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| 1 | Crustal structure of the northeastern Tibetan plateau,the Ordos block and the Sichuan basin from ambient noise tomography显示文摘We apply ambient noise tomography to significant seismic data resources in a region including the northeastern Tibetan plateau,the Ordos block and the Sichuan basin.The seismic data come from about 160 stations of the provincial broadband digital seismograph networks of China.Ambient noise cross-correlations are performed on the data recorded between 2007 and 2009 and high quality inter-station Rayleigh phase velocity dispersion curves are obtained between periods of 6 s to 35 s.Resulting Rayleigh wave phase velocity maps possess a lateral resolution between 100 km and 200 km.The phase velocities at short periods (<20 s) are lower in the Sichuan basin,the northwest segment of the Ordos block and the Weihe graben,and outline sedimentary deposits.At intermediate and long periods (>25 s),strong high velocity anomalies are observed within the Ordos block and the Sichuan basin and low phase velocities are imaged in the northeastern Tibetan plateau,reflecting the variation of crustal thickness from the Tibetan plateau to the neighboring regions in the east.Crustal and uppermost mantle shear wave velocities vary strongly between the Tibetan plateau,the Sichuan basin and the Ordos block.The Ordos block and the Sichuan basin are dominated by high shear wave velocities in the crust and uppermost mantle.There is a triangle-shaped low velocity zone located in the northeastern Tibetan plateau,whose width narrows towards the eastern margin of the plateau.No low velocity zone is apparent beneath the Qinling orogen,suggesting that mass may not be able to flow eastward through the boundary between the Ordos block and the Sichuan basin in the crust and uppermost mantle. | Yong Zheng Yingjie Yang Michael H. Ritzwoller Xiufen Zheng Xiong Xiong Zuning Li | 2010 | Earthquake Science2010，23，5： | 43 |
| 2 | Three dimensional shear wave velocity structure of the crust and upper mantle beneath China from ambient noise surface wave tomography显示文摘We determine the three-dimensional shear wave velocity structure of the crust and upper mantle in China using Green's functions obtained from seismic ambient noise cross-correlation.The data we use are from the China National Seismic Network,global and regional networks and PASSCAL stations in the region.We first acquire cross-correlation seismograms between all possible station pairs.We then measure the Rayleigh wave group and phase dispersion curves using a frequency-time analysis method from 8 s to 60 s.After that,Rayleigh wave group and phase velocity dispersion maps on 1° by 1° spatial grids are obtained at different periods.Finally,we invert these maps for the 3-D shear wave velocity structure of the crust and upper mantle beneath China at each grid node.The inversion results show large-scale structures that correlate well with surface geology.Near the surface,velocities in major basins are anomalously slow,consistent with the thick sediments.East-west contrasts are striking in Moho depth.There is also a fast mid-to-lower crust and mantle lithosphere beneath the major basins surrounding the Tibetan plateau (TP) and Tianshan (Junggar,Tarim,Ordos,and Sichuan).These strong blocks,therefore,appear to play an important role in confining the deformation of the TP and constraining its geometry to form its current triangular shape.In northwest TP in Qiangtang,slow anomalies extend from the crust to the mantle lithosphere.Meanwhile,widespread,a prominent low-velocity zone is observed in the middle crust beneath most of the central,eastern and southeastern Tibetan plateau,consistent with a weak (and perhaps mobile) middle crust. | Xinlei Sun Xiaodong Song Sihua Zheng Yingjie Yang Michael H. Ritzwoller | 2010 | Earthquake Science2010，23，5： | 28 |
| 3 | 利用背景噪声进行地震成像显示文摘利用长时序列背景地震噪声进行地震成像是最近的一项创新成果,它摆脱了传统方法须依赖地震获取地壳上地幔高分辨率信息的限制。新方法被称为背景噪声层析成像(ANT),主要用于地震面波。随着背景噪声层析成像技术在最新部署的地震台阵(如美国台阵地球透镜项目)资料解释中的应用,更高分辨率的地壳上地幔地震模型已赫然显现。 | Michael H. Ritzwoller 左玉玲(译) 郑需要(校) | 2009 | 国际地震动态2009，，9： | 5 |
| 4 | Surface wave tomography on a large-scale seismic array combining ambient noise and teleseismic earthquake data显示文摘We discuss two array-based tomography methods,ambient noise tomography (ANT) and two-planewave earthquake tomography (TPWT),which are capable of taking advantage of emerging large-scale broadband seismic arrays to generate high resolution phase velocity maps,but in complementary period band:ANT at 8-40 s and TPWT at 25-100 s period.Combining these two methods generates surface wave dispersion maps from 8 to 100 s periods,which can be used to construct a 3D v S model from the surface to ~200 km depth.As an illustration,we apply the two methods to the USArray/Transportable Array.We process seismic noise data from over 1 500 stations obtained from 2005 through 2009 to produce Rayleigh wave phase velocity maps from 8 to 40 s period,and also perform TPWT using ~450 teleseismic earthquakes to obtain phase velocity maps between 25 and 100 s period.Combining dispersion maps from ANT and TPWT,we construct a 3D vS model from the surface to a depth of 160 km in the western and central USA.These surface wave tomography methods can also be applied to other rapidly growing seismic networks such as those in China. | Yingjie Yang Weisen Shen Michael H. Ritzwoller | 2011 | Earthquake Science2011，24，1： | 3 |
| 5 | Study of surface nuclear magnetic resonance inverse problems显示文摘 | Peter B Weichman Dong Rong Lun Michael H Ritzwoller | 2002 | Journal of Applied Geophysics2002，50，12： | 1 |
| 6 | Processing seismic ambient noise data to obtain reliable broad-band surface wave dispersion measurements显示文摘 | Bensen G D Ritzwoller M H Barmin M P at el | 2007 | Geophys J Int2007，169，： | 1 |
| 7 | Eurasian Surface Wave Tomography: Group Velocities 显示文摘 | Ritzwoller M H Levshin A L | 1998 | Journal of Geophysical Research1998，103，3： | 1 |
| 8 | Estimating shallow shear velocities with marine multicomponent seismic data显示文摘 | Ritzwoller M H Levshin A I | | 0，，06： | 1 |
| 9 | Outpatient use of low molecular weight heparin monotherapy for first-line treatment of venous thromboembolism in advanced cancer显示文摘 | Delate T Witt DM Ritzwoller D | 2012 | Oncologist2012，17，3： | 1 |
| 10 | Surface nuclear magnetic resonance imaging of large systems显示文摘 | WEICHMAN P B LAVELY E M RITZWOLLER M H | 1999 | Phys Rev Lett1999，82，： | 1 |
| 11 | Processing seismic ambient noise data to obtain relia- ble broad-band surface wave dispersion measurements 显示文摘 | BENSEN G D RITZWOLLER M H BARMIN M P | 2007 | Geophysical Journal International2007，169，： | 1 |
| 12 | Structure of the crust and uppermost mantle beneath the western United States revealed by ambient noise and earthquake tomography显示文摘 | Yang Y Ritzwoller M H Lin F C | 2008 | J Geophys Res2008，113，12： | 1 |
| 13 | Processing seismic ambient noise data to obtain reliable broad-band surfacewave dispersion measurements显示文摘 | Bensen G D Ritzwoller M H Barmin M P | 2007 | Geophys J Int2007，169，12： | 1 |
| 14 | A study of surface nuclear magnetic resonance inverse problems显示文摘 | Weichman P B Dong Rong Lun Ritzwoller M H | 2002 | Journal of Applied Geophysics2002，50，2： | 1 |
| 15 | Ambient noise Rayleigh wave tomography across Europe显示文摘 | Yang Y Ritzwoller M H Levshin A | 2007 | Geophys J Int2007，168，： | 1 |
| 16 | Surface wave tomography of the western United States from ambient seismic noise: Rayleigh and Love wave phase velocity maps显示文摘 | Lin F C Moschetti M P Ritzwoller M H | 2008 | Geophys J Int2008，173，： | 1 |
| 17 | Processing seismic ambient noise data to obtain reliable broad-band surface wave dispersion measurements显示文摘 | Bensen G D Ritzwoller M H Barmin M P | 2007 | Geophysical Journal International2007，169，3： | 1 |
| 18 | Ambient noise Rayleigh wave tomography across Europe显示文摘 | Yang Y Ritzwoller M H Levshin A L | 2007 | Geophysical Journal International2007，168，1： | 1 |
| 19 | Subsurface characterization of the COSO Geothermal Field and surroundings by Ambient Noise Tomography显示文摘 | Yang Y Ritzwoller M H Jones C H | 2010 | Geochemistry Geophysics and Geosystems2010，2010，： | 1 |
| 20 | Ambient noise Rayleigh wave tomography across Europe 显示文摘 | Yang Y Ritzwoller M H Levshin A L | 2007 | Geophys J Int2007，168，1： | 1 |
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