Using microtremor data to obtain dynamic properties of soils in the Veracruz-Boca del Rio metropolitan area
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View abstract on PubMed
Summary
This summary is machine-generated.Microtremor measurements in Veracruz reveal soil characteristics crucial for seismic microzonation. H/V spectral ratios provide insights for designing earthquake-resistant structures and classifying soil dynamics.
Area Of Science
- Geophysics
- Seismology
- Engineering Seismology
Background
- Microtremor measurements offer a non-invasive method for characterizing subsurface soil properties.
- Understanding soil dynamics is critical for seismic hazard assessment and urban planning in earthquake-prone regions.
Purpose Of The Study
- To analyze microtremor data to determine soil types and their dynamic properties in the Veracruz-Boca del Río metropolitan area.
- To generate data applicable for seismic microzonation and the design of earthquake-resistant structures.
Main Methods
- Acquisition of raw microtremor data using a GÜRALP 6TD broadband seismometer at 44 locations.
- Calculation of Horizontal-to-Vertical (H/V) spectral ratios using Nakamura's method.
- Development of one-dimensional (1D) stratigraphic soil models from H/V ratios.
Main Results
- Classification of three distinct soil types based on their fundamental vibration frequencies.
- H/V spectral ratios approximated the site's transfer function, correlating sediment and rigid stratum responses.
- 1D soil models yielded key parameters: layer thickness, primary wave (Vp) and secondary wave (Vs) velocities, and density.
Conclusions
- The H/V spectral ratios serve as a valuable tool for seismic microzonation and seismic design spectra.
- The derived soil models enable dynamic soil classification according to Mexican technical codes.
- This study provides essential geophysical data for enhancing seismic resilience in the studied metropolitan area.
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