Wavefield composition analysis from three-component beamforming improves thickness estimates of sedimentary layers

• DOI: 10.3997/2214-4609.2023101004
• Publication Date: 2023-05-25T02:03:11Z
• Authors: E. Obiri; K. Löer; C. Finger
• Keywords: Rayleigh Wave; Seismic Noise; Component (thermodynamics); Ambient noise level

Summary Seismic ambient methods have proven increasingly useful for site characterisation and seismic hazard assessment. Methods such as the Horizontal-to-Vertical Spectral Ratio (HVSR) technique been used to determine resonance frequency of shallow sedimentary layer. In this abstract, we use a three-component beamforming algorithm decipher composition noise. We show that by doing that, can better understand major contributor HVSR curve subsequently map thickness top layer either Love wave frequencies or Rayleigh frequency.