Characterizing Thunder-Induced Ground Motions Using Fiber-Optic Distributed Acoustic Sensing Array

Tieyuan Zhu, David J. Stensrud

Research output: Contribution to journalArticle

Abstract

We report for the first time on a distributed acoustic sensing (DAS) array using preexisting underground fiber optics beneath the Penn State campus for detecting and characterizing thunder-induced ground motions. During a half-hour interval from 03:20–03:50 UTC on 15 April 2019 in State College, PA, we identify 18 thunder-induced seismic events in the DAS array data. The high-fidelity DAS data show that the thunder-induced seismics are very broadband, with their peak frequency ranging from 20 to 130 Hz. We use arrival times of the 18 events to estimate the phase velocity of the near surface, the back azimuth, and location of thunder-seismic sources that are verified with lightning locations from the National Lightning Detection Network. Furthermore, the dense DAS data enable us to simulate thunder-seismic wave propagation and full waveform synthetics and further locate the thunder-seismic source by time-reversal migration. Interestingly, we found that thunder-seismic power recorded by DAS is positively correlated with National Lightning Detection Network lightning current power. These findings suggest that fiber-optic DAS observations may offer a new avenue of studying thunder-induced seismics, characterizing the near-surface velocity structure, and probing the thunder-ground coupling process.

Original languageEnglish (US)
Pages (from-to)12810-12823
Number of pages14
JournalJournal of Geophysical Research: Atmospheres
Volume124
Issue number23
DOIs
StatePublished - Dec 16 2019

Fingerprint

fiber optics
ground motion
Fiber optics
lightning
acoustics
Acoustics
Lightning
seismic source
Seismic waves
Phase velocity
phase velocity
arrival time
velocity structure
seismic wave
azimuth
Wave propagation
wave propagation
seismic waves
arrivals
waveforms

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

Cite this

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abstract = "We report for the first time on a distributed acoustic sensing (DAS) array using preexisting underground fiber optics beneath the Penn State campus for detecting and characterizing thunder-induced ground motions. During a half-hour interval from 03:20–03:50 UTC on 15 April 2019 in State College, PA, we identify 18 thunder-induced seismic events in the DAS array data. The high-fidelity DAS data show that the thunder-induced seismics are very broadband, with their peak frequency ranging from 20 to 130 Hz. We use arrival times of the 18 events to estimate the phase velocity of the near surface, the back azimuth, and location of thunder-seismic sources that are verified with lightning locations from the National Lightning Detection Network. Furthermore, the dense DAS data enable us to simulate thunder-seismic wave propagation and full waveform synthetics and further locate the thunder-seismic source by time-reversal migration. Interestingly, we found that thunder-seismic power recorded by DAS is positively correlated with National Lightning Detection Network lightning current power. These findings suggest that fiber-optic DAS observations may offer a new avenue of studying thunder-induced seismics, characterizing the near-surface velocity structure, and probing the thunder-ground coupling process.",
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Characterizing Thunder-Induced Ground Motions Using Fiber-Optic Distributed Acoustic Sensing Array. / Zhu, Tieyuan; Stensrud, David J.

In: Journal of Geophysical Research: Atmospheres, Vol. 124, No. 23, 16.12.2019, p. 12810-12823.

Research output: Contribution to journalArticle

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