Data Sources
seismicity/relocation
travel time tomography
industry reflection data
waveform modeling
receiver function analysis
teleseismic travel times
LARSE-like experiments
geologic structure models
well-log data
geotechnical (near-surface) data
surface wave dispersion
marine profiles
gravity (for density)
Uses of the Model
seismicity catalogue locations
strong motion modeling
tectonic/stress modeling
geologic and rheology models
Scale of Model
regional S. California component
densification in the greater LA Basin region
area/fault specific component
lower crust and upper mantle component
Possible Parameterization of the Model
3D sampled models (i.e. tomography style)
rule-based (velocity derived from empirical rules based on
depth, age and other attributes; Magistrale's model
is an example of this)
iso-surface [depth(x,y) for a particular velocity/horizon]
point/line samples (borehole measurements, 2D refraction lines)
Issues
model parameterization and construction
validation - how and with what to test the model
integrity - how do we keep a master model when various groups
may be updating it. How to we add updates that are
based on alternative parameterizations
how do we derive specialized version of the model, i.e. smooth
models for ray tracers, and lower dimensional models
for surface wave analysis.
Starting Models
Magistrale's rule based model
Hauksson's travel time tomography models
Grave's strong motion waveform model
Kohler's Upper Mantle model