| DOI: | 10.1002/2014GL059712
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| 论文题名: | Universality of slow earthquakes in the very low frequency band |
| 作者: | Ide S.; Yabe S.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-10132
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| EISSN: | 1944-9863
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| 出版年: | 2014
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| 卷: | 41, 期:8 | | 起始页码: | 2786
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| 结束页码: | 2793
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| 语种: | 英语
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| 英文关键词: | Nankai
; scaled energy
; slow earthquake
; tectonic tremor
; very low frequency
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| Scopus关键词: | Frequency bands
; Spatial distribution
; Tectonics
; Tensors
; Broadband seismograms
; Frequency-dependent characteristics
; Nankai
; Plate interfaces
; scaled energy
; Spatial variations
; Tectonic tremors
; Very low frequency
; Earthquakes
; deformation
; earthquake magnitude
; moment tensor
; plate motion
; seismogram
; subduction zone
; tectonics
; Japan
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| 英文摘要: | Deep tectonic tremors have been observed together with signals in the very low frequency (VLF) band from 0.02 to 0.05Hz, which have been identified as VLF events in limited regions of subduction zones. By stacking broadband seismograms relative to the timing of tremors, we have detected similar signals in all regions where tremors occur in western Japan. These signals are inverted to obtain the moment tensor, and the fault-normal and slip vectors are generally consistent with the geometry of the plate interface and the direction of plate motion. Therefore, these signals are probably radiated by shear slip on the plate interface. The ratio between the seismic energy rate estimated from the tremors and seismic moment rate in the VLF band is almost proportional, with a proportionality constant (i.e., scaled energy) of around 10-11. The spatial distribution of scaled energy may reflect spatial variations in the frequency-dependent characteristics of slow deformation. Key Points Detection of hidden signals in the VLF band by stacking broadband tremor signals Spatial distribution of moment tensor for all tremor regions in western Japan Proportionality between tremor energy and VLF seismic moment ©2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84899036483&doi=10.1002%2f2014GL059712&partnerID=40&md5=88301b4d59b9034aa92e17f0789b0b34
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/7396
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Department of Earth and Planetary Science, University of Tokyo, Tokyo, Japan
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| Recommended Citation: | |
Ide S.,Yabe S.. Universality of slow earthquakes in the very low frequency band[J]. Geophysical Research Letters,2014-01-01,41(8).
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