TY  - JOUR
A1  - Lontsi, Agostiny Marrios
A1  - Ohrnberger, Matthias
A1  - Krüger, Frank
A1  - Sánchez-Sesma, Francisco José
T1  - Combining surface-wave phase-velocity dispersion curves and full microtremor horizontal-to-vertical spectral ratio for subsurface sedimentary site characterization
JF  - Interpretation : a journal of subsurface characterization
N2  - We compute seismic velocity profiles by a combined inversion of surface-wave phase-velocity dispersion curves together with the full spectrum of the microtremor horizontal-to-vertical (H/V) spectral ratio at two sediment-covered sites in Germany. The sediment deposits are approximately 100 m thick at the first test site and approximately 400 m thick at the second test site. We have used an extended physical model based on the diffuse wavefield assumption for the interpretation of the observed microtremor H/V spectral ratio. The extension includes the interpretation of the microtremor H/V spectral ratio observed at depth (in boreholes). This full-wavefield approach accounts for the energy contribution from the body and surface waves, and thus it allows for inverting the properties of the shallow subsurface. We have obtained the multimode phase velocity dispersion curves from an independent study, and a description of the extracted branches and their interpretation was developed. The inversion results indicate that the combined approach using seismic ambient noise and actively generated surface-wave data will improve the accuracy of the reconstructed near-surface velocity model, a key step in microzonation, geotechnical engineering, seismic statics corrections, and reservoir imaging.
Y1  - 2016
U6  - https://doi.org/10.1190/INT-2016-0021.1
SN  - 2324-8858
SN  - 2324-8866
VL  - 4
SP  - SQ41
EP  - SQ49
PB  - Society of Exploration Geophysicists
CY  - Tulsa
ER  -