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RESEARCH PRODUCT
Assessment of the Reliability of the SPAC Method in Urban Areas
Antonino D'alessandoDario LuzioRaffaele MartoranaPatrizia Capizzisubject
Regional geologyEnvironmental EngineeringEngineering geologySampling (statistics)Seismic noiseGeotechnical Engineering and Engineering GeologyPhysics::Classical PhysicsAzimuthSettore GEO/11 - Geofisica ApplicataMicrotremorAnisotropyGeophysicGeomorphologyReliability (statistics)GeologySeismologydescription
We have carried out several long-term measures of seismic noise with triangular arrays of broad-band seismic sensors, to investigate the reliability of the SPAC method in urban areas. We investigate the stationary and anisotropy of the microtremor wave field. We have found that the anisotropy of the microtremor wave field can be evaluated analyzing the HVNSR as function the azimuth. Furthermore, we showed as strong anisotropies in the microtremors are often observable in particular at high frequencies (> 1 Hz). We have verified as microtremors can be difficult to considered as ergodic processes, and for this reason time averaging, also even over a long periods of time, cannot replace an appropriate azimuthal sampling.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-09-06 | Near Surface Geoscience 2015 - 21st European Meeting of Environmental and Engineering Geophysics |