Ionospheric Anomalies Observed by GPS TEC Prior to the Qinghai-Tibet Region Earthquakes
文献类型：期刊论文
| 作者 | Xia, Chunliang1; Yang, Shaomin1,2; Xu, Guirong3; Zhao, Biqiang4; Yu, Tao5 |
| 刊名 | TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES
 |
| 出版日期 | 2011-04-01 |
| 卷号 | 22期号:2页码:177-185 |
| 关键词 | Earthquake Ionosphere GPS TEC Anomaly |
| ISSN号 | 1017-0839 |
| DOI | 10.3319/TAO.2010.08.13.01(TibXS) |
| 文献子类 | Article |
| 英文摘要 | The precursory processes detected from unambiguous and repeatable instrumental observations that precede an earthquake remain elusive despite the multiple types of pre-earthquake signals gained from observations of geo-electricity, geo-magnetism, and electromagnetism. Recently, much attention has been paid to associate abnormal behaviors of TEC (total electron content) in ionosphere, with seismic forcing: In this paper, we examined ionospheric TEC variations 1 - 2 weeks preceding 20 moderate to great earthquakes (M = 5 - 8) in the Tibetan Plateau and its neighboring regions between 1999 to 2008, with the help of a nationwide continuously-tracking GPS network. The temporal and spatial TEC variations over the specific seismogenic zones were calculated, and the causal linkage between the identified TEC anomalies and these earthquakes was examined. We find that most of the earthquakes showed significant abnormalities with similar characteristics. The anomalies, either upper anomalies (85%, 17/20) or lower anomalies (65%, 13/20) occurred in the ionosphere with dimensions of 30 in latitude and 30 in longitude above the epicenters. It is noted that the ionospheric anomalies were more dependent on focal depths of earthquakes than their magnitudes. Our results suggest that these anomalies of TEC may be possible seismo-ionospheric signatures for the earthquakes in Tibet and its margins. |
| WOS关键词 | TOTAL ELECTRON-CONTENT ; CHI-CHI ; PRECURSORS ; PERTURBATIONS |
| WOS研究方向 | Geology ; Meteorology & Atmospheric Sciences ; Oceanography |
| 语种 | 英语 |
| WOS记录号 | WOS:000289592200009 |
| 出版者 | CHINESE GEOSCIENCE UNION |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/74632]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Xia, Chunliang |
| 作者单位 | 1.China Univ Geosci, Inst Geophys & Geomat, Wuhan 430074, Peoples R China 2.China Earthquake Adm, Inst Seismol, Wuhan, Peoples R China 3.China Meteorol Adm, Inst Heavy Rain, Wuhan, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, Beijing Natl Observ Space Environm, Beijing, Peoples R China 5.China Meteorol Adm, Natl Ctr Space Weather, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xia, Chunliang,Yang, Shaomin,Xu, Guirong,et al. Ionospheric Anomalies Observed by GPS TEC Prior to the Qinghai-Tibet Region Earthquakes[J]. TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES,2011,22(2):177-185. |
| APA | Xia, Chunliang,Yang, Shaomin,Xu, Guirong,Zhao, Biqiang,&Yu, Tao.(2011).Ionospheric Anomalies Observed by GPS TEC Prior to the Qinghai-Tibet Region Earthquakes.TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES,22(2),177-185. |
| MLA | Xia, Chunliang,et al."Ionospheric Anomalies Observed by GPS TEC Prior to the Qinghai-Tibet Region Earthquakes".TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES 22.2(2011):177-185. |
入库方式： OAI收割
来源：地质与地球物理研究所
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