Infrasound from thunder: A natural seismic source

Ting L. Lin, Charles A. Langston

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article numberL14304
JournalGeophysical Research Letters
Volume34
Issue number14
DOIs
Publication statusPublished - 2007 Jul 28

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

Fingerprint Dive into the research topics of 'Infrasound from thunder: A natural seismic source'. Together they form a unique fingerprint.

Cite this