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During the ruptures of an earthquake,the strain energy.△E,.will be transferred into,at least,three parts,i.e..the seismic radiation energy(E_s),fracture energy(E_g),and frictional energy(E_f),that is,△E = E_s + E_g + E_f.Friction,which is represented by a velocity- and state-dependent friction law by some researchers,controls the three parts.One of the main parameters of the law is the characteristic slip displacement.D_c.It is significant and necessary to evaluate the reliable value of D_c from observed and inverted seismic data.Since D_c controls the radiation efficiency.η_R = E_s/(E_s+ E_g),the value of η_r is a good constraint of estimating D_c.Integrating observed data and inverted results of source parameters from recorded seismograms.the values of E_s and E_g of an earthquake can be measured,thus leading to the value of η_R.The constraint used to estimate the reliable value of D_c will be described in this work.An example of estimates of D_c.based on the observed and inverted values of source parameters of the September 20,1999 M_S 7.6 Chi-Chi(Ji-Ji).Taiwan region,earthquake will be presented.
ΔE, .will be transferred into, at least, three parts, ie. The seismic radiation energy (E_s), fracture energy (E_g), and frictional energy (E_f), that is, ΔE = E_s + E_g + E_f.Friction, which is represented by a velocity- and state-dependent friction law by some researchers, controls the three parts. One of the main parameters of the law is the characteristic slip displacement. D_c .It is significant and necessary to evaluate the reliable value of D_c from observed and inverted seismic data. Since D_c controls the radiation efficiency. Η_R = E_s / (E_s + E_g), the value of η_r is a good constraint of estimating D_c.Integrated observed data and inverted results of source parameters from recorded seismograms. the values of E_s and E_g of an earthquake can be measured, thus leading to the value of η_R. constraint used to estimate the reliable value of D_c will be described in this work. An example of estimates of D_c.based on the observed and inve rted values of source parameters of the September 20, 1999 M_S 7.6 Chi-Chi (Ji-Ji) .Taiwan region, earthquake will be presented.