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Determination of earthquake source parameters from waveform data for studies of global and regional seismicity
- A. Dziewoński, T.-A. Chou, J. Woodhouse
- Geology
- 10 April 1981
It is possible to use the waveform data not only to derive the source mechanism of an earthquake but also to establish the hypocentral coordinates of the ‘best point source’ (the centroid of the…
S40RTS: A degree-40 shear-velocity model for the mantle from new Rayleigh wave dispersion, teleseismic traveltime and normal-mode splitting function measurements
- J. Ritsema, A. Deuss, H. V. Heijst, J. Woodhouse
- Geology
- 1 March 2011
We have developed model S40RTS of shear-velocity variation in Earth's mantle using a new collection of Rayleigh wave phase velocity, teleseismic body-wave traveltime and normal-mode splitting…
Global transition zone tomography
- J. Ritsema, H. V. Heijst, J. Woodhouse
- Geology
- 1 February 2004
[1] Our understanding of large-scale mantle dynamics depends on accurate models of seismic velocity variation in the upper mantle transition zone (400–1000 km depth). With the Mode Branch Stripping…
Mapping the upper mantle: Three‐dimensional modeling of earth structure by inversion of seismic waveforms
- J. Woodhouse, A. Dziewoński
- Geology
- 10 July 1984
A method is presented for the inversion of waveform data for the three-dimensional distribution of seismic wave velocities. The method is applied to data from the global digital networks…
Surface Waves in a Laterally Varying Layered Structure
- J. Woodhouse
- Geology
- 1 June 1974
Sum17zur.y A kind of ray theory is developed for surface waves in a layered elastic medium in which there are gradual lateral variations in the thicknesses of the layers and in the elastic parameters…
CENTROID-MOMENT TENSOR SOLUTIONS FOR 201 MODERATE AND LARGE EARTHQUAKES OF 1981
- A. Dziewoński, J. Woodhouse
- Geology
- 10 April 1983
Data from the Global Digital Seismograph Network were used to obtain ‘centroid-moment tensor’ solutions using the method of Dziewonski et al. (1981). Results were obtained for 201 earthquakes ranging…
A systematic search for mantle discontinuities using SS‐precursors
- A. Deuss, J. Woodhouse
- Geology
- 1 April 2002
We perform a systematic search for reflectors in the upper and lower mantle using SS‐precursors. The largest number of robust reflections comes from a depth of 220 km, which we associate with the…
Anisotropy of the inner core inferred from PKIKP travel times
- A. Morelli, A. Dziewoński, J. Woodhouse
- Geology
- 1 December 1986
Travel-time residuals of the PKIKP phase observed between 170° and 180° show an axisymmetric pattern of degree 2 with an amplitude of about 2 seconds. The effect at shorter distances is much less…
Evidence for inner core anisotropy from free oscillations
- J. Woodhouse, D. Giardini, Xiang-Dong Li
- Geology
- 1 December 1986
Previous hypotheses concerning the cause of anomalous splitting in free oscillation spectra have led to models which are difficult to accept from the physical point of view - involving either…
Ratio of relative S to P velocity heterogeneity in the lower mantle
- G. S. Robertson, J. Woodhouse
- Geology
- 10 September 1996
The parameter v = ∂lnνs/∂lnνp, the ratio of relative S to P velocity heterogeneity, can be measured seismically and is important in determining the mineral physics of the deep mantle. However,…
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