HighF v14.12

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This page collects information about a proposed high frequency verification and validation exercise. Planning started in Dec 2014.

Station Lists

Source Description

Trimmed, low-pass filtered (fc=5Hz, Butterworth, 2 forward passes, 4 poles), 4300 points, dt=0.001s (and plot of what is should look like).

Volume

The four corners are:

  • -119.288842 34.120549
  • -118.354016 35.061096
  • -116.846030 34.025873
  • -117.780976 33.096503

Volume size:

  • 180,000 m x 135,000 m x 61,875 m = 1.503e15 m3

1D Velocity Model Definition

Simulation Box / Velocity Model

Parameter Value Notes
Dimensions (km) 180 x 135 x 61.875 (31 km for 1d Model)
Bounding Box (LL) -119.288842 34.120549, -118.354016 35.061096, -116.846030 34.025873, -117.780976 33.096503
Rotation Angle 39.9
UCVM Version 14.3.0 No heterogeneities
Velocity Model Versions CVM-S4v26
Miniumum Vs 500 m/s
Samples per wavelength 6 to 7 - AWP 10 to 12 - Hercules


Point Source Parameters

Parameter Value Notes
Event Name La Habra
Mw 5.1 Ref: http://www.scsn.org/2014lahabra.html
Moment 5.764 E+23 Dyne-cm Source: En-Jui
Origin Time 2014/03/29 04:09:42.97 Source: En-Jui
Origin Location -117.930; 33.922; 5.0km Source: En-Jui
Strike/Dip/Rake 239/70/38 Source: En-Jui, based on review of aftershock sequence
Rise Time 0.75 s

Solver Parameters

Parameter Value Notes
Frequency 4.0 Hz
Simulation Length (Duration) 100 s
Delta T 0.005
Plane Output Resolution 250m
I/O Print Rate every 10 steps
Station List TBD
Software Version TBD


Fig 1:Location of La Habra Main Shock and aftershocks, used to select preferred fault plane solution. (Image Credit: En-Jui Lee)

High-F VandV Exercise Planning Documents (2015)

High-F Project Plan (2012)

Agreements Needed

  • Simulation Volumes
  • Rotation Angle
  • Projections used
  • Points per wavelength used
  • Number and location of sites used for ground motion comparison
  • Proposed Station List to save results
  • La Habra Point Source parameters
  • Currently available code capabilities in GPU codes
    • small scale heterogeneities
    • FDQ
    • Plasticity
    • dynamic rupture source
  • V and V exercise stages - need to be reviiewed and approved

Related Entries

References Used

  • Taborda, R. and J. Bielak (2013). Ground-motion simulation and validation of the 2008 Chino Hills, California, earthquake, Bull. Seismol. Soc. Am. 103, no. 1, 131–156, doi 10.1785/0120110325.