DOI: 10.1038/ngeo2490
论文题名: The frictional, hydrologic, metamorphic and thermal habitat of shallow slow earthquakes
作者: Saffer D.M. ; Wallace L.M.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2015
卷: 8, 期: 8 起始页码: 594
结束页码: 600
语种: 英语
Scopus关键词: earthquake epicenter
; earthquake trigger
; friction
; geophysical survey
; heterogeneity
; hydrological change
; instrumentation
; metamorphism
; numerical model
; seafloor
; seismology
; subduction zone
; temperature effect
; thrust fault
; trench
; tsunami
英文摘要: The recognition of a previously unknown spectrum of slow earthquake phenomena has ignited one of the most dynamic fields in modern seismology and fault mechanics. These slow events can last for a few seconds to years and occur in a wide range of settings. They are most extensively studied on the deep portion of the plate interface in subduction zones, where they are typically detected by land-based instrument networks. Recent investigations reveal that similar events are also common along the shallow, more accessible reaches of subduction zone megathrust faults, near the trench. These shallow slow earthquakes may be linked to tsunamigenesis and the triggering of large interplate earthquakes. Geophysical surveys, drilling, numerical modelling and laboratory studies focused on this near-trench region collectively show that shallow slow earthquake phenomena occur in regions of highly overpressured fluid and low effective stress, and within fault rocks characterized by transitional frictional behaviour. However, slow earthquakes are not restricted to specific temperature regimes or depths. They are also linked with the subduction of rough seafloor, where the plate interface is likely to be compositionally and geometrically heterogeneous. The physical conditions conducive to slow earthquakes are thought to be met on many shallow megathrust faults. We therefore expect that shallow slow slip occurs at many, if not most, subduction zones. © 2015 Macmillan Publishers Limited. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106287
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: Department of Geosciences, Center for Geomechanics, Geofluids, and Geohazards, Pennsylvania State University, University Park, PA, United States; Institute for Geophysics, University of Texas at Austin, 10100 Burnet Road, Austin, TX, United States
Recommended Citation:
Saffer D.M.,Wallace L.M.. The frictional, hydrologic, metamorphic and thermal habitat of shallow slow earthquakes[J]. Nature Geoscience,2015-01-01,8(8)