Intermountain West Workshop

June 13-14, 2012

Officer's Club, University of Utah, Salt Lake City, Utah

The links in the following agendas are to PDF files of participants that have granted permission to view their presentations at the INW workshop.

Workshop Agenda for Update of Intermountain West Region of U.S. National Seismic Hazard Maps

Wednesday June 13th

Introduction & Overview

Review 2008 model and proposed changes (Petersen) 30 min
Recent research leading to improvements in the maps (Crone)
On-line resources (Powers)
BRPEWG II summary (Lund)

Review of BRPEWG geology recommendations and results(Haller, Powers)

Uncertainty in source dip
Characterization of source maximum M
Slip-rate uncertainty
Modeling antithetic sources

Open discussion & recommendations from participants

Recommendations from IMW States

Chris Eisinger (Colorado Geological Survey)
Mike Stickney (Montana Bureau of Mines and Geology)
Seth Wittke (Wyoming Geological Survey)
Phil Pearthree (Arizona Geological Survey)
Craig dePolo (Nevada Bureau of Mines and Geology)
Bill Lund (Utah Geological Survey)

Additional topics

A proposed revision to the NSHM generalization of the Salt Lake City segment (Wasatch fault) surface trace (Pechmann)
Working Group on Utah earthquake probabilities (Wong)
Issues on implementing geodetic deformation estimate of fault slip rates and its application to the seismic hazard analysis (Zeng)
Low footwall accelerations and variable surface rupture behavior on the Fort Sage Mountains fault, NE California (Briggs)

Thursday June 14th

Seismology(Moschetti)

Catalog declustering and non-tectonic seismicity
Seismicity rates used in smoothed-gridded seismicity
Alternative catalogs
Issues in Considering Alternative Earthquake Catalogs for the NSHMP—Utah Catalog Example (Arabasz)
Hawthorne earthquake (Anderson)

Review of BRPEWG seismology recommendations and results(Moschetti, Petersen)

Magnitude uncertainty in the seismicity catalogs used in the NSHMs
Constraining maximum M for background seismicity
Smoothing background seismicity
Magnitude-frequency relations for individual fault sources
Mismatch of modeled earthquake rate versus historical earthquakes

Open discussion & final recommendations from participants

Participant recommendations to the NSHMP

Estimation of uncertainty (Shome)
Comparison of GPS and geologic rates (Smith)
Final thoughts (Anderson)

Summary of final recommendations to the NSHMP(Petersen)

Attendees

John Anderson, University of Nevada, Reno
Stephen Angster, USGS
Walter Arabasz, University of Utah
James Bela, Oregon Earthquake Awareness
Glenn Biassi, University of Nevada, Reno
Steve Bowman, Utah Geological Survey
Rich Briggs, USGS
Tony Crone, USGS
Craig dePolo, Nevada Bureau of Mines and Geology
Sarah Derouin, Bureau of Reclamation
Chris DuRoss, Utah Geological Survey
Chris Eisinger, Colorado Geological Survey
Jamie Farrell, University of Utah
Emily Gibson, Defense Nuclear Facilities Safety Board
Kathy Haller, USGS
Jeff Kimball, Defense Nuclear Facilities Safety Board
Bill Lund, Utah Geological Survey

Fredrick Massin, University of Utah
Morgan Moschetti, USGS
Dean Ostenaa, Fugro Consultants Inc.
Phil Pearthree, Arizona Geological Survey
Jim Pechmann, University of Utah
Steve Personius, USGS
Mark Petersen, USGS
Lucy Piety, Bureau of Reclamation
Peter Powers, USGS
Richard Quittmeyer, Paul C. Rizzo Associates, Inc.
Nilesh Shome, Risk Management Solutions
Bob Smith, University of Utah
Mike Stickney, Montana Bureau of Mines and Geology
Paul Thenhaus, EQCAT
Seth Wittke, Wyoming State Geological Survey
Ivan Wong, URS
Yuehua Zeng, USGS