Determination of earthquake source parameters from waveform data for studies of global and regional seismicity

  title={Determination of earthquake source parameters from waveform data for studies of global and regional seismicity},
  author={Adam M. Dziewoński and T.-A. Chou and John H. Woodhouse},
  journal={Journal of Geophysical Research},
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 stress glut density) at a given frequency. Thus two classical problems of seismology are combined into a single procedure. Given an estimate of the origin time, epicentral coordinates and depth, an initial moment tensor is derived using one of the variations of the method described in detail by Gilbert… 
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
Regional Centroid-Moment-Tensor Analysis for Earthquakes in Canada and Adjacent Regions: An Update
Reliable determination of earthquake source parameters is a subject of fundamental importance for seismological research. It also provides critical observational constraints to the study of
Estimation of earthquake source parameters by the inversion of waveform data: Global seismicity, 1981-1983
Abstract A waveform inversion algorithm, based on optimal filter theory, has been applied to the P waves from 260 of the largest earthquakes occurring during the years 1981 through 1983. Estimates of
Focal mechanisms of moderate-size earthquakes from the analysis of single-station three-component surface-wave records
Abstract The method proposed a few years ago by Ekstrom et al. (1986) to retrieve the focal-mechanism parameters from a set of Love and Rayleigh waves recorded on a single station is extended to
A systematic study of source time functions and moment tensors of intermediate and deep earthquakes
[1] We developed an inversion algorithm to determine the Source Time Function and Moment Tensor of intermediate and deep earthquakes from a set of teleseismic body wave records. The method proceeds
Source Parameters of Weak Crustal Earthquakes of the Vrancea Region from Short-period Waveform Inversion
High-frequency records of nine low magnitude shallow earthquakes of the Vrancea (Romania) seismic region are inverted for the seismic moment tensor (MT). An approach is suggested regarding how to
Moment tensor inversion for near earthquakes using long-period digital seismograms.
The possibility of rapid determination of source parameters (seismic moment and fault parameters) for near earthquakes is examined by means of the moment tensor inversion method. Numerical


Estimation of the seismic moment tensor from teleseismic body wave data with applications to intraplate and mantle earthquakes
Amplitude data from direct and near-source reflected phases are inverted to obtain point-source moment tensors. The inversion scheme is computationally efficient, and the results can be interpreted
An application of normal mode theory to the retrieval of structural parameters and source mechanisms from seismic spectra
  • F. Gilbert, A. Dziewoński
  • Geology
    Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences
  • 1975
A cyclic process of refining models of the mechanical structure of the Earth and models of the mechanism of one or more earthquakes is developed. The theory of the elastic-gravitational free
Focal depths and moment tensor representations of shallow earthquakes associated with the Great Sumba Earthquake
Focal depths in the range 8 to 24 km below the seafloor were determined for seven of the larger shocks associated with the Great Sumba earthquake of August 19, 1977. Depth control was achieved by
A technique for the recovery of the seismic moment tensor applied to the Oaxaca, Mexico earthquake of November 1978
abstract The potential for using seismograms in a linear inversion process to recover the seismic moment tensor has been theorized for sometime. Unfortunately, practical application of the theory is
Synthesis ofzce Studies–Kurile Islands Earthquake of October 13, 1963
Normal mode solutions for a spherical earth model are superposed to obtain realistic synthetic surface waves for various force systems. The calculation of excitation functions is greatly facilitated
Reference point equalization method for determining the source and path effects of surface waves
A reference point equalization method is presented for the determination of source and propagation effects of surface waves. The method works on seismic events located in a small source region,
Scaling law of seismic spectrum
The dependence of the amplitude spectrum of seismic waves on source size is investigated on the basis of two dislocation models of an earthquake source. One of the models (by N. Haskell) is called
The determination of source properties by the linear inversion of seismograms
A method has been developed allowing the direct inversion of seismograms to obtain an estimate of the seismic source, as characterized by its equivalent force moment tensor. With reasonable
The Alaska Earthquake of 1964: Radiation of long-period surface waves and source mechanism
The records of multiple Love and Rayleigh waves of the Alaska earthquake of 1964 were recovered from the 30–100 seismograph records at the WWSSN stations. The seismograms were equalized to a
Mechanism of earthquakes and nature of faulting on the mid‐oceanic ridges
The mechanisms of 17 earthquakes on the mid-oceanic ridges and their continental extensions were investigated using data from the World-Wide Standardized Seismograph Network of the U. S. Coast and