1. LA Basin Story Tectonics Geology Faults Velocity Structure Seismicity
Deformation
Basin Effects
Site Effects
Scenarios
PSHA

2. Geological Setting Deep Basins
Bounding Faults both thrust and strike-slip

3. Faults That Can Affect LA

4. LA Basin Sources

5. Using Industry and Seismic Data to Infer Fault Geometry

6. Seismicity in LA Area

7. Active Investigation of the Structure
LARSE 1
Reflections beneath the San Gabriel Mountains
Source region for M ~6 and possible M > 7

8. LARSE 2 Source region of Northridge
Structure between Northridge and Santa Monica
San Andreas in the source region of 1812, 1857

9. Cross sections of northern LA Basin
Preliminary structure for Santa Monica
From Yeats

10. 3D Velocity Structure

11. Isotach Surface for Vs 2.5 km/s

14. Northridge Source and Ground Motion

15. Site Effects from Earthquakes
Phase 3 results
Site effects with some correlation to geology
Data from SCEC SMDB

16. Measuring Deformation in the LA Basin
SCIGN GPS Network
Determine the deformation across the LA Basin

17. Using InSAR to Observe the Deformation
Northridge earthquake
Focus on LA
Complementary to SCIGN

18. LA Basin Story: Integration of SCEC’s Broadbased Scientific Scope The Beginning