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2008 Annual Meeting: Extreme Ground Motion Workshop

Conveners: Tom Hanks and Norm Abrahamson
Dates: September 6-7, 2008
Location: Plaza Ballroom AB, Hilton Palm Springs Resort

The third annual Extreme Ground Motion (ExGM) Workshop will consist of two sessions, the first on Saturday afternoon, September 6, 13:00-18:00, and the second on Sunday morning, September 7, 08:00-12:00. The first session will feature more recent results than those presented at the Extreme Ground Motion special sessions at the Seismological Society of America Annual Meeting in April 2008. We will also lay out the ExGM Endgame as we presently envision it, now that we are three years into the ExGM Program, with just two remaining before the ExGM Final Report is due.

The Sunday morning session will be devoted to precarious-rock research, as performed by scientists funded by ExGM at Yucca Mountain and by scientists funded by SCEC in southern California. The focus will be on turning precarious rocks into real seismic hazard constraints, which requires both the amplitude of toppling ground motions and the age for which the rock has been precarious.


Saturday, September 6th  
13:00 Introduction T. Hanks, N. Abrahamson
13:10 Laboratory Studies of Stress-Induced Compaction of the Calico Hills Formation D. Lockner and C. Morrow
13:30 Steps Toward Validation of Physical Limits to Earthquake Ground Motion J. Andrews
13:50 Insights on Fault-Zone Damage from Modeling a 3-D Dynamic Rupture with Material Yielding S. Ma
14:10 Sensitivity of Ground Motion at Yucca Mountain to Uncertainties in Fault Geometry and Fault-Zone Structure B. Duan, S. Day
14:30 Dynamic Rupture Simulation of the Solitario Canyon Fault via the Elastic-Lattice Method M. Purvance
14:50 Spatial Correlation Between Kinematic Source Parameters Derived From Dynamic Rupture Simulations J. Schmedes, R. Archuleta, D. Lavallee
15:15 Break  
15:30 Gradual Modifications to the Yucca Mountain Landscape over the Past Million Years J. Whitney, T. Hanks
16:10 Age and Long Term Stability of Rock Outcrops in the Vicinity of Yucca Mountain M. Stirling
16:30 Extreme Ground Accelerations from Very Shallow Earthquakes Driven by Dynamic Stress N. Sleep
16:50 Points in Hazard Space N. Abrahamson, T. Hanks
17:10 The ExGM Endgame T. Hanks, N. Abrahamson, T. Jordan
17:30 The ExGM Endgame: Ground Motion Simulations R. Archuleta
17:50 Comments and Discussion  
18:00 Adjourn  
Sunday, September 7th  
08:00 Introduction L. Grant-Ludwig, T. Hanks
08:05 Precarious Rocks as a Subset of Fragile Geologic Structures T. Hanks
08:20 Geomorphic and Tectonic Setting of the Grass Valley PBR Site i teh San Bernardino Mountains K. Kendrick
08:40 How Do We Date a PBR?: Testing Geomorphic Models Using Surface-Exposure Dating and Numerical Methods D. Rood, J. Brune, K. Kendrick, M. Purvance, R. Anooshehpoor, L. Grant-Ludwig, G. Balco
09:00 Cosmogenic and Soil Age Constraints on PBRs in New Zealand M. Stirling
09:20 A Comparative Assessment of the Geomorphologic Setting and Geologic Context of Zones of PBR's in Low-Seismicity Regions R. Arrowsmith
09:40 Statistical Study of PBRs at Lovejoy Buttes, Victorville and Granite Pediment J. Brune
10:00 Break  
10:20 Fragilities Derived from Simulations Using Andrews' Calculations M. Purvance
10:40 Quantitative Analysis of PBR's: What We Need to Know D. O'Connell
11:00 Birth, Life, and Death of PBR's: A Discussion R. Arrowsmith, M. Purvance, D. O'Connell, moderated by L. Grant-Ludwig
11:50 Wrap-Up Discussion L. Grant-Ludwig
12:00 Adjourn