| An examination of the presence and topography of the D＇＇ discontinuity under the Russia–Kazakhstan border region using seismic waveform data from a deep earthquake in Spain |
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| 作者姓名： | Xuzhang Shen ;Yuanze Zhou ;Koki Idehara ;Xiuping Mei ;Kangsheng Xu |
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| 作者单位： | [1]Lanzhou Institute of Seismology, China EarthquakeAdministration, Lanzhou 730000, China; [2]Key Lab of Computational Geodynamics of Chinese Academyof Sciences/College of Earth Science, University of ChineseAcademy of Sciences, Beijing 100049, China; [3]Earthquake Research Institute, Tokyo University, 1-1-1, Yayoi,Bunkyo-ku, Tokyo 113-0032, Japan |
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| 基金项目： | supported by Science and Technology Development Fund of Gansu Earthquake Administration of Gansu Province (No. 2012M02);National Natural Science Foundation of China (No. 41274093) |
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| 摘 要： | The D＇＇ layer,which is located atop the core–mantle boundary,has long been an area of focus for global seismology studies. A widely used approach to study the discontinuities in the D＇＇ layer involves the use of the SdS phases between the S and ScS phases,which requires that certain stringent conditions be satisfied with respect to an epicentral distance and earthquake depth. Therefore,this approach is only practical for investigating the presence and topography of velocity interfaces in certain local regions around the world. The Russia–Kazakhstan border region has been a ‘‘blind spot＇＇ with respect to this detection method. The seismic network deployed in the northeastern margin of the Tibetan Plateau has recorded relatively clear SdS phases for the MS6.3 earthquake that occurred in Spain on April 11,2010,allowing this blind spot to be studied. This paper compares the observed waveforms and synthetics and uses the travel times of the relevant phases to obtain a D＇＇ discontinuity depth between2,610 and 2,740 km in the examined area. This study provides the first results regarding the depth of the D＇＇ layer discontinuity for this region and represents an important addition to the global studies of the D＇＇ layer.
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| 关 键 词： | 地震波形数据 不连续性 边境地区 俄罗斯 西班牙 深源地震 地形 青藏高原东北缘 |
An examination of the presence and topography of the D＇＇ discontinuity under the Russia–Kazakhstan border region using seismic waveform data from a deep earthquake in Spain |
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| Xuzhang Shen,;Yuanze Zhou,;Koki Idehara,;Xiuping Mei,;Kangsheng Xu.An examination of the presence and topography of the D＇＇ discontinuity under the Russia–Kazakhstan border region using seismic waveform data from a deep earthquake in Spain[J].Acta Seismologica Sinica(English Edition),2014(2):209-215. |
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| Authors: | Xuzhang Shen Yuanze Zhou Koki Idehara Xiuping Mei Kangsheng Xu |
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| Abstract: | D＇＇ Russia-Kazakhstan border Spain deep earthquake North eastern margin of Tibet |
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| Keywords: | D' Russia-Kazakhstan border Spain deep earthquake North eastern margin of Tibet |
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