1887

Abstract

Various studies operate seismic methods for imaging landslide structures. All those methods are more or less based on strong approximations and require complex data preprocessing. The issue of recovering the structural image of a landslide from the seismic velocity field estimated with an accurate, but not too unstable, method is thus posed. To solve it, we choose to revisit first arrival tomography approach which is a good compromise between the strong assumptions featuring simple refraction methods and the complexity of Full-Wave Inversion approach when used in very heterogeneous soils. The proposed method is based on a Quasi-Newton formulation to ensure an optimum convergence of the velocity model. We only use here the first arrivals of the seismic signal due to direct or refracted waves. Nevertheless, we show that some regularization strategies (Fresnel volumes approach, increasing finite frequencies) allow detecting sharp velocity variations tending to reach FWI performances.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.20143335
2012-09-03
2024-03-29
Loading full text...

Full text loading...

http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.20143335
Loading
This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error