English
 
Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
Add to Basket
 Local TagsRelease HistoryDetailsSummary
  Application of seismic data to non-earthquake studies: thunder-source inversion and realtime economic growth estimation

Hong, T.-K., Park, S., Lee, J., Lee, J., Kim, B. (2023): Application of seismic data to non-earthquake studies: thunder-source inversion and realtime economic growth estimation, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-3745

Item is

 

show all hide all

Basic

show hide
Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020799 Version Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020799_2
Genre: Conference Paper

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Hong, Tae-Kyung1, Author
Park, Seongjun1, Author
Lee, Junhyung1, Author
Lee, Jeongin1, Author
Kim, Byeongwoo1, Author
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

Content

show
hide
Free keywords: -
 Abstract: Seismic stations are operated 24 hours, recording groundmotions by various non-earthquake sources continuously.Meteorological phenomena and human activities areexamples of non-earthquakes. The rapid air expansion bylightning produces a shockwave that creates a cracksound, thunder. Thunder-induced seismic waves recorded atdense seismic stations in Seoul, South Korea are analysedfor inversion of thunder source spectra. Thethunder-induced seismic signals were well identified atdistances of < ~20 km. In the course of source-spectralinversion, the propagation and acoustic-to-seismiccoupling effects are counted. Direct acoustic-to-seismiccoupled seismic waves present apparent phase velocitiesof sound speed in atmosphere. Thunder-induced seismicwaves are dominant at high frequencies (>20 Hz). Thethunder-induced acoustic waves in the atmosphere areobtained by removing the acoustic-to-seismic couplingeffect and site-response effect from the observedthunder-induced seismic waves. The quality factors foracoustic wave attenuation in the atmosphere aredetermined. We determine acoustic thunder source spectraare determined by stacking the inverted acoustic spectra.Human activity is another major source of high-frequencyseismic noise. Analysis with seismic noises in threeconsecutive months of each year enables us to estimatethe noise levels without seasonal effects. The daytimeseismic noise-level changes in major cities of 11countries are assessed using the 3 month records fordecades. The annual seismic noise levels present strongcorrelations with gross domestic product (GDP),particularly with manufacturing and industrial GDP. Theseismic noise levels increase quickly with GDP in low GDPregions but slowly in high-GDP regions. The seismic noiselevels increased by 14 % to 111 % for 5-23 yr dependingon the economic conditions. The high-frequency noiselevel may be a proxy to present the economic condition.

Details

show
hide
Language(s): eng - English
 Dates: 2023-07-112023-07-11
 Publication Status: Finally published
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.57757/IUGG23-3745
 Degree: -

Event

show
hide
Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Place of Event: Berlin
Start-/End Date: 2023-07-11 - 2023-07-20

Legal Case

show

Project information

show

Source 1

show
hide
Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Source Genre: Proceedings
 Creator(s):
Affiliations:
Publ. Info: Potsdam : GFZ German Research Centre for Geosciences
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: -