Remote sensing anomalies of multiple geospheres before the Wenchuan earthquake and its spatiotemporal correlations

被引:0
|
作者
He M. [1 ]
Wu L. [1 ]
Cui J. [2 ]
Wang W. [1 ]
Qi Y. [1 ]
Mao W. [3 ]
Miao Z. [1 ]
Chen B. [1 ]
Shen X. [1 ,2 ]
机构
[1] School of Geosciences and Info-physics, Central South University, Changsha
[2] The Institute of Crustal Dynamics, China Earthquake Administration, Beijing
[3] School of Resource and Civil Engineering, Northeastern University, Shenyang
来源
Wu, Lixin (wulx66@csu.edu.cn) | 1600年 / Science Press卷 / 24期
基金
中国国家自然科学基金;
关键词
Anomaly manifestation; Multiple geospheres; Remote sensing anomaly; Spatio-temporal correlation; Wenchuan earthquake;
D O I
10.11834/jrs.20200059
中图分类号
学科分类号
摘要
The preparation for the occurrence of an earthquake is a complicated process. This process is usually accompanied with material migration, energy release, and information exchange, which can disturb the radiation balance in the seismogenic zone. Obtaining the changing information of the coversphere, atmosphere, and ionosphere through satellite remote sensing; analyzing seismic anomalies; and identifying earthquake precursors, have become the interactive hotspots of the remote sensing and seismology fields. As a typical case where numerous anomalies precede the main shock, this study investigated the Ms 8.0 Wenchuan earthquake and its physical mechanism of the relevant seismic anomalies. On the basis of published research results, this study systematically collected and filtered the possible remote sensing anomalies of the Wenchuan earthquake under certain criteria and summarized the abnormal features of 20 remote sensing parameters related to the coversphere (five parameters), atmosphere (eight parameters), and ionosphere (seven parameters). By mapping the anomalies in a unified framework, the spatiotemporal correlations among the anomaly manifestations were analyzed, and the overall spatiotemporal characteristics of the short-term manifestations of multiple anomalies were revealed. The results of this study can be summarized as follows. (1) The manifestations of remote sensing anomalies gradually increased, enhanced, and congested before the Wenchuan earthquake, and prominent impending earthquake precursors were observed. (2) Remote sensing anomalies developed in a bottom-up manner from the coversphere and atmosphere to the ionosphere three months before the shock, which is in accordance with the Lithosphere-Coversphere-Atmosphere-Ionosphere (LCAI) coupling paradigm. (3) Strong spatial correlations were present among the seismic faults and manifestation positions of short-term-to-impending remote sensing anomalies, which congested along the Longmenshan faults and its nearby region. (4) Multiple short-term-to-impending remote sensing and strip-shaped anomalies covered the epicenter of the main shock and developed along the Longmenshan faults, respectively, thereby reflecting the local effect of the LCAI coupling in the late stage of the seismogenous process. The clustering multi-parameter remote sensing anomalies before May 12 can be regarded as Wenchuan earthquake anomalies with precursory significance. At the macroscopic scale, the seismic response driven by the deep part of the Earth can be explained using the knowledge on the multiple geosphere coupling of the entire planet system. The in-depth analysis of the individual characteristics, spatiotemporal correlations, and overall laws of the Wenchuan earthquake remote sensing anomalies during the earthquake preparation process is critical to the investigation of the physical mechanism of seismic anomalies. This retrospective research provides heuristic clues about the energy exchange process of the Wenchuan earthquake and confirms the great potential of multi-parameter earthquake precursor research. Furthermore, this study benefits the satellite monitoring and synergic analysis of strong inland earthquakes during the late stage of earthquake preparation and provides reference for earthquake prediction studies. © 2020, Science Press. All right reserved.
引用
收藏
页码:681 / 700
页数:19
相关论文
共 133 条
  • [1] Akhoondzadeh M, Chehrebargh F J, Feasibility of anomaly occurrence in aerosols time series obtained from MODIS satellite images during hazardous earthquakes, Advances in Space Research, 58, 6, pp. 890-896, (2016)
  • [2] Akhoondzadeh M, Parrot M, Saradjian M R, Electron and ion density variations before strong earthquakes (M>6.0) using DEMETER and GPS data, Natural Hazards and Earth System Science, 10, 1, pp. 7-18, (2010)
  • [3] An Z H, Du X B, Fan Y Y, Liu J, Tan D C, Chen J Y, Xie T, A study of the electric field before the Wenchuan 8.0 earthquake of 2008 using both space-based and ground-based observational data, Chinese Journal of Geophysics, 54, 11, pp. 2876-2882, (2011)
  • [4] An Z H, Tan D C, Chen J Y, Fan Y Y, Liu J, Xie T, Discussion on the analysis method of magnetic field waveform data recorded by the DEMETER satellite, South China Journal of Seismology, 31, 1, pp. 55-65, (2011)
  • [5] Chen M H, Deng Z H, Liang Q Z, Ding L W, Tao J L, Study on the association between the surface latent heat flux (SLHF) in Tengchong region with the earthquakes in Sichuan-Yunnan region, Seismology and Geology, 36, 2, pp. 422-433, (2014)
  • [6] Chen M H, Deng Z H, Ma X J, Tao J L, Wang Y, Long- and mid-term anomalous variations of atmospheric water vapor before strong earthquake, Seismology and Geology, 33, 3, pp. 549-559, (2011)
  • [7] Chen S Y, Ma J, Liu P X, Liu L Q, Hu X Y, Exploring co-seismic thermal response of Wenchuan earthquake by using land surface temperatures of Terra and Aqua satellites, Chinese Journal of Geophysics, 56, 11, pp. 3788-3799, (2013)
  • [8] Chen S Y, Ma J, Liu P X, Liu L Q, Hu X Y, Ren Y Q, Exploring the current tectonic activity with satellite remote sensing thermal information: a case of the Wenchuan earthquake, Seismology and Geology, 36, 3, pp. 775-793, (2014)
  • [9] Chen Y, Study on Earthquake-Related Anomalous Features of Infrared Remote Sensing, (2011)
  • [10] Chen Y T, On the magnitude and the fault length of the great Wenchuan earthquake, Science and Technology Review, 26, 10, pp. 26-27, (2008)