publication . Other literature type . Article . 2010

Computation and scaling of moment magnitudes

John Clinton; Bettina Allmann; Benjamin Edwards; Donat Fäh;
Open Access
  • Published: 01 Oct 2010
  • Publisher: Oxford University Press (OUP)
  • Country: Switzerland
SUMMARY Moment magnitudes (M W) are computed for small and moderate earthquakes using a spectral fitting method. 40 of the resulting values are compared with those from broadband moment tensor solutions and found to match with negligible offset and scatter for available M W values of between 2.8 and 5.0. Using the presented method, M W are computed for 679 earthquakes in Switzerland with a minimum M L = 1.3. A combined bootstrap and orthogonal L1 minimization is then used to produce a scaling relation between M L and M W. The scaling relation has a polynomial form and is shown to reduce the dependence of the predicted M W residual on magnitude relative to an exi...
free text keywords: Fourier analysis; Inverse theory; Earthquake ground motions; Earthquake source observations; Seismic attenuation, Fourier analysis, Inverse theory, Earthquake ground motions, Earthquake source observations, Seismic attenuation, Geochemistry and Petrology, Geophysics, Attenuation, Computation, Moment magnitude scale, Seismology, Residual, Mathematical analysis, Linear scale, Physics, symbols.namesake, symbols, Scaling, Magnitude (mathematics)
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