DOI: 10.1002/2016GL068437
论文题名: Constraining the source location of the 30 May 2015 (Mw 7.9) Bonin deep-focus earthquake using seismogram envelopes of high-frequency P waveforms: Occurrence of deep-focus earthquake at the bottom of a subducting slab
作者: Takemura S. ; Maeda T. ; Furumura T. ; Obara K.
刊名: Geophysical Research Letters
ISSN: 0094-9006
EISSN: 1944-8737
出版年: 2016
卷: 43, 期: 9 起始页码: 4297
结束页码: 4302
语种: 英语
英文关键词: Izu-Bonin-Mariana arc
; Pacific slab
; seismic wave propagation
; seismic wave scattering
; source location
; subduction zone
Scopus关键词: Crack propagation
; Finite difference method
; Geophysics
; Location
; Seismic waves
; Seismology
; Tectonics
; Wave propagation
; Mariana arc
; Pacific slab
; Source location
; Subduction zones
; Wave scattering
; Earthquakes
英文摘要: In this study, the source location of the 30 May 2015 (Mw 7.9) deep-focus Bonin earthquake was constrained using P wave seismograms recorded across Japan. We focus on propagation characteristics of high-frequency P wave. Deep-focus intraslab earthquakes typically show spindle-shaped seismogram envelopes with peak delays of several seconds and subsequent long-duration coda waves; however, both the main shock and aftershock of the 2015 Bonin event exhibited pulse-like P wave propagations with high apparent velocities (~12.2 km/s). Such P wave propagation features were reproduced by finite-difference method simulations of seismic wave propagation in the case of slab-bottom source. The pulse-like P wave seismogram envelopes observed from the 2015 Bonin earthquake show that its source was located at the bottom of the Pacific slab at a depth of ~680 km, rather than within its middle or upper regions. © 2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84966295020&doi=10.1002%2f2016GL068437&partnerID=40&md5=15c18779bcdbdb9dbdeefd2d5db0f235
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9969
Appears in Collections: 科学计划与规划 气候变化与战略
There are no files associated with this item.
作者单位: Earthquake Research Institute, University of Tokyo, Tokyo, Japan
Recommended Citation:
Takemura S.,Maeda T.,Furumura T.,et al. Constraining the source location of the 30 May 2015 (Mw 7.9) Bonin deep-focus earthquake using seismogram envelopes of high-frequency P waveforms: Occurrence of deep-focus earthquake at the bottom of a subducting slab[J]. Geophysical Research Letters,2016-01-01,43(9).