1. Computing Scenario Shaking For Nevada Urban Areas With The Model Assembler Community Modeling Environment (MA-CME)
J. Louie and L. Preston
Nevada Seismological Laboratory
S. Larsen
Lawrence Livermore National Laboratory
Liz Lenox, Rei Arai, and Amr Wakwak
Dept. Geological Sciences and Engineering, UNR
J. Louie, SSA 4/12/2007

2. MA-CME provides a tutorial GUI to E3D Set up a Grid:
J. Louie, SSA 4/12/2007

3. Define an Earthquake Source:
J. Louie, SSA 4/12/2007

4. Genoa – Mount Rose Scenario: MA-CME adds Geotech & Basins
Scott et al. (2004) Vs30 transect.
Pancha measurements at ANSS stations.
“Quadrant” interpolation between scattered measurements, respecting geologic map.
Vs30=500 m/s assumed on sediment, 760 m/s (white and cyan) on rock.
J. Louie, SSA 4/12/2007

5. Genoa – Mount Rose Scenario: MA-CME adds Geotech & Basins
Three datasets, not well stitched together:
Geologic map with basin depths assumed from bedrock proximity, in California.
Jachens et al. USGS basin gravity inversions for Basin & Range; sedimentary plus Tertiary volcanic basins.
Abbott & Louie (2000) Reno basin gravity study.
J. Louie, SSA 4/12/2007

6. Genoa Fault – Mount Rose Fault Systems
West Reno basin, above end of rupture, has 5x the PGV of any other basin near fault.
Highest shaking not correlated with basin depth- Tahoe artificially deep in this model.
Dataset boundaries not interfering with these conclusions.
J. Louie, SSA 4/12/2007

7. Frenchman Mountain Fault
PGV >5 cm/s above west-dipping fault at 0.3 Hz.
Sub-basins contain the greatest shaking.
J. Louie, SSA 4/12/2007

8. Frenchman Mountain Fault
Schools closest to the fault experience greatest PGV but shortest durations.
J. Louie, SSA 4/12/2007

9. Northern Death Valley Fault Zone
Animation combines inputs and outputs.
E3D computation at 0.3 Hz on a 281x251 grid with dh=1 km.
Infinite Q.
The two rupture scenarios have very different effects.
Get the scenario animations on your cell phone from
J. Louie, SSA 4/12/2007

10. Northern Death Valley Fault Zone
Ratio of PGV from rupture toward LVV, over away.
Largest amplifications due to directivity are in bedrock.
Some margins of LVV also show 1500% amplifications.
J. Louie, SSA 4/12/2007

11. Northern Death Valley Fault Zone
Compare PGV of 2679 areas, each 1-km2, in LVV against Vs30 and Z2.0.
J. Louie, SSA 4/12/2007

12. Northern Death Valley Fault Zone
Vs30 affecting 1.5-km waves!
J. Louie, SSA 4/12/2007

13. Northern Death Valley Fault Zone
J. Louie, SSA 4/12/2007

14. Conclusions
Students can use MA-CME to set problems up, but plotting and visualizing are still lots of work.
Scenario Results:
M7.5 Genoa–Mt. Rose– Reno basin gets 5 times the PGV of any other.
M5.0 Frenchman Mtn.– high PGV accompanied by short duration.
M7.5 No. Death Valley– rupture toward city produces up to 15 times the PGV as rupture away.
At long periods, 0.3 Hz, E3D is producing huge uncertainties in PGV.
J. Louie, SSA 4/12/2007