Investigation of Seismic Waves Excited by Artificial Sources

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Rubric:     Theoretical and experimental studies   
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In spite of breakthrough in the field of engineering seismology a lot in the features of generation and identification of S waves still remains little-known. Seismic waves excited by artificial sources are considered in the article. Explorations include field investigations realized by the author in previous decades. One of the major problems is still a reliable identification of S waves. Thereby the phase inverse phenomenon of S waves generated by horizontal source in different types of soils was considered. The examples of the main types of seismic waves generated by vertical source by polarizing analysis method are given in the article.

Soils watering degree influence on the values of body seismic wave propagation velocities was investigated. Further a probabilistic assessment of the values of seismic wave velocities in different soil types was carried out. Obtained by the author empirical relations for soils density dependence on S-wave velocities in these soils are given in the article.