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SCEC Dynamic Rupture Group Ingredients Workshop on Fault Geometry

Conveners: Ruth Harris and Michael Barall
Dates:  November 30, 2018
Location: Kellogg West Conference Center, Pomona, CA
SCEC Award and Report:18217

SUMMARY: The SCEC Dynamic Rupture Group will convene a workshop in 2018 to start an in-detail examination of the essential ingredients needed to understand earthquakes and produce viable large-earthquake source simulations. In 2018, we will focus on fault geometry. We have invited speakers from both outside and inside our group to present their ideas about the role(s) of fault geometry, both the small scale and the big scale, in determining rupture extent, ground shaking, and seismic hazard. We have knowledge that complex geometry at all scales exists in the field (e.g., Segall and Pollard, 1980 and references therein; Candela et al., 2012, etc.), and we can computationally simulate this roughness at some scales (e.g., Duru and Dunham, 2016; Shi et al., 2013, Ulrich and Gabriel, 2017), but we need to know if fault geometry at all scales makes a difference for earthquake source features such as rupture extent, and if it makes a difference for hazard. 


09:00 - 09:30 Workshop Check-In  
  Session 1: Overview, Motivation, and Desired Outcomes  
09:30 - 09:45 Welcome and Overview of Workshop Objectives, Introductions Ruth Harris
  Session 2: What Does Fault Geometry Look Like?  
09:45 - 10:10 Observations from the Field - Big Scale - Community Fault Model (CFM) (PDF, 1.5MB) Craig Nicholson
10:10 - 10:35 Inferences from the Field - Big Scale - Effects of Geometry on Earthquake Ruptures (PDF, 2.5MB) Glenn Biasi
10:35 - 11:00 Observations from the Field - Big and Small Scale Jamie Kirkpatrick
11:00 - 11:15 Discussion - Observations All
11:15 - 11:30 Break  
  Session 3: Fault Geometry Applications - Hazards  
11:30 - 11:55 Fault Geometry Decisions and Alquist Priolo (PDF, 1.8MB) Tim Dawson
11:55 - 12:20 Fault Geometry Decisions and UCERF3 (Rupture Extent) Morgan Page
12:20 - 12:30 Discussion All
12:20 - 13:30 Lunch  
  Session 4: Fault Geometry Applications - EQ’s and Scenarios  
13:30 - 13:55 Fault Geometry Effects and the 1992 Landers earthquake Stephanie Wollherr
13:55 - 14:20 The role of 3D fault geometry in the rupture propagation and arrest during the 2016 Kaikoura (New Zealand) earthquake (PDF, 1.5MB) Yoshi Kaneko
14:20 - 14:45 Large EQ Scenarios for the Eastern San Gorgonio Pass Roby Douilly
14:45 - 15:10 Large Earthquakes Near Cajon Pass Julian Lozos
15:10 - 15:25 Break  
15:25 - 15:50 Earthquake Rupture on 3D Rough Faults (PDF, 1.9MB) Steve Day
15:50 - 16:15 Fault Geometry and Multi-Cycle Models: From Single-Event Dynamics to Multicycle Dynamics of Geometrically Complex Faults (PDF, 9MB) Ben Duan
16:15 - 16:40 Fault Geometry and Ground Motions Ralph Archuleta
16:30 - 17:30 Discussion and Future Plans All
17:30 Workshop Adjourns  


*Remote Participants