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
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id	my-uitm-ir.67657
record_format	uketd_dc
spelling	my-uitm-ir.676572022-10-20T08:20:17Z Investigation of possible ULF variations due to earthquake event using wavelet technique / Farah Adilah Mohd. Kasran 2014 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 https://ir.uitm.edu.my/id/eprint/67657/ https://ir.uitm.edu.my/id/eprint/67657/1/67657.PDF text en public masters Universiti Teknologi MARA (UiTM) Faculty of Electrical Engineering Ya'acob, Norsuzila
institution	Universiti Teknologi MARA
collection	UiTM Institutional Repository
language	English
advisor	Ya'acob, Norsuzila
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
qualification_level	Master's degree
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
granting_institution	Universiti Teknologi MARA (UiTM)
granting_department	Faculty of Electrical Engineering
publishDate	2014
url	https://ir.uitm.edu.my/id/eprint/67657/1/67657.PDF
_version_	1783735710635786240

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

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