Case Studies and White Papers

 

Seismic P-wave Polarization In The Context Of On-site Early Warning System

Fifth International Conference on Recent Advences in Geotechnical Earthquake Engineering and Soil Dynamics - My 24-29, 2010, San Diego, California

 

Detecting Fronts of Elastic Wave Using 3C Sensor

Elastic body waves are related to di latational and shear components of the displacement field. Wavefront detection and phase characterization are better achieved with the 3C sensors, which allow use of polarization analysis. Separation of components into stationary and random is achieved with the higher statistical moments of the time-frequency distributions. Similar statistics can be used as a triggering criterion instead of conventional averaged time window ratios.