...R. D. List abstract A method of obtaining the displacement field of the Haskell model of an earthquake source, based on the well-known equivalence of seismic dislocations and body force, is described. It is shown that the solution of Madariaga (1978) can be generalized and that the two methods...

...Raúl Madariaga abstract We study the near-field generated by Haskell's rectangular fault model used extensively to interpret seismic data. By means of the Cagniard-de Hoop method we have been able to find an exact solution for the near-field particle velocities in the case of a step-function source...

... by Haskell (1967) and one by Mueller and Murphy (1971a), are compared with each other and they agree well for frequencies around 1 Hz and for yields in the range 3 to 300 kt. The Haskell model for tuff is modified to be more compatible with the models for salt, granite and alluvium. The Haskell model...

... for an elastic layer having velocities and density varying linearly with depth were computed by integrating numerically the governing differential systems and compared with results based on the Haskell model of splitting the linear layer in homogeneous sublayers. Even an adaptive process with a variable step...

... models, that is, the classical Haskell’s model ( HM ) and the modified HM with radial rupture propagation ( HM‐RRP ). The DSM accounts for directivity effects in the fault‐parallel direction, as well as fault‐normal ground motions, and overcomes the unrealistic uniform slip and stress singularities...

...) to forward‐model the rupture directions of the target events assuming the 1D Haskell model. The typical notion is that rupture tends to propagate away from the injection site where fluid pressure is the highest. Our analysis of four target earthquakes indicates various rupture styles with respect...

... be satisfactorily explained by a half-space model, because calculations based on such a model require a larger value of the P -wave velocity for the shorter period waves. However, calculations based upon Haskell's model of a crustal layer over a half-space give a satisfactory fit to the observed data. 15 7...

... and compared with the predictions of the Haskell, Mueller-Murphy, and finite difference numerical models. Several recent studies of high-frequency, near-field signals and teleseismic short-period P waves for LONGSHOT, MILROW, and CANNIKIN constrain the source functions at periods of 0.5 to 2.0 sec. Teleseismic...

... polarity. These models are shown to simulate well the principal features of common circular and Haskell type of models, including the corner frequency shift of P waves with respect to S waves, and the relation between rupture velocity and maximum seismic efficiency. Spectral bandwidths...

... in a Haskell type fault model to derive scaling laws relating seismic moment to M S (20-sec surface-wave magnitude), M S to S and m b (1-sec body-wave magnitude) to M S . Observed data agree well with the predicted scaling relation. The “source spectrum” depends on both azimuth and apparent velocity...

... to a unilateral rupture Haskell fault model, and the synthetic seismograms of different models calculated by the higher-degree moment tensors are compared with the theoretical solutions for a propagating source. Our results show that, the representation of higher- degree moment tensors up to degree 2 can describe...

...Figure 2. Computational time versus number of layers in models for Love waves. Circles represent computational time taken by the fast-generalized RT method, crosses by the Thomson–Haskell method, and triangles by the modified Thomson–Haskell method. Obviously, the modified Thomson–Haskell...

...-of-precision con- trol feature and is about 38 per cent faster than the reducedmatrix extension; in fact, it is about 12 per cent faster than the fastest of the Thomson-Haskell versions. Explicit forms of the new representation are given for the layered-half-space analogs of continental and oceanic models...