Toward a Single‐Station Approach for Microzonation: Using Vertical Rotation Rate to Estimate Love‐Wave Dispersion Curves and Direction Finding

2016 ◽  
Vol 106 (3) ◽  
pp. 1316-1330 ◽  
Author(s):  
Joachim Wassermann ◽  
Alexander Wietek ◽  
Celine Hadziioannou ◽  
Heiner Igel
Keyword(s):  
Rotation Rate ◽  
Love Wave ◽  
Wave Dispersion ◽  
Direction Finding ◽  
Dispersion Curves ◽  
Single Station ◽  
Love Wave Dispersion

Wave-equation dispersion inversion of Love waves

Geophysics ◽  
2019 ◽  
Vol 84 (5) ◽  
pp. R693-R705 ◽  
Author(s):  
Jing Li ◽  
Sherif Hanafy ◽  
Zhaolun Liu ◽  
Gerard T. Schuster
Keyword(s):  
Wave Equation ◽  
Wave Velocity ◽  
Rayleigh Waves ◽  
Love Wave ◽  
Field Data ◽  
Wave Dispersion ◽  
Dispersion Curves ◽  
Love Waves ◽  
S Wave ◽  
Love Wave Dispersion

We present a theory for wave-equation inversion of Love-wave dispersion curves, in which the misfit function is the sum of the squared differences between the wavenumbers along the predicted and observed dispersion curves. Similar to inversion of Rayleigh-wave dispersion curves, the complicated Love-wave arrivals in traces are skeletonized as simpler data, namely, the picked dispersion curves in the [Formula: see text] domain. Numerical solutions to the SH-wave equation and an iterative optimization method are then used to invert these dispersion curves for the S-wave velocity model. This procedure, denoted as wave-equation dispersion inversion of Love waves (LWD), does not require the assumption of a layered model or smooth velocity variations, and it is less prone to the cycle-skipping problems of full-waveform inversion. We demonstrate with synthetic and field data examples that LWD can accurately reconstruct the S-wave velocity distribution in a laterally heterogeneous medium. Compared with Rayleigh waves, inversion of the Love-wave dispersion curves empirically exhibits better convergence properties because they are completely insensitive to the P-velocity variations. In addition, Love-wave dispersion curves for our examples are simpler than those for Rayleigh waves, and they are easier to pick in our field data with a low signal-to-noise ratio.

Joint inversion of Rayleigh and Love wave dispersion curves for improving the accuracy of near-surface S-wave velocities

2020 ◽  
Vol 176 ◽  
pp. 103939
Author(s):  
Xiaofei Yin ◽  
Hongrui Xu ◽  
Binbin Mi ◽  
Xiaohan Hao ◽  
Peng Wang ◽  
...  
Keyword(s):  
Love Wave ◽  
Joint Inversion ◽  
Wave Dispersion ◽  
Dispersion Curves ◽  
S Wave ◽  
Near Surface ◽  
Wave Velocities ◽  
Love Wave Dispersion

Love-Wave dispersion and the structure of the Pacific Basin*

1954 ◽  
Vol 44 (1) ◽  
pp. 1-5
Author(s):  
Jack Foord Evernden
Keyword(s):  
Love Wave ◽  
Wave Dispersion ◽  
Love Waves ◽  
Pacific Basin ◽  
Layer Model ◽  
Basin Structure ◽  
Dispersion Data ◽  
The Pacific ◽  
Love Wave Dispersion

abstract By use of the Love-Wave dispersion data for the earthquake of 29 September 1946 (Lat. 5° S, Long. 154° E), a three-layer model of Pacific Basin structure has been derived. The periods of the Love Waves observed varied continuously from 45 seconds to 7 seconds. The model consists of: (a) 2.5 km. with VS equal to 2.31 km/sec.; (b) 11 km. with VS equal to 3.87 km/sec.; (c) bottom with VS equal to 4.52 km/sec. The differences between this model and that found by Raitt using refraction measurements are discussed.

Theoretical Love wave dispersion in a single layer model

1963 ◽  
Vol 55 (1) ◽  
pp. 16-20 ◽  
Author(s):  
Ravindra N. Gupta ◽  
Fraser S. Grant
Keyword(s):  
Love Wave ◽  
Single Layer ◽  
Wave Dispersion ◽  
Layer Model ◽  
Love Wave Dispersion ◽  
Single Layer Model
Sign in / Sign up

Export Citation Format

Share Document