当前位置: X-MOL 学术Phys. Earth Planet. Inter. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Changes in shear-wave splitting at the 2014 Bárðarbunga seismic crisis and dyke intrusion in Iceland compared with earthquakes and other eruptions
Physics of the Earth and Planetary Interiors ( IF 2.3 ) Pub Date : 2020-03-01 , DOI: 10.1016/j.pepi.2020.106446
Qiyu Hong , Stuart Crampin , Yuan Gao

Abstract We use shear-wave splitting (SWS) above small earthquakes to monitor stress-variations before the 2014 Barðarbunga seismic crisis and dyke intrusion in central Iceland. SWS is sensitive to stress-induced variations in the internal geometry of the distributions of stress-aligned fluid-saturated microcracks pervading almost all crustal rocks. This allows stress-accumulation before both impending earthquakes and impending volcanic eruptions to be monitored and potentially the events stress-forecast. We compare the behaviour of SWS before Barðarbunga with the behaviour before large earthquakes and other volcanic episodes where SWS has been monitored. On the basis of the duration of stress-changes, we classify volcanic episodes into three broad classes. During analysis of SWS before Barðarbunga, temporal variation in polarizations and another retrospective stress-forecast earthquake were recognized.

中文翻译:

与地震和其他火山爆发相比,冰岛 2014 年 Bárðarbunga 地震危机和堤坝侵入时横波分裂的变化

摘要 我们在 2014 年 Barðarbunga 地震危机和冰岛中部岩脉侵入之前,使用小地震上方的剪切波分裂 (SWS) 来监测应力变化。SWS 对应力引起的内部几何结构的变化很敏感,其中应力对齐的流体饱和微裂缝几乎遍布所有地壳岩石的分布。这允许在即将发生的地震和即将发生的火山爆发之前进行压力累积,并可能对事件进行压力预测。我们将 Barðarbunga 之前的 SWS 行为与大地震和其他已监测 SWS 的火山事件之前的行为进行了比较。根据压力变化的持续时间,我们将火山事件分为三大类。在 Barðarbunga 之前对 SWS 进行分析时,
更新日期:2020-03-01
down
wechat
bug