Waveform detection and location of deep earthquakes in the subduction zone beneath Northeast China
文献类型：期刊论文
| 作者 | Jiang JinZhong1,2; Chen QiFu1,3,4; Li Jiao2 |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2019-08-01 |
| 卷号 | 62期号:8页码:2930-2945 |
| 关键词 | Deep earthquakes Match & Locate method Matched Filter method Double-difference location Northeast China |
| ISSN号 | 0001-5733 |
| DOI | 10.6038/cjg2019M0210 |
| 英文摘要 | Along the Japan trench, the West Pacific plate is subducting beneath the Eurasian plate, reaching about 600 km depth below near the Hunchun area, Northeast China, as evidenced by deep earthquakes (with focal depth more than 300 km) observed. These quakes are notable for producing very few aftershocks in comparison with shallow earthquakes. There are 27 earthquakes deeper than 300 km in Northeast China reported by the International Seismological Centre (ISC) from August 2010 to December 2014. However, few foreshocks or aftershocks before and after these earthquakes are documented in the ISC catalog, which is unclear that whether this is due to detection threshold by limited station distribution or different mechanisms between the deep and shallow earthquakes. In this study, we employ continuous waveform data from August 2010 to December 2014 recorded by the dense NECsaids Array (Northeast China Seismic Array to Investigate Deep Subduction) and Jilin and Heilongjiang Seismic Networks to detect the aftershock productivity of deep earthquakes by using Match & Locate (M&L) and Matched Filter methods. The well recorded waveforms for the 27 deep earthquakes in the ISC catalogue are chosen as template waveforms, meanwhile the continuous waveforms recorded by the same seismic stations are used to detect their foreshocks or aftershocks. The 27 ISC-listed deep earthquakes are self-detected successfully with maximum CC (Cross-Correlation) approximate to 1. 0. However, we don't detect any more foreshocks or aftershocks before and after the deep template earthquakes. We also relocate the deep earthquakes in Northeast China from 1966 to 2017 based on the ISC bulletin data and our phase picking data, and almost all the double-difference relocated deep earthquakes occurred within the Metastable Olivine Wedge (MOW). The about 5 km depth difference within nearby hypocenters and about 0. 5 b-value for the deep earthquakes in Northeast China may indicate that these deep events are directly related to the subducting Pacific slab. |
| WOS关键词 | HIGH-PRECISION LOCATION ; DOUBLE SEISMIC ZONE ; W 8.3 SEA ; FOCUS EARTHQUAKE ; INTRAPLATE VOLCANISM ; OKHOTSK EARTHQUAKE ; RUPTURE COMPLEXITY ; FOCAL MECHANISM ; PACIFIC SLAB ; AFTERSHOCKS |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000480300600012 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/93363]  |
| 专题 | 地质与地球物理研究所_中国科学院地球与行星物理重点实验室 |
| 通讯作者 | Chen QiFu |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China 2.Yunnan Earthquake Agcy, Kunming 650224, Yunnan, Peoples R China 3.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China 4.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jiang JinZhong,Chen QiFu,Li Jiao. Waveform detection and location of deep earthquakes in the subduction zone beneath Northeast China[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2019,62(8):2930-2945. |
| APA | Jiang JinZhong,Chen QiFu,&Li Jiao.(2019).Waveform detection and location of deep earthquakes in the subduction zone beneath Northeast China.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,62(8),2930-2945. |
| MLA | Jiang JinZhong,et al."Waveform detection and location of deep earthquakes in the subduction zone beneath Northeast China".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 62.8(2019):2930-2945. |
入库方式： OAI收割
来源：地质与地球物理研究所
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