Chino Hills 1D and 3D

SCEC researchers are comparing the differences between Chino Hills simulations using 1D methods, based on the Broadband Platform, and 3D methods, based on SCEC 3D codes including Hercules-GPU and AWP-GPU.

BBP Chino Hills Evaluation Methods

SCEC BBP researchers use the Chino Hills earthquake as a validation event. They have defined a 1D velocity model for the region, selected a consensus fault geometry and earthquake magnitude, and selected a set of ground motion observations for use in comparisons to synthetics.

BBP Velocity Model for Chino Hills

In the following file, the first line indicates how many layers compose the velocity model. The following lines, one for each layer, describes the layer in details. The first column is the thickness of the layer (in kilometers). The second and third columns are Vp and Vs, respectively, both in km/s. The forth column contains the rho value (in g/cm3), while the last two columns contain the Qp and Qs parameters respectively.

18
 0.0020   1.7000   0.4500   2.0000    45.00    22.50
 0.0040   1.8000   0.6500   2.1000    65.00    32.50
 0.0060   1.8000   0.8500   2.1000    85.00    42.50
 0.0080   1.9000   0.9500   2.1000    95.00    47.50
 0.0100   2.0000   1.1500   2.2000   115.00    57.50
 0.0700   2.4000   1.2000   2.2000   120.00    60.00
 0.2000   2.8000   1.4000   2.3000   140.00    70.00
 0.2000   3.1000   1.6000   2.4000   160.00    80.00
 0.2000   3.4000   1.8000   2.4500   180.00    90.00
 0.3000   3.7000   2.1000   2.5000   210.00   105.00
 2.0000   4.4000   2.4000   2.6000   240.00   120.00
 2.0000   5.1000   2.8000   2.7000   280.00   140.00
 1.0000   5.6000   3.1500   2.7500   315.00   157.50
 5.0000   6.1500   3.6000   2.8250   360.00   180.00
 5.0000   6.3200   3.6500   2.8500   365.00   182.50
 5.0000   6.5500   3.7000   2.9000   370.00   185.00
10.0000   6.8000   3.8000   2.9500   380.00   190.00
999.0000   7.8000   4.5000   3.2000   450.00   225.00

Chino Hills Source Description in SRC Format

MAGNITUDE = 5.39
LAT_TOP_CENTER = 33.939
LON_TOP_CENTER = -117.771
STRIKE = 296
DIP = 66
RAKE = 146
FAULT_LENGTH = 6.30
FAULT_WIDTH = 4.60
DEPTH_TO_TOP = 12.79 
HYPO_ALONG_STK = 0.0
HYPO_DOWN_DIP = 2.30
DLEN = 0.1
DWID = 0.1
SEED = 4745706

Chino Hills Source Description in SRF Format

• Chino Hills SRF File

Chino Hills Station List

(Please only use first 3 columns as lat, long, station_id).

#BBP Station List for EQID=25 (Chino Hills)
#SLong    SLat     RSN   Rrup(km)  Vs30(m/s) LoPass_Freq(Hz) HiPass_Freq(Hz)  Obs_File
-117.803 33.927  25029  12.6   378 0.0500  111.1111    CHINOH/25029_N.acc
-117.820 33.912  25040  13.2   374 0.1375  111.1111    CHINOH/25040_N.acc
-117.896 33.933  25028  15.6   396 0.1000  111.1111    CHINOH/25028_N.acc
-117.817 33.854  25027  16.0   359 0.1000  111.1111    CHINOH/25027_N.acc
-117.789 33.829  25022  16.9   440 0.4750  111.1111    CHINOH/25022_N.acc
-117.951 34.010  25024  20.2   342 0.3375  111.1111    CHINOH/25024_N.acc
-117.807 34.092  25017  20.4   462 0.3250  111.1111    CHINOH/25017_N.acc
-117.844 33.788  25013  21.7   318 0.2625  111.1111    CHINOH/25013_N.acc
-117.562 34.005  25010  22.6   335 0.3625  111.1111    CHINOH/25010_N.acc
-117.609 33.795  25015  22.7   699 0.4250  111.1111    CHINOH/25015_N.acc
-117.911 34.132  25031  26.4   363 0.1000  111.1111    CHINOH/25031_N.acc
-117.638 34.121  25014  26.8   388 0.3250  111.1111    CHINOH/25014_N.acc
-117.439 34.100  25005  36.2   335 0.4000  111.1111    CHINOH/25005_N.acc
-118.102 34.150  25006  38.3   383 0.2500  111.1111    CHINOH/25006_N.acc
-118.178 34.037  25001  38.8   349 0.2750  111.1111    CHINOH/25001_N.acc
-117.879 33.597  25007  40.6   389 0.2750  111.1111    CHINOH/25007_N.acc
-117.321 33.920  25035  40.9   557 0.1750  111.1111    CHINOH/25035_N.acc
-118.058 34.224  25012  41.2   760 0.3000  111.1111    CHINOH/25012_N.acc
-118.230 34.096  25032  45.2   370 0.1250  111.1111    CHINOH/25032_N.acc
-117.365 34.205  25036  47.9   495 0.1875  111.1111    CHINOH/25036_N.acc
-118.315 33.909  25030  49.8   354 0.0625  111.1111    CHINOH/25030_N.acc
-118.294 33.713  25004  54.4   393 0.2875  111.1111    CHINOH/25004_N.acc
-118.377 33.896  25034  55.5   332 0.1000  111.1111    CHINOH/25034_N.acc
-117.235 34.232  25019  58.6   393 0.4750  111.1111    CHINOH/25019_N.acc
-117.367 34.366  25008  60.4   365 0.2875  111.1111    CHINOH/25008_N.acc
-118.404 33.743  25018  62.0   530 0.3000  111.1111    CHINOH/25018_N.acc
-116.959 33.787  25025  75.0   306 0.1125  111.1111    CHINOH/25025_N.acc
-116.931 33.744  25026  78.6   351 0.1375  111.1111    CHINOH/25026_N.acc
-118.560 34.277  25037  80.5   450 0.1125  111.1111    CHINOH/25037_N.acc
-118.646 34.059  25021  80.5   750 0.2375  111.1111    CHINOH/25021_N.acc
-118.299 34.687  25002  95.0   347 0.2500  111.1111    CHINOH/25002_N.acc
-116.717 33.708  25033  98.6   845 0.1375  111.1111    CHINOH/25033_N.acc
-118.905 34.281  25011 109.6   355 0.1375  111.1111    CHINOH/25011_N.acc
-116.390 33.917  25038 125.2   388 0.2000  111.1111    CHINOH/25038_N.acc
-117.230 32.875  25039 126.8   388 0.3125  111.1111    CHINOH/25039_N.acc
-116.378 33.648  25016 130.5   786 0.2625  111.1111    CHINOH/25016_N.acc
-119.138 34.437  25020 135.7   351 0.2125  111.1111    CHINOH/25020_N.acc
-116.846 32.891  25003 142.6   805 0.2500  111.1111    CHINOH/25003_N.acc
-116.226 33.575  25023 146.1  1100 0.2500  111.1111    CHINOH/25023_N.acc
-116.041 34.227  25009 160.1  1188 0.2875  111.1111    CHINOH/25009_N.acc

Chino Hills Broadband Platform Output

• Output for best realization

BBP La Habra Seismograms

BBP La Habra Simulation 6 Seismograms

Sample LF Seismogram file in BBP Format

# LP Sim NGAH, stat=FRD
#    time(sec)      N-S(cm/s)      E-W(cm/s)      U-D(cm/s)
0.000000e+00    2.825620e-08    5.209200e-10    -5.558530e-08
2.500000e-02    -1.010070e-07   5.667850e-07    1.468970e-07
5.000000e-02    -1.182370e-07   -3.640960e-07   -1.177720e-07
7.500000e-02    9.593570e-08    5.037590e-07    4.191010e-08
1.000000e-01    -7.050750e-08   -4.319790e-07   -7.905130e-08
1.250000e-01    9.230950e-08    4.570090e-07    8.472100e-08
1.500000e-01    -8.961420e-08   -4.516160e-07   -8.670470e-08
1.750000e-01    7.846830e-08    4.504290e-07    6.739040e-08
2.000000e-01    -9.872560e-08   -4.366750e-07   -7.091230e-08
...

Attenuation Model Used

Check the 3D simulations so that Qp Qs used are equivalent to what was used in BBP simulations.

Runs

Hercules Runs

Run Number	Etree	Source	Stations	Notes
1	ch-cvms426-223-4hz-200ms.e	extended-ricardo-run1
2	ch-bbp1d-4hz-200ms.e	extended-ricardo-run2

Related Entries

• La_Habra_Simulations_on_Titan
• Hercules
• Broadband Platform