Earthquake Mechanism

1979 ◽  
pp. 169-202
Author(s):  
Markus Båth
Keyword(s):  
Earthquake Mechanism

Computer program for a fault-plane solution

1963 ◽  
Vol 53 (1) ◽  
pp. 1-13
Author(s):  
Keichi Kasahara
Keyword(s):  
Probability Function ◽  
Fault Plane ◽  
Successive Approximations ◽  
Standard Errors ◽  
Machine Time ◽  
The Past ◽  
First Approximation ◽  
Plane Solution ◽  
Earthquake Mechanism ◽  
Time Required

Abstract In its earthquake mechanism studies the Dominion Observatory has been producing solutions graphically, but a program based on a probability function defined by Knopoff has been written for the IBM 1620 which permits the best solution to be obtained by a series of successive approximations from a given first approximation. The program prints out the strike and dip of the two nodal planes, their standard errors, the azimuth and plunge of their line of intersection, and a list of the stations producing inconsistent data. Weights can be assigned to each station; in practice these weights would depend on the past reliablity of the station. The machine time required depends on the number of stations used, the accuracy of the first approximation and other factors; in general 20 to 30 minutes is required for a solution involving 30-40 stations.

A least squares method for earthquake mechanism determination using S-wave data

1964 ◽  
Vol 54 (6A) ◽  
pp. 2037-2047
Author(s):  
Agustin Udias
Keyword(s):  
Least Squares ◽  
Statistical Evaluation ◽  
Least Squares Method ◽  
Numerical Approach ◽  
Focal Mechanisms ◽  
Least Square ◽  
S Wave ◽  
Double Couple ◽  
Earthquake Mechanism

abstract In this paper a numerical approach to the determination of focal mechanisms based on the observation of the polarization of the S wave at N stations is presented. Least-square methods are developed for the determination of the orientation of the single and double couple sources. The methods allow a statistical evaluation of the data and of the accuracy of the solutions.

Model and theoretical seismicity

1967 ◽  
Vol 57 (3) ◽  
pp. 341-371 ◽  
Author(s):  
R. Burridge ◽  
L. Knopoff
Keyword(s):  
Numerical Model ◽  
Potential Energy ◽  
Main Sequence ◽  
Magnitude Scale ◽  
Laboratory Model ◽  
Earthquake Mechanism

abstract A laboratory and a numerical model have been constructed to explore the role of friction along a fault as a factor in the earthquake mechanism. The laboratory model demonstrates that small shocks are necessary to the loading of potential energy into the focal structure; a large part, but not all, of the stored potential energy is later released in a major shock, at the end of a period of loading energy into the system. By the introduction of viscosity into the numerical model, aftershocks take place following a major shock. Both models have features which describe the statistics of shocks in the main sequence, the statistics of aftershocks and the energy-magnitude scale, among others.

On determination of earthquake mechanism

1961 ◽  
Vol 4 ◽  
pp. 211-238 ◽  
Author(s):  
L.M. Balakina ◽  
E.F. Savarensky ◽  
A.V. Vvedenskaya
Keyword(s):  
Earthquake Mechanism
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