Magnitude analysis of aftershocks of the Mw 9.3 Sumatra-Andaman Earthquake recorded at the temporary PSU Seismic Station in Phang nga, Thailand
After the M<sub>w</sub> 9.3 Sumatra-Andaman Earthquake on 26 December 2004, a temporary broadband seismic station was set up at the Khao Chang Telecommunication Station in Phang nga Province, Southern Thailand, in order to monitor aftershocks in an area bounded by 0<sup>o</sup&g...
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| Format: | Article |
| Language: | English |
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Prince of Songkla University
2008-03-01
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| Series: | Songklanakarin Journal of Science and Technology (SJST) |
| Subjects: | |
| Online Access: | http://rdo.psu.ac.th/sjst/ejournal/journal/30-2/0125-3395-30-2-191-199.pdf |
| _version_ | 1819099440502276096 |
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| author | Helmut Düerrast Warawutti Lohawijarn Nawarat Setapong, |
| author_facet | Helmut Düerrast Warawutti Lohawijarn Nawarat Setapong, |
| author_sort | Helmut Düerrast |
| collection | DOAJ |
| description | After the M<sub>w</sub> 9.3 Sumatra-Andaman Earthquake on 26 December 2004, a temporary broadband seismic station was set up at the Khao Chang Telecommunication Station in Phang nga Province, Southern Thailand, in order to monitor aftershocks in an area bounded by 0<sup>o</sup>-20<sup>o</sup> N, and 90<sup>o</sup>-100<sup>o</sup> E. Altogether 98 events were identified during the study period from 1<sup>st</sup> to 12<sup>th</sup> January 2005; but six of these events are not listed in the catalog of the United States Geological Survey (USGS/ NEIC). Body wave magnitudes (m<sub>b</sub>) and moment magnitudes (M<sub>w</sub>) of the events were determined and compared with USGS magnitudes. For m<sub>b</sub>, the PSU values are 0.215 higher than the USGS values, whereas for M<sub>w</sub>, the PSU values are 0.268 lower than the USGS values. Differences in m<sub>b</sub> may result from differences in time windows chosen for the maximum amplitude determination, or from accuracy of the Q-value. Differences in M<sub>w</sub> may result from assumptions made on velocity, attenuation and determination of the low-frequency part of the seismic spectrum. However, these differences are comparatively small considering that the USGS data are network values whereas the PSU data are from a single station. |
| first_indexed | 2024-12-22T00:46:55Z |
| format | Article |
| id | doaj.art-8f0fcbe9eb444527a60c843929790b35 |
| institution | Directory Open Access Journal |
| issn | 0125-3395 |
| language | English |
| last_indexed | 2024-12-22T00:46:55Z |
| publishDate | 2008-03-01 |
| publisher | Prince of Songkla University |
| record_format | Article |
| series | Songklanakarin Journal of Science and Technology (SJST) |
| spelling | doaj.art-8f0fcbe9eb444527a60c843929790b352022-12-21T18:44:32ZengPrince of Songkla UniversitySongklanakarin Journal of Science and Technology (SJST)0125-33952008-03-01302191199Magnitude analysis of aftershocks of the Mw 9.3 Sumatra-Andaman Earthquake recorded at the temporary PSU Seismic Station in Phang nga, ThailandHelmut DüerrastWarawutti LohawijarnNawarat Setapong,After the M<sub>w</sub> 9.3 Sumatra-Andaman Earthquake on 26 December 2004, a temporary broadband seismic station was set up at the Khao Chang Telecommunication Station in Phang nga Province, Southern Thailand, in order to monitor aftershocks in an area bounded by 0<sup>o</sup>-20<sup>o</sup> N, and 90<sup>o</sup>-100<sup>o</sup> E. Altogether 98 events were identified during the study period from 1<sup>st</sup> to 12<sup>th</sup> January 2005; but six of these events are not listed in the catalog of the United States Geological Survey (USGS/ NEIC). Body wave magnitudes (m<sub>b</sub>) and moment magnitudes (M<sub>w</sub>) of the events were determined and compared with USGS magnitudes. For m<sub>b</sub>, the PSU values are 0.215 higher than the USGS values, whereas for M<sub>w</sub>, the PSU values are 0.268 lower than the USGS values. Differences in m<sub>b</sub> may result from differences in time windows chosen for the maximum amplitude determination, or from accuracy of the Q-value. Differences in M<sub>w</sub> may result from assumptions made on velocity, attenuation and determination of the low-frequency part of the seismic spectrum. However, these differences are comparatively small considering that the USGS data are network values whereas the PSU data are from a single station.http://rdo.psu.ac.th/sjst/ejournal/journal/30-2/0125-3395-30-2-191-199.pdfEarthquakebody wave magnitudemoment magnitudeSumatra-Andaman Earthquaketsunami warning |
| spellingShingle | Helmut Düerrast Warawutti Lohawijarn Nawarat Setapong, Magnitude analysis of aftershocks of the Mw 9.3 Sumatra-Andaman Earthquake recorded at the temporary PSU Seismic Station in Phang nga, Thailand Songklanakarin Journal of Science and Technology (SJST) Earthquake body wave magnitude moment magnitude Sumatra-Andaman Earthquake tsunami warning |
| title | Magnitude analysis of aftershocks of the Mw 9.3 Sumatra-Andaman Earthquake recorded at the temporary PSU Seismic Station in Phang nga, Thailand |
| title_full | Magnitude analysis of aftershocks of the Mw 9.3 Sumatra-Andaman Earthquake recorded at the temporary PSU Seismic Station in Phang nga, Thailand |
| title_fullStr | Magnitude analysis of aftershocks of the Mw 9.3 Sumatra-Andaman Earthquake recorded at the temporary PSU Seismic Station in Phang nga, Thailand |
| title_full_unstemmed | Magnitude analysis of aftershocks of the Mw 9.3 Sumatra-Andaman Earthquake recorded at the temporary PSU Seismic Station in Phang nga, Thailand |
| title_short | Magnitude analysis of aftershocks of the Mw 9.3 Sumatra-Andaman Earthquake recorded at the temporary PSU Seismic Station in Phang nga, Thailand |
| title_sort | magnitude analysis of aftershocks of the mw 9 3 sumatra andaman earthquake recorded at the temporary psu seismic station in phang nga thailand |
| topic | Earthquake body wave magnitude moment magnitude Sumatra-Andaman Earthquake tsunami warning |
| url | http://rdo.psu.ac.th/sjst/ejournal/journal/30-2/0125-3395-30-2-191-199.pdf |
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