Electronic Supplement to
Some revisions to parameters used in stochastic-method simulations of ground motion: durations and crustal amplifications

by David M. Boore and Eric M. Thompson

This Electronic Supplement contains links to files with the coefficients for evaluating D_RMS (equation 11) in the main article for both ACR and SCR. The files also contain TD/RV ratios for peak acceleration and peak velocity. The coefficients and TD/RV ratios are given for a wide range of magnitudes (2 to 8) and distances (2 km to 1262 km). For an arbitrary distance and magnitude, log D_RMS should be evaluated at the four adjacent M-R pairs, which should then be bilinearly interpolated. The same procedure is used to find TD/RV at the desired M and R_PS.

This supplement also contains links to the SMSIM parameter files used in the various time domain (TD) and random vibration (RV) simulations used to derive the equation (11) coefficients, as well as to evaluate the performance of the coefficients for models not used in deriving the coefficients.

The files can be obtained by clicking on the colored text at the beginning of each entry.

Stable Continental (SCR) Files

SCR Coefficients

• bt15_ena_scr_trms4osc.dk_rms2pk.pars. This is a text file containing the coefficients for evaluating log D_RMS (equation 11) for stable continental regions (SCRs). These coefficients were derived from the TD and RV simulations with the ena.scf.dp_bt14e.bs11_atten.xfff.dmb_3kps_amps_aoi_00.k0.006.xosc.params parameter file. The coefficients are to be used with random vibration simulations that use the DK R2PFs.

SMSIM Parameter Files for SCRs

• ena.scf.dp_bt14e.bs11_atten.xfff.dmb_3kps_amps_aoi_00.k0.006.xosc.params. --parameters for deriving the SCR coefficients and the TD/RV ratios displayed in the first row of Figure 7.
• ena.scf.dp_bt14e.bs11_atten.xfff.dmb_3kps_amps_aoi_00.k0.006.bt15e_drms.params. --parameters for computing the TD/RV ratios displayed in the second row of Figure 7, as well as the ratios displayed in the first and second rows of Figure 8. The stress parameters for each run were specified in the SMSIM programs tmrs_loop_td_drvr and tmrs_loop_rv_drvr as follows: 275 bars for Figure 7 and 69 and 1100 bars for the first and second rows of Figure 8, respectively. The RV values make use of the new D_RMS coefficients derived in this paper.
• ena.scf_400b.dp_ab95.a04atten.x_fff.dmb_3kps_amps_aoi_00.k0.006.bt15e_drms.params. --parameters for computing the TD/RV ratios displayed in the third row of Figure 8. The RV values make use of the new D_RMS coefficients derived in this paper.
• ena.a93_source.dp_bt14e.bs11_atten.xfff.dmb_3kps_amps_aoi_00.k0.006.bt15e_drms.params. --parameters for computing the TD/RV ratios displayed in the fourth row of Figure 8. The RV values make use of the new D_RMS coefficients derived in this paper.

Active Crustal Regions (ACR) Files

ACR Coefficients

• bt15_wna_acr_trms4osc.dk_rms2pk.pars. This is a text file containing the coefficients for evaluating log D_RMS (equation 11) for active crustal regions (SCRs). These coefficients were derived from the TD and RV simulations with the wna.scf_100b.xfff.rea99_atten.bt14_dp.revised_bj97_rock_amps.k0.03.xosc.params parameter file. The coefficients and are to be used with random vibration simulations that use the DK R2PFs

SMSIM Parameter Files for ACRs

• wna.scf_100b.xfff.rea99_atten.bt14_dp.revised_bj97_rock_amps.k0.03.xosc.params. --parameters for deriving the ACR coefficients and the TD/RV ratios in this article.

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