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Investigation of possible ULF variations due to earthquake event using wavelet technique / Farah Adilah Mohd. Kasran

Anomalous geomagnetic variations measured on the ground surface are not constant and generally, it might be triggered from external or internal sources with respect to the earth's surface. This paper will focus on the anomalous variations from internal sources due to earthquake event (Mw = 6.4)...

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Main Author: Mohd. Kasran, Farah Adilah
Format: Thesis
Language:English
Published: 2014
Subjects:
Geomagnetism
QE Geology
Online Access:https://ir.uitm.edu.my/id/eprint/67657/1/67657.PDF
https://ir.uitm.edu.my/id/eprint/67657/
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spelling my.uitm.ir.676572022-10-20T08:20:17Z https://ir.uitm.edu.my/id/eprint/67657/ Investigation of possible ULF variations due to earthquake event using wavelet technique / Farah Adilah Mohd. Kasran Mohd. Kasran, Farah Adilah Geomagnetism QE Geology Anomalous geomagnetic variations measured on the ground surface are not constant and generally, it might be triggered from external or internal sources with respect to the earth's surface. This paper will focus on the anomalous variations from internal sources due to earthquake event (Mw = 6.4) that hit eastern part of Taiwan at ap proximate depth of 45km on 19th December 2009. With distance about 20km from epicenter, the geomagnetic data from MAGDAS network at Hualien station (HLN) has been recorded in order to monitor the variations based on north-south (H-component)and vertical (Z-component). The wavelet transform is used to extract ULF signature associated with earthquake event. Wavelet transform (DWT and CWT) can decompose geomagnetic data into certain time and frequency range and it is approximated that the ULF variations can be observed before and after the event. From the results, the perturbations of ULF variations can be observed several days before the earthquake and lasted few weeks after. Besides, the pattern of the ULF polarization (Z/H) of thePc3 amplitude and the ratio of H-component from two different stations show the sudden changes a few days preceding the earthquake. These facts demonstrate the validity of wavelet transform to investigate the possible ULF variations related with earthquake. 2014 Thesis NonPeerReviewed text en https://ir.uitm.edu.my/id/eprint/67657/1/67657.PDF Investigation of possible ULF variations due to earthquake event using wavelet technique / Farah Adilah Mohd. Kasran. (2014) Masters thesis, thesis, Universiti Teknologi MARA (UiTM).
institution Universiti Teknologi Mara
building Tun Abdul Razak Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Mara
content_source UiTM Institutional Repository
url_provider http://ir.uitm.edu.my/
language English
topic Geomagnetism
QE Geology
spellingShingle Geomagnetism
QE Geology
Mohd. Kasran, Farah Adilah
Investigation of possible ULF variations due to earthquake event using wavelet technique / Farah Adilah Mohd. Kasran
description Anomalous geomagnetic variations measured on the ground surface are not constant and generally, it might be triggered from external or internal sources with respect to the earth's surface. This paper will focus on the anomalous variations from internal sources due to earthquake event (Mw = 6.4) that hit eastern part of Taiwan at ap proximate depth of 45km on 19th December 2009. With distance about 20km from epicenter, the geomagnetic data from MAGDAS network at Hualien station (HLN) has been recorded in order to monitor the variations based on north-south (H-component)and vertical (Z-component). The wavelet transform is used to extract ULF signature associated with earthquake event. Wavelet transform (DWT and CWT) can decompose geomagnetic data into certain time and frequency range and it is approximated that the ULF variations can be observed before and after the event. From the results, the perturbations of ULF variations can be observed several days before the earthquake and lasted few weeks after. Besides, the pattern of the ULF polarization (Z/H) of thePc3 amplitude and the ratio of H-component from two different stations show the sudden changes a few days preceding the earthquake. These facts demonstrate the validity of wavelet transform to investigate the possible ULF variations related with earthquake.
format Thesis
author Mohd. Kasran, Farah Adilah
author_facet Mohd. Kasran, Farah Adilah
author_sort Mohd. Kasran, Farah Adilah
title Investigation of possible ULF variations due to earthquake event using wavelet technique / Farah Adilah Mohd. Kasran
title_short Investigation of possible ULF variations due to earthquake event using wavelet technique / Farah Adilah Mohd. Kasran
title_full Investigation of possible ULF variations due to earthquake event using wavelet technique / Farah Adilah Mohd. Kasran
title_fullStr Investigation of possible ULF variations due to earthquake event using wavelet technique / Farah Adilah Mohd. Kasran
title_full_unstemmed Investigation of possible ULF variations due to earthquake event using wavelet technique / Farah Adilah Mohd. Kasran
title_sort investigation of possible ulf variations due to earthquake event using wavelet technique / farah adilah mohd. kasran
publishDate 2014
url https://ir.uitm.edu.my/id/eprint/67657/1/67657.PDF
https://ir.uitm.edu.my/id/eprint/67657/
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score 13.211869

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