SCEC Workshop on Ductile Rheology of the Southern California Lithosphere
Conveners: Wayne Thatcher, Yuri Fialko, Liz Hearn, and Greg Hirth
Dates: May 1-2, 2013
Location: USGS Menlo Park Campus (Building 3, Room 3-235)
SCEC Award and Report: 13051
SUMMARY: The goals of the 2-day workshop are to share recent developments among experts in the properties and processes of ductile deformaton; define a range of viable rheological models for the lithosphere in actively deforming regions; better understand how to model ductile processes; and investigate how to apply this new knowledge base to constrain how ductile/elastic coupling influences stress state and earthquake occurrence in Southern California.
PARTICIPANTS (28 Total, 2 Remote): Whitney Behr (UT Austin), Greg Beroza (Stanford), Bruce Bills (NASA JPL), Roland Burgmann (UC Berkeley), Reid Cooper (Brown), Georg Dresen (GFZ Potsdam), Brian Evans (MIT), Uli Faul (BU), Yuri Fialko (UCSD), Andy Freed (Purdue), Laurel Goodwin (Wisconsin), Lars Hansen (Stanford), Jeanne Hardebeck (USGS), Liz Hearn, Eric Hetland (Michigan), Greg Hirth (Brown), Tran Huynh (SCEC), Kaj Johnson (Indiana), Karen Luttrell (USGS), Andreas Mavromatis (Stanford), Christine McCarthy (Columbia), Laurent Montesi (Maryland), Jessica Murray (USGS), John Platt (USC), Fred Pollitz (USGS), Paul Segall (Stanford), Wayne Thatcher (USGS), Jessica Warren (Stanford).
Presentation slides may be downloaded by clicking title. PLEASE NOTE: Files are the author’s property. They may contain unpublished or preliminary information and should only be used while viewing the talk.
WEDNESDAY, MAY 1, 2013
| 08:30 | Introduction and Purpose of Workshop | W. Thatcher |
| 08:40 | SCEC Perspective on Workshop | G. Beroza |
| 08:50 | Community Geodetic Model (CGM) & Rheology | J. Murray |
| 09:00 | Community Stress Model (CSM) & Role of Rheology | J. Hardebeck |
| Session 1: Space Geodetic Observations and Modeling of Earthquake Cycle Deformation Chair & Moderator: Liz Hearn, Reporter: Eric Hetland |
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| 09:10 | Lithospheric Rheology & the Earthquake Cycle | L. Hearn |
| 09:55 | Discussion of Previous Overview Paper | All |
| 10:15 | Break | |
| 10:30 | Short Presentations (10 minutes each) | |
| 11:00 | Open Discussion of Important Issues & Unanswered Questions | All |
| 12:30 | Lunch | |
| Session 2: Laboratory Perspectives on Ductile Flow Applicable to Earthquake Processes Chair & Moderator: Greg Hirth, Reporter: Ulrich Faul |
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| 13:30 | Lab Constraints on Lithospheric Ductile Flow | G. Hirth |
| 14:15 | Discussion of Previous Overview Paper | All |
| 14:45 | Short Presentations (10 minutes each)
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| 15:15 | Break | |
| 15:30 | Open Discussion of Important Issues & Unanswered Questions | All |
| 17:00 | Adjourn | |
| 18:30 | Workshop Group Dinner at the Left Bank Menlo Park | |
| THURSDAY, MAY 2, 2013 | ||
| Session 3: Field Evidence Bearing on Ductile Flow Beneath the Seismogenic Crust Chair & Moderator: John Platt; Reporter: Whitney Behr |
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| 08:30 | Faults in the ductile lithosphere: localization, rheology, flow stress, and width | J. Platt |
| 09:00 | Discussion of Previous Overview Paper | All |
| 09:30 | Short Presentations (10 minutes each) | |
| 10:00 | Break | |
| 10:15 | Open Discussion of Important Issues & Unanswered Questions | All |
| 11:45 | Constitutive relationships for viscoelastic flow in postseismic and earthquake cycle analyses: past, present, and future | R. Cooper / A. Freed |
| 12:00 | Lunch | |
| Session 4: Wrap Up Discussion of Main Problems & Workshop Recommendations All Contribute, Moderated by Conveners |
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| 13:00 | Summary Presentations from Session Reporters | |
| 13:45 | Discussion of Most Important Issues to Emerge from Workshop | |
| 14:30 | Recommendations to SCEC and Workshop Report | All |
| 15:00 | Adjourn | |
