The seismic signatures of the 2009 Shiaolin landslide in Taiwan

The Shiaolin landslide occurred on 9 August 2009 after Typhoon Morakot struck Taiwan, claiming over 400 lives. The seismic signals produced by the landslide were recorded by broadband seismic stations in Taiwan. The time-frequency spectra for these signals were obtained by the Hilbert-Huang transfor...

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Main Author: Z. Feng
Format: Article
Language:English
Published: Copernicus Publications 2011-05-01
Series:Natural Hazards and Earth System Sciences
Online Access:http://www.nat-hazards-earth-syst-sci.net/11/1559/2011/nhess-11-1559-2011.pdf
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spelling doaj-42290b8fd1bd4034b3033cfebb04afae2020-11-25T01:12:27ZengCopernicus PublicationsNatural Hazards and Earth System Sciences1561-86331684-99812011-05-011151559156910.5194/nhess-11-1559-2011The seismic signatures of the 2009 Shiaolin landslide in TaiwanZ. FengThe Shiaolin landslide occurred on 9 August 2009 after Typhoon Morakot struck Taiwan, claiming over 400 lives. The seismic signals produced by the landslide were recorded by broadband seismic stations in Taiwan. The time-frequency spectra for these signals were obtained by the Hilbert-Huang transform (HHT) and were analyzed to obtain the seismic characteristics of the landslide. Empirical mode decomposition (EMD) was applied to differentiate weak surface-wave signals from noise and to estimate the surface-wave velocities in the region. The surface-wave velocities were estimated using the fifth intrinsic mode function (IMF 5) obtained from the EMD. The spectra of the earthquake data were compared. The main frequency content of the seismic waves caused by the Shiaolin landslide were in the range of 0.5 to 1.5 Hz. This frequency range is smaller than the frequency ranges of other earthquakes. The spectral analysis of surface waves (SASW) method is suggested for characterizing the shear-wave velocities of the strata in the region.http://www.nat-hazards-earth-syst-sci.net/11/1559/2011/nhess-11-1559-2011.pdf
collection DOAJ
language English
format Article
sources DOAJ
author Z. Feng
spellingShingle Z. Feng
The seismic signatures of the 2009 Shiaolin landslide in Taiwan
Natural Hazards and Earth System Sciences
author_facet Z. Feng
author_sort Z. Feng
title The seismic signatures of the 2009 Shiaolin landslide in Taiwan
title_short The seismic signatures of the 2009 Shiaolin landslide in Taiwan
title_full The seismic signatures of the 2009 Shiaolin landslide in Taiwan
title_fullStr The seismic signatures of the 2009 Shiaolin landslide in Taiwan
title_full_unstemmed The seismic signatures of the 2009 Shiaolin landslide in Taiwan
title_sort seismic signatures of the 2009 shiaolin landslide in taiwan
publisher Copernicus Publications
series Natural Hazards and Earth System Sciences
issn 1561-8633
1684-9981
publishDate 2011-05-01
description The Shiaolin landslide occurred on 9 August 2009 after Typhoon Morakot struck Taiwan, claiming over 400 lives. The seismic signals produced by the landslide were recorded by broadband seismic stations in Taiwan. The time-frequency spectra for these signals were obtained by the Hilbert-Huang transform (HHT) and were analyzed to obtain the seismic characteristics of the landslide. Empirical mode decomposition (EMD) was applied to differentiate weak surface-wave signals from noise and to estimate the surface-wave velocities in the region. The surface-wave velocities were estimated using the fifth intrinsic mode function (IMF 5) obtained from the EMD. The spectra of the earthquake data were compared. The main frequency content of the seismic waves caused by the Shiaolin landslide were in the range of 0.5 to 1.5 Hz. This frequency range is smaller than the frequency ranges of other earthquakes. The spectral analysis of surface waves (SASW) method is suggested for characterizing the shear-wave velocities of the strata in the region.
url http://www.nat-hazards-earth-syst-sci.net/11/1559/2011/nhess-11-1559-2011.pdf
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