globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo2212
论文题名:
Antarctic icequakes triggered by the 2010 Maule earthquake in Chile
作者: Peng Z.; Walter J.I.; Aster R.C.; Nyblade A.; Wiens D.A.; Anandakrishnan S.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2014
卷: 7, 期:9
起始页码: 677
结束页码: 681
语种: 英语
英文摘要: Seismic waves from distant, large earthquakes can almost instantaneously trigger shallow micro-earthquakes and deep tectonic tremor as they pass through Earth's crust. Such remotely triggered seismic activity mostly occurs in tectonically active regions. Triggered seismicity is generally considered to reflect shear failure on critically stressed fault planes and is thought to be driven by dynamic stress perturbations from both Love and Rayleigh types of surface seismic wave. Here we analyse seismic data from Antarctica in the six hours leading up to and following the 2010 M w 8.8 Maule earthquake in Chile. We identify many high-frequency seismic signals during the passage of the Rayleigh waves generated by the Maule earthquake, and interpret them as small icequakes triggered by the Rayleigh waves. The source locations of these triggered icequakes are difficult to determine owing to sparse seismic network coverage, but the triggered events generate surface waves, so are probably formed by near-surface sources. Our observations are consistent with tensile fracturing of near-surface ice or other brittle fracture events caused by changes in volumetric strain as the high-amplitude Rayleigh waves passed through. We conclude that cryospheric systems can be sensitive to large distant earthquakes. © 2014 Macmillan Publishers Limited. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106582
Appears in Collections:气候减缓与适应
科学计划与规划

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作者单位: School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA 30332, United States; Geosciences Department, Colorado State University, Fort Collins, CO 80523, United States; Department of Geosciences, Pennsylvania State University, University Park, PA 16802, United States; Department of Earth and Planetary Sciences, Washington University, St Louis, MO 63130, United States; Institute for Geophysics, University of Texas, Austin TX, 78758, United States

Recommended Citation:
Peng Z.,Walter J.I.,Aster R.C.,et al. Antarctic icequakes triggered by the 2010 Maule earthquake in Chile[J]. Nature Geoscience,2014-01-01,7(9)
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