The Use of Ambient Seismic Noise Measurements for the Estimation of Surface Soil Effects: The Motril City Case (Southern Spain)

2004 ◽  
Vol 161 (7) ◽  
pp. 1549-1559 ◽  
Author(s):  
Z. Al Yuncha ◽  
F. Luz�n ◽  
A. Posadas ◽  
J. Mart�n ◽  
G. Alguacil ◽  
...  
Keyword(s):  
Seismic Noise ◽  
Surface Soil ◽  
Southern Spain ◽  
Ambient Seismic Noise ◽  
Noise Measurements ◽  
Soil Effects

Toward Seismic Microzonation—2-D Modeling and Ambient Seismic Noise Measurements: The Case of an Embanked, Deep Alpine Valley

2005 ◽  
Vol 21 (3) ◽  
pp. 635-651 ◽  
Author(s):  
Corine Frischknecht ◽  
Philippe Rosset ◽  
Jean-Jacques Wagner
Keyword(s):  
Resonant Frequency ◽  
Seismic Noise ◽  
Ambient Seismic Noise ◽  
Alpine Valley ◽  
Noise Measurements ◽  
Soil Site ◽  
Surficial Deposit ◽  
The One ◽  
Shape Ratio ◽  
Subsurface Geometry

In the Sion area of Switzerland, part of a deep, embanked sediment-filled valley, investigations on soil site effects have been conducted using two independent methods. Two-dimensional (2-D) modeling was performed with a program based on the Indirect Boundary Element Method (Pedersen et. al. 1994). Numerical simulations allow taking into account the subsurface geometry of the valley and its peculiar characteristics, such as a variable shape ratio and a high shear-wave velocity contrast. The H/V method has been applied on ambient seismic noise measurements recorded on sites as close as possible to the 2-D modeling. This technique allows capturing the fundamental resonant frequency of the deepest sediments as well as identifying the existence of a surficial deposit. Both approaches agree on the fact that the fundamental resonant frequency of the valley is below 1 Hz. The amplification level of the predominant frequency obtained with numerical simulation is up to two times higher than the one given by the H/V ratio. These results provide the basis for further investigations in order to resolve differences.

Surface Soil Effects Study Using Short-period Microtremor Observations in Almería City, Southern Spain

2001 ◽  
Vol 158 (12) ◽  
pp. 2481-2497 ◽  
Author(s):  
M. Navarro ◽  
T. Enomoto ◽  
F. J. Sánchez ◽  
I. Matsuda ◽  
T. Iwatate ◽  
...  
Keyword(s):  
Surface Soil ◽  
Southern Spain ◽  
Short Period ◽  
Soil Effects

Surface Soil Effects Study Using Short-period Microtremor Observations in Almería City, Southern Spain

2002 ◽  
pp. 2481-2497
Author(s):  
M. Navarro ◽  
T. Enomoto ◽  
F. J. Sánchez ◽  
I. Matsuda ◽  
T. Iwatate ◽  
...  
Keyword(s):  
Surface Soil ◽  
Southern Spain ◽  
Short Period ◽  
Soil Effects

scholarly journals Landslide geometry and activity in Villa de la Independencia (Bolivia) revealed by InSAR and seismic noise measurements

Landslides ◽  
2021 ◽  
Author(s):  
Chuang Song ◽  
Chen Yu ◽  
Zhenhong Li ◽  
Veronica Pazzi ◽  
Matteo Del Soldato ◽  
...  
Keyword(s):  
Time Series ◽  
Seismic Noise ◽  
Slip Surface ◽  
Inversion Method ◽  
Subsurface Structures ◽  
Slip Surfaces ◽  
Landslide Volume ◽  
Noise Measurements ◽  
Landslide Body

AbstractInterferometric Synthetic Aperture Radar (InSAR) enables detailed investigation of surface landslide movements, but it cannot provide information about subsurface structures. In this work, InSAR measurements were integrated with seismic noise in situ measurements to analyse both the surface and subsurface characteristics of a complex slow-moving landslide exhibiting multiple failure surfaces. The landslide body involves a town of around 6000 inhabitants, Villa de la Independencia (Bolivia), where extensive damages to buildings have been observed. To investigate the spatial-temporal characteristics of the landslide motion, Sentinel-1 displacement time series from October 2014 to December 2019 were produced. A new geometric inversion method is proposed to determine the best-fit sliding direction and inclination of the landslide. Our results indicate that the landslide is featured by a compound movement where three different blocks slide. This is further evidenced by seismic noise measurements which identified that the different dynamic characteristics of the three sub-blocks were possibly due to the different properties of shallow and deep slip surfaces. Determination of the slip surface depths allows for estimating the overall landslide volume (9.18 · 107 m3). Furthermore, Sentinel-1 time series show that the landslide movements manifest substantial accelerations in early 2018 and 2019, coinciding with increased precipitations in the late rainy season which are identified as the most likely triggers of the observed accelerations. This study showcases  the potential of integrating InSAR and seismic noise techniques to understand the landslide mechanism from ground to subsurface.

scholarly journals Surface wave dispersion measurements from ambient seismic noise analysis in Italy

2010 ◽  
Vol 180 (3) ◽  
pp. 1242-1252 ◽  
Author(s):  
Hongyi Li ◽  
Fabrizio Bernardi ◽  
Alberto Michelini
Keyword(s):  
Surface Wave ◽  
Seismic Noise ◽  
Noise Analysis ◽  
Wave Dispersion ◽  
Ambient Seismic Noise ◽  
Surface Wave Dispersion
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