期刊
GEOPHYSICAL RESEARCH LETTERS
卷 43, 期 5, 页码 1918-1927出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2016GL067773
关键词
postseismic deformation; glacial isostatic adjustment; GPS; DORIS; viscoelastic deformation
资金
- Australian Research Council [FT110100207]
- Special Research Initiative for Antarctic Gateway Partnership [SR140300001]
- FP7 Marie Curie International Outgoing Fellowship [330103]
- Australian Research Council [FT110100207] Funding Source: Australian Research Council
Antarctica's secular motion is thought to be almost everywhere governed by horizontal rigid plate rotation plus three-dimensional deformations due to past and present changes in ice ocean loading, known as glacial isostatic adjustment (GIA). We use geodetic data to investigate deformation following the 1998 M similar to 8.2 Antarctic intraplate Earthquake and show sustained three-dimensional deformation along East Antarctica's coastline, 600km from the rupture location. Using a model of viscoelastic deformation, we are able to match observed northward velocity changes, and either east or height, but not all three directions simultaneously, apparently partly due to lateral variations in mantle rheology. Our modeling predicts that much of Antarctica may still be deforming, with further deformation possible from the 2004 M 8 Macquarie Ridge Earthquake. This previously unconsidered mode of Antarctic deformation affects geodetic estimates of plate motion and GIA; its viscous nature raises the prospect of further present-day deformation due to earlier Great Earthquakes.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据