ZengIstituto Nazionale di Geofisica e Vulcanologia (INGV)Annals of Geophysics1593-52132037-416X2004-06-0147610.4401/ag-3374Ambient vibration measurements in the Southern Rhine Graben close to BasleF. KindS. StangeF. ScherbaumA. KöhlerM. OhrnbergerThis study presents results of ambient noise measurements from temporary single station and small-scale array deployments in the northeast of Basle. H/V spectral ratios were determined along various profiles crossing the eastern masterfault of the Rhine Rift Valley and the adjacent sedimentary rift fills. The fundamental H/V peak frequencies are decreasing along the profile towards the eastern direction being consistent with the dip of the tertiary sediments within the rift. Using existing empirical relationships between H/V frequency peaks and the depth of the dominant seismic contrast, derived on basis of the ?/4-resonance hypothesis and a power law depth dependence of the S-wave velocity, we obtain thicknesses of the rift fill from about 155 m in the west to 280 m in the east. This is in agreement with previous studies. The array analysis of the ambient noise wavefield yielded a stable dispersion relation consistent with Rayleigh wave propagation velocities. We conclude that a significant amount of surface waves is contained in the observed wavefield. The computed ellipticity for fundamental mode Rayleigh waves for the velocity depth models used for the estimation of the sediment thicknesses is in agreement with the observed H/V spectra over a large frequency band.http://www.annalsofgeophysics.eu/index.php/annals/article/view/3374H/V ratioambient vibrationarray analysisfundamental frequencyRhine Rift Valley |
| spellingShingle | F. Kind S. Stange F. Scherbaum A. Köhler M. Ohrnberger Ambient vibration measurements in the Southern Rhine Graben close to Basle Annals of Geophysics H/V ratio ambient vibration array analysis fundamental frequency Rhine Rift Valley |
| title | Ambient vibration measurements in the Southern Rhine Graben close to Basle |
| title_full | Ambient vibration measurements in the Southern Rhine Graben close to Basle |
| title_fullStr | Ambient vibration measurements in the Southern Rhine Graben close to Basle |
| title_full_unstemmed | Ambient vibration measurements in the Southern Rhine Graben close to Basle |
| title_short | Ambient vibration measurements in the Southern Rhine Graben close to Basle |
| title_sort | ambient vibration measurements in the southern rhine graben close to basle |
| topic | H/V ratio ambient vibration array analysis fundamental frequency Rhine Rift Valley |
| url | http://www.annalsofgeophysics.eu/index.php/annals/article/view/3374 |
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