Normalized polarization ratio analysis for ULF precursor detection of the 2009 M7.6 Sumatra and 2015 M6.8 Honshu earthquakes
The utilization of geomagnetic field data especially in the ultra-low frequency range has been shown by prior studies to have the potential to detect earthquake precursors. The most widely used signal processing method for this purpose is arguably the polarization ratio analysis. In this paper,...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Penerbit Universiti Kebangsaan Malaysia
2020
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| Online Access: | http://journalarticle.ukm.my/17358/ http://journalarticle.ukm.my/17358/1/06.pdf |
| _version_ | 1848814294788997120 |
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| author | Khairul Adib Yusof, Mardina Abdullah, Nurul Shazana Abdul Hamid, Ahadi, Suaidi Yoshikawa, Akimasa |
| author_facet | Khairul Adib Yusof, Mardina Abdullah, Nurul Shazana Abdul Hamid, Ahadi, Suaidi Yoshikawa, Akimasa |
| author_sort | Khairul Adib Yusof, |
| building | UKM Institutional Repository |
| collection | Online Access |
| description | The utilization of geomagnetic field data especially in the ultra-low frequency range has been shown by prior studies to
have the potential to detect earthquake precursors. The most widely used signal processing method for this purpose is
arguably the polarization ratio analysis. In this paper, the method was improved by introducing a new normalization
process with dissimilar ranges for the vertical and horizontal components. The normalized method was applied to
geomagnetic field data that were recorded at locations near the earthquakes which had occurred in Sumatra, Indonesia
on 30th September 2009 (M7.6) and Honshu, Japan on 12th May 2015 (M6.8) to evaluate the method’s reliability and
effectiveness in two different regions, i.e., the equatorial and mid-latitudinal regions. The results showed that the
precursors obtained from the normalized method were less disturbed by random fluctuations and had more
distinguishable amplitudes compared to the non-normalized classic method in both studied regions. |
| first_indexed | 2025-11-15T00:31:48Z |
| format | Article |
| id | oai:generic.eprints.org:17358 |
| institution | Universiti Kebangasaan Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T00:31:48Z |
| publishDate | 2020 |
| publisher | Penerbit Universiti Kebangsaan Malaysia |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | oai:generic.eprints.org:173582021-08-23T02:33:01Z http://journalarticle.ukm.my/17358/ Normalized polarization ratio analysis for ULF precursor detection of the 2009 M7.6 Sumatra and 2015 M6.8 Honshu earthquakes Khairul Adib Yusof, Mardina Abdullah, Nurul Shazana Abdul Hamid, Ahadi, Suaidi Yoshikawa, Akimasa The utilization of geomagnetic field data especially in the ultra-low frequency range has been shown by prior studies to have the potential to detect earthquake precursors. The most widely used signal processing method for this purpose is arguably the polarization ratio analysis. In this paper, the method was improved by introducing a new normalization process with dissimilar ranges for the vertical and horizontal components. The normalized method was applied to geomagnetic field data that were recorded at locations near the earthquakes which had occurred in Sumatra, Indonesia on 30th September 2009 (M7.6) and Honshu, Japan on 12th May 2015 (M6.8) to evaluate the method’s reliability and effectiveness in two different regions, i.e., the equatorial and mid-latitudinal regions. The results showed that the precursors obtained from the normalized method were less disturbed by random fluctuations and had more distinguishable amplitudes compared to the non-normalized classic method in both studied regions. Penerbit Universiti Kebangsaan Malaysia 2020 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/17358/1/06.pdf Khairul Adib Yusof, and Mardina Abdullah, and Nurul Shazana Abdul Hamid, and Ahadi, Suaidi and Yoshikawa, Akimasa (2020) Normalized polarization ratio analysis for ULF precursor detection of the 2009 M7.6 Sumatra and 2015 M6.8 Honshu earthquakes. Jurnal Kejuruteraan, 3 (1(SI)). pp. 35-41. ISSN 0128-0198 https://www.ukm.my/jkukm/si-31-2020/ |
| spellingShingle | Khairul Adib Yusof, Mardina Abdullah, Nurul Shazana Abdul Hamid, Ahadi, Suaidi Yoshikawa, Akimasa Normalized polarization ratio analysis for ULF precursor detection of the 2009 M7.6 Sumatra and 2015 M6.8 Honshu earthquakes |
| title | Normalized polarization ratio analysis for ULF precursor detection of the 2009 M7.6 Sumatra and 2015 M6.8 Honshu earthquakes |
| title_full | Normalized polarization ratio analysis for ULF precursor detection of the 2009 M7.6 Sumatra and 2015 M6.8 Honshu earthquakes |
| title_fullStr | Normalized polarization ratio analysis for ULF precursor detection of the 2009 M7.6 Sumatra and 2015 M6.8 Honshu earthquakes |
| title_full_unstemmed | Normalized polarization ratio analysis for ULF precursor detection of the 2009 M7.6 Sumatra and 2015 M6.8 Honshu earthquakes |
| title_short | Normalized polarization ratio analysis for ULF precursor detection of the 2009 M7.6 Sumatra and 2015 M6.8 Honshu earthquakes |
| title_sort | normalized polarization ratio analysis for ulf precursor detection of the 2009 m7.6 sumatra and 2015 m6.8 honshu earthquakes |
| url | http://journalarticle.ukm.my/17358/ http://journalarticle.ukm.my/17358/ http://journalarticle.ukm.my/17358/1/06.pdf |