Infrasound from thunder: A natural seismic source

Ting L. Lin, Charles A. Langston

研究成果: Article同行評審

15 引文 斯高帕斯(Scopus)

摘要

A small array consisting of five three-component short-period surface seismometers, a three-component borehole seismometer, and five infrasound microphones was built to investigate thunder-induced ground motions. Data from two thunder events with similar N-wave waveforms but different horizontal slownesses are chosen as examples of data collected by the array. These impulsive acoustic waves excited P and S reverberations in the near surface that depend on both the incident wave horizontal slowness and the velocity structure in the upper 30 meters at the site. Although the depth of the borehole is relatively shallow compared to a seismic wave wavelength, velocity amplitude in the radial component decays as much as 63 percent with depth but vertical component amplitudes are unaffected consistent with air-coupled Rayleigh wave excitation. Naturally occurring thunder appears to be a useful seismic source to empirically determine site resonance charactistics for hazards assessments.

原文English
文章編號L14304
期刊Geophysical Research Letters
34
發行號14
DOIs
出版狀態Published - 2007 七月 28

All Science Journal Classification (ASJC) codes

  • 地球物理
  • 地球與行星科學(全部)

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