Comparison of point and array-computed rotations for the TAIGER explosions of 4 March 2008
Two large explosions were recorded by a dense array of strong-motion accelerometers and rotational seismometers in northeastern Taiwan associated with a Taiwan Integrated Geodynamics Research long-range refraction experiment. The objective of this experiment was to test the response of the experimen...
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| Veröffentlicht in: | Journal of seismology 2012-10, Vol.16 (4), p.733-743 |
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| creator | Kendall, Lauren M. Langston, Charles A. Lee, W. H. K. Lin, C. J. Liu, C. C. |
| description | Two large explosions were recorded by a dense array of strong-motion accelerometers and rotational seismometers in northeastern Taiwan associated with a Taiwan Integrated Geodynamics Research long-range refraction experiment. The objective of this experiment was to test the response of the experimental eentec rotational seismometers against calculated array rotations. Computed array rotation rates are seen to have little variation across the array, but point rotation rate measurements obtained from individual rotational seismometers show significant deviations with each other and with the array rotation rates in the ranges of 3–5 Hz and, especially, 3–50 Hz. A cross-correlation method was used to compare array-computed rotation rates and point rotation rate measurements in the frequency band of 3–5 Hz with the result that the absolute value of the normalized maximum correlation coefficient for each station set varied from 0.45 to 0.97 with an average of 0.84. Amplitude differences of the point rotation rate measurements are seen to be factors of 0.2 to 1.8 times the array rotations as well. It is not likely that the differences seen in the point and array-computed rotation rates are due to nonlinear or heterogeneous site conditions under each array element since these effects should also be seen in the acceleration data used to determine rotation rate. A rigorous method for accurately calibrating rotation rate instruments is needed to understand their response in the field. |
| doi_str_mv | 10.1007/s10950-012-9297-4 |
| format | Article |
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H. K. ; Lin, C. J. ; Liu, C. C.</creator><creatorcontrib>Kendall, Lauren M. ; Langston, Charles A. ; Lee, W. H. K. ; Lin, C. J. ; Liu, C. C.</creatorcontrib><description>Two large explosions were recorded by a dense array of strong-motion accelerometers and rotational seismometers in northeastern Taiwan associated with a Taiwan Integrated Geodynamics Research long-range refraction experiment. The objective of this experiment was to test the response of the experimental eentec rotational seismometers against calculated array rotations. Computed array rotation rates are seen to have little variation across the array, but point rotation rate measurements obtained from individual rotational seismometers show significant deviations with each other and with the array rotation rates in the ranges of 3–5 Hz and, especially, 3–50 Hz. A cross-correlation method was used to compare array-computed rotation rates and point rotation rate measurements in the frequency band of 3–5 Hz with the result that the absolute value of the normalized maximum correlation coefficient for each station set varied from 0.45 to 0.97 with an average of 0.84. Amplitude differences of the point rotation rate measurements are seen to be factors of 0.2 to 1.8 times the array rotations as well. It is not likely that the differences seen in the point and array-computed rotation rates are due to nonlinear or heterogeneous site conditions under each array element since these effects should also be seen in the acceleration data used to determine rotation rate. A rigorous method for accurately calibrating rotation rate instruments is needed to understand their response in the field.</description><identifier>ISSN: 1383-4649</identifier><identifier>EISSN: 1573-157X</identifier><identifier>DOI: 10.1007/s10950-012-9297-4</identifier><language>eng</language><publisher>Dordrecht: Springer Netherlands</publisher><subject>Accelerometers ; Arrays ; Calibration ; Correlation analysis ; Correlation coefficient ; Deviation ; Earth and Environmental Science ; Earth Sciences ; Earth, ocean, space ; Earthquakes, seismology ; Engineering and environment geology. Geothermics ; Exact sciences and technology ; Explosions ; Geophysics/Geodesy ; Geotechnical Engineering & Applied Earth Sciences ; Hydrogeology ; Instrumentation ; Internal geophysics ; Measuring instruments ; Natural hazards: prediction, damages, etc ; Original Article ; Rotational ; Seismic engineering ; Seismic phenomena ; Seismic response ; Seismology ; Structural Geology</subject><ispartof>Journal of seismology, 2012-10, Vol.16 (4), p.733-743</ispartof><rights>Springer Science+Business Media B.V. 2012</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c379t-addc2c17e952bbfd9165f0dd572b3a2b038c9f95b2b68c6b7f026b82cecaa463</citedby><cites>FETCH-LOGICAL-c379t-addc2c17e952bbfd9165f0dd572b3a2b038c9f95b2b68c6b7f026b82cecaa463</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s10950-012-9297-4$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s10950-012-9297-4$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>309,310,314,776,780,785,786,23909,23910,25118,27901,27902,41464,42533,51294</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=26375104$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Kendall, Lauren M.</creatorcontrib><creatorcontrib>Langston, Charles A.</creatorcontrib><creatorcontrib>Lee, W. H. K.</creatorcontrib><creatorcontrib>Lin, C. J.</creatorcontrib><creatorcontrib>Liu, C. C.</creatorcontrib><title>Comparison of point and array-computed rotations for the TAIGER explosions of 4 March 2008</title><title>Journal of seismology</title><addtitle>J Seismol</addtitle><description>Two large explosions were recorded by a dense array of strong-motion accelerometers and rotational seismometers in northeastern Taiwan associated with a Taiwan Integrated Geodynamics Research long-range refraction experiment. The objective of this experiment was to test the response of the experimental eentec rotational seismometers against calculated array rotations. Computed array rotation rates are seen to have little variation across the array, but point rotation rate measurements obtained from individual rotational seismometers show significant deviations with each other and with the array rotation rates in the ranges of 3–5 Hz and, especially, 3–50 Hz. A cross-correlation method was used to compare array-computed rotation rates and point rotation rate measurements in the frequency band of 3–5 Hz with the result that the absolute value of the normalized maximum correlation coefficient for each station set varied from 0.45 to 0.97 with an average of 0.84. Amplitude differences of the point rotation rate measurements are seen to be factors of 0.2 to 1.8 times the array rotations as well. It is not likely that the differences seen in the point and array-computed rotation rates are due to nonlinear or heterogeneous site conditions under each array element since these effects should also be seen in the acceleration data used to determine rotation rate. A rigorous method for accurately calibrating rotation rate instruments is needed to understand their response in the field.</description><subject>Accelerometers</subject><subject>Arrays</subject><subject>Calibration</subject><subject>Correlation analysis</subject><subject>Correlation coefficient</subject><subject>Deviation</subject><subject>Earth and Environmental Science</subject><subject>Earth Sciences</subject><subject>Earth, ocean, space</subject><subject>Earthquakes, seismology</subject><subject>Engineering and environment geology. Geothermics</subject><subject>Exact sciences and technology</subject><subject>Explosions</subject><subject>Geophysics/Geodesy</subject><subject>Geotechnical Engineering & Applied Earth Sciences</subject><subject>Hydrogeology</subject><subject>Instrumentation</subject><subject>Internal geophysics</subject><subject>Measuring instruments</subject><subject>Natural hazards: prediction, damages, etc</subject><subject>Original Article</subject><subject>Rotational</subject><subject>Seismic engineering</subject><subject>Seismic phenomena</subject><subject>Seismic response</subject><subject>Seismology</subject><subject>Structural Geology</subject><issn>1383-4649</issn><issn>1573-157X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNp1kF9LwzAUxYMoOKcfwLeACL5E86dtmscx5hxMBNmD-BLSNHEdXVOTFty3N7UiIvhy74XzO4fLAeCS4FuCMb8LBIsUI0woElRwlByBCUk5Q3G8HMeb5QwlWSJOwVkIO4yxyAWbgNe527fKV8E10FnYuqrpoGpKqLxXB6Sj2nemhN51qqtcE6B1HnZbAzez1XLxDM1HW7vwpUR_Ah-V11tIMc7PwYlVdTAX33sKNveLzfwBrZ-Wq_lsjTTjokOqLDXVhBuR0qKwpSBZanFZppwWTNECs1wLK9KCFlmus4JbTLMip9popZKMTcHNGNt6996b0Ml9FbSpa9UY1wdJCMsSkvB8QK_-oDvX-yY-JwlmnPOUcRIpMlLauxC8sbL11V75Q4TkULYcy5axbDmULZPouf5OVkGr2nrV6Cr8GGnGeErwwNGRC1Fq3oz__cF_4Z9hHo2g</recordid><startdate>20121001</startdate><enddate>20121001</enddate><creator>Kendall, Lauren M.</creator><creator>Langston, Charles A.</creator><creator>Lee, W. 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Geothermics</topic><topic>Exact sciences and technology</topic><topic>Explosions</topic><topic>Geophysics/Geodesy</topic><topic>Geotechnical Engineering & Applied Earth Sciences</topic><topic>Hydrogeology</topic><topic>Instrumentation</topic><topic>Internal geophysics</topic><topic>Measuring instruments</topic><topic>Natural hazards: prediction, damages, etc</topic><topic>Original Article</topic><topic>Rotational</topic><topic>Seismic engineering</topic><topic>Seismic phenomena</topic><topic>Seismic response</topic><topic>Seismology</topic><topic>Structural Geology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Kendall, Lauren M.</creatorcontrib><creatorcontrib>Langston, Charles A.</creatorcontrib><creatorcontrib>Lee, W. H. K.</creatorcontrib><creatorcontrib>Lin, C. J.</creatorcontrib><creatorcontrib>Liu, C. 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H. K.</au><au>Lin, C. J.</au><au>Liu, C. C.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Comparison of point and array-computed rotations for the TAIGER explosions of 4 March 2008</atitle><jtitle>Journal of seismology</jtitle><stitle>J Seismol</stitle><date>2012-10-01</date><risdate>2012</risdate><volume>16</volume><issue>4</issue><spage>733</spage><epage>743</epage><pages>733-743</pages><issn>1383-4649</issn><eissn>1573-157X</eissn><abstract>Two large explosions were recorded by a dense array of strong-motion accelerometers and rotational seismometers in northeastern Taiwan associated with a Taiwan Integrated Geodynamics Research long-range refraction experiment. The objective of this experiment was to test the response of the experimental eentec rotational seismometers against calculated array rotations. Computed array rotation rates are seen to have little variation across the array, but point rotation rate measurements obtained from individual rotational seismometers show significant deviations with each other and with the array rotation rates in the ranges of 3–5 Hz and, especially, 3–50 Hz. A cross-correlation method was used to compare array-computed rotation rates and point rotation rate measurements in the frequency band of 3–5 Hz with the result that the absolute value of the normalized maximum correlation coefficient for each station set varied from 0.45 to 0.97 with an average of 0.84. Amplitude differences of the point rotation rate measurements are seen to be factors of 0.2 to 1.8 times the array rotations as well. It is not likely that the differences seen in the point and array-computed rotation rates are due to nonlinear or heterogeneous site conditions under each array element since these effects should also be seen in the acceleration data used to determine rotation rate. A rigorous method for accurately calibrating rotation rate instruments is needed to understand their response in the field.</abstract><cop>Dordrecht</cop><pub>Springer Netherlands</pub><doi>10.1007/s10950-012-9297-4</doi><tpages>11</tpages></addata></record> |
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| subjects | Accelerometers Arrays Calibration Correlation analysis Correlation coefficient Deviation Earth and Environmental Science Earth Sciences Earth, ocean, space Earthquakes, seismology Engineering and environment geology. Geothermics Exact sciences and technology Explosions Geophysics/Geodesy Geotechnical Engineering & Applied Earth Sciences Hydrogeology Instrumentation Internal geophysics Measuring instruments Natural hazards: prediction, damages, etc Original Article Rotational Seismic engineering Seismic phenomena Seismic response Seismology Structural Geology |
| title | Comparison of point and array-computed rotations for the TAIGER explosions of 4 March 2008 |
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