Broadband Data Products

This page contains a basic description of some of the data products produced by the Broadband Platform while running a simulation. All the data products described below will be in the outdata directory after a simulation completes.

Scenario Simulations

Scenario simulations are hypothetical simulations, what-if scenarios. Users provide a source description file describing the rupture and a station list file containing stations for which ground motions will be calculated.

Station Map

A map showing the fault trace along with the stations for which ground motions are calculated. The yellow star shows the hypocenter location.

Rupture Model

Velocity and Acceleration Seismograms

The Broadband Platform will produce both velocity and acceleration seismograms in BBP format for each station. An example is shown below.

# Sim NGAH, stat=2001-SCE
#    time(sec)      N-S(cm/s)      E-W(cm/s)      U-D(cm/s)
0.000000e+00    -4.532020e-05   2.096500e-05    1.781130e-04
2.500000e-02    -8.685250e-05   4.299330e-05    3.587300e-04
5.000000e-02    -1.234730e-04   6.599000e-05    5.400660e-04
7.500000e-02    -1.540990e-04   8.986040e-05    7.203370e-04
1.000000e-01    -1.777220e-04   1.145130e-04    8.978090e-04
...
...
1.022750e+02	9.947510e-04	2.843360e-06	-1.606000e-03
1.023000e+02	9.947510e-04	2.843220e-06	-1.606000e-03
1.023250e+02	9.947520e-04	2.843170e-06	-1.606000e-03
1.023500e+02	9.947520e-04	2.843150e-06	-1.606000e-03
1.023750e+02	9.947520e-04	2.843150e-06	-1.606000e-03

RotD50 for Each Station

A file containing the RotD50 values for 63 periods from 0.01s to 10s.

#  Psa5_N Psa5_E RotD50
#     63    0.0500
   0.0100 .45593E+00 .42564E+00 .40887E+00
   0.0110 .45659E+00 .42605E+00 .40943E+00
   0.0120 .45732E+00 .42650E+00 .41005E+00
   0.0130 .45812E+00 .42700E+00 .41074E+00
   0.0150 .45994E+00 .42813E+00 .41192E+00
...
...
   6.0000 .21332E-01 .63760E-02 .15788E-01
   6.5000 .19264E-01 .61713E-02 .14437E-01
   7.5000 .15063E-01 .50374E-02 .11496E-01
   8.5000 .11519E-01 .37930E-02 .88838E-02
  10.0000 .77129E-02 .28189E-02 .59970E-02

Validation Simulations

Validation simulations can be used to calculate seismograms from historical events and compare these again recorded ground motion data, allowing scientists to develop and validate their methods. For this reason, only locations where recorded ground motions are available can be used. In addition to all data products described above for scenario simulations, the following data products will also be calculated:

Seismogram Comparison Plots

Plots showing calculated data (in red) along with observation data (in black). The two bottom plots show a comparison of the arias duration between simulations and recorded data.

PSA Comparison Plots

Goodness-of-Fit Plot

Map Goodness-of-Fit Plot

Distance Goodness-of-Fit Plot

Anderson GOF

The Anderson GOF produces plots showing results from the following 10 metrics:

Anderson GOF Metrics

Index	Metric
C1	Arias Duration
C2	Energy Duration
C3	Arias Intensity
C4	Energy Integral
C5	Peak Acceleration
C6	Peak Velocity
C7	Peak Displacement
C8	Response Spectra
C9	Fourier Spectra
C10	Cross Correlation

Per Station Plots

Summary Plots

References

1. Anderson, J. G (2004) Quantitative Measure of the Goodness-of-Fit of Synthetic Seismograms, 13th World Conference on Earthquake Engineering, Vancouver, Canada, August 1-6, 2004, Paper No. 243.