Pacific Northwest Workshop
March 21-22, 2012
South Campus Center, University of Washington, Seattle
The links in the following agendas are to PDF files of participants that have granted permission to view their presentations at the PacNW workshop.
Agenda for Pacific Northwest Workshop forthe Update of the National Seismic Hazard Maps, March 21-21, 2012
Attendee List
Introduction & Overview (Frankel, Petersen)
Cascadia subduction zone (CSZ)
- Recurrence rates and magnitudes of great earthquakes on the Recurrence rates and magnitudes of great earthquakes on the CSZ
- Evidence from turbidites (submarine deposits) (Goldfinger)
- Review of turbidite evidence (Atwater)
- Evidence from onshore data (Nelson)
- Possible temporal clustering of CSZ earthquakes (Wong, LaForge)
- Approach used for Canadian national seismic hazard maps (Adams)
- Effects of trial CSZ recurrence models on the hazard maps and review of November 2010 workshop on CSZ recurrence from turbidite evidence (Frankel)
- Models for the eastern edge of rupture zones of great Cascadia earthquakes
- Review of December 2011 workshop on eastern edge of CSZ and evaluation of trial models (Frankel)
Crustal fault sources
- New findings on crustal faults (Sherrod)
- Crustal deformation determined from GPS (McCaffrey)
- Comparison of observed and predicted seismicity rates from crustal deformation (Hyndman)
- New model linking eastern WA and western WA faults (Blakely)
- Faults in western Washington (Kelsey)
- Faults in eastern Washington (Sherrod)
- Effects of including some of the proposed faults in the hazard maps (Moschetti)
- Faults in Oregon (Madin)
- Discussion of Quaternary Fault Database (Haller)
- Approach used for Canadian maps (Rogers)
Deep earthquakes
- Continuation of discussion on Cascadia subduction zone earthquakes
- New information on deep, in-slab earthquakes. How to characterize hazard from deep earthquakes south of Puget Sound area? (Petersen, Moschetti)
Ground-motion prediction equations
- Ground-motion prediction equations (GMPE's; also known as attenuation relations) used in the national seismic hazard maps (subduction-zone interface events, deep in-slab events, and crustal events)
- Subduction-zone GMPE's used in BC Hydro hazard study (Abrahamson)
- Latest results on subduction-zone GMPE's (Atkinson)
- Effects of different subduction-zone GMPE's on seismic hazard maps (Petersen)
- Plans for NGA (Next Generation Attenuation relations) for subduction-zone GMPE's (Bozorgnia)
- What have we learned about ground shaking of great subduction-zone earthquakes from the recordings of the Tohoku, Japan, and Maule, Chile, earthquakes? (Stewart, Frankel, Atkinson)
- Ground shaking from the Christchurch, New Zealand, earthquake; comparison with NGA for crustal earthquakes (Boore)
Engineering issues
- Engineering needs and concerns in the Pacific Northwest. How can hazard assessment products be improved?
- Earthquake engineering issues for the Pacific Northwest (Hooper)
- Evaluation of effects of long-duration shaking from CSZ great earthquakes on building performance (Liel)
- Design map procedures and USGS design-map products (Luco)
- Long-period ground motions, 1-10 sec period (Crouse)
- New downhole seismic array in Seattle to study liquefaction (Bodin)
March 28-29, 2006
Jackson Federal Building, downtown Seattle
(915 2nd Ave.; between 1st and 2nd Avenues and Madison and Marion Streets),
ground floor (on 1st Ave. side) auditorium (use 1st Ave. entrance)
The links in the following agenda are to PDF files of participants that have granted permission to view their presentations at the CEUS workshop.
Agenda for Pacific Northwest Workshop forthe Update of the National Seismic Hazard Maps, March 28-29, 2006
Jackson Federal Building, downtown Seattle
March 28th
8:30 A.M. meeting starts
Introduction: Overview of scientific issues: whyare we here? Weaver and Frankel
Faults in the Puget Sound region and elsewherein western Washington (new findings on the following faults:Seattle (Kelsey),Tacoma (Sherrod), Canyon River (Walsh), Little River (Nelson), Boulder Creek (Sherrod), Saddle Mountain (Hughes), Calawah (McCrory).
New Seattle fault zone model: Brocher
Magnitude estimate for 900 A.D. Seattle fault earthquake: Muller
Summary of recent high-resolution imaging results ( Seattle, Tacoma, Olympia faults): Pratt
South Whidbey Island Fault experience: Blakely, Frankel
Faults in the Portland region and elsewhere in western Oregon(new results; discussion of Portland Hills, East Bank, and Oatfield faults): Madin, Wells, Blakely
Use of GPS measurements in hazard assessment. Mapping crustal deformation: McCaffrey. Estimating long-term earthquake rates using strain rates from GPS, Mazzotti, status of GPS observations and episodic tremor and slip( Melbourne).
Cascadia subduction zone: development of recurrence rate-magnitude distribution for great earthquakes M8-9 (Nelson, Goldfinger), time-dependent recurrence models (Petersen, Frankel, Adams), location of eastern edge of subduction zone (LaForge, McCaffrey), episodic tremor/slip implications for eastern edge of locked zone ( Rogers)
March 29
8:30 A.M. second day of workshop begins
Faults in eastern Washington, including Hanford area: Rohay
Faults in eastern Oregon: Madin
Faults in southwest British Columbia:Cassidy
Intra slab earthquakes, potential for western Oregon: Wong; geometry of slab under Puget Sound: McCrory; quantifying hazard for Portland: Frankel
Ground motion attenuation relations:
Subduction zone interface and intra slab earthquakes: Atkinson, Gregor
Effect of Moho reflections and focusing on ground motions: Rogers
Crustal faults: Next Generation of Attenuation Relations (NGA): Abrahamson
Effects of NGA on national maps, Frankel
Discussion of engineering issues by representatives of the Structural Engineers Associations of Washington and Oregon (Valley, Webber)
Brief description of other products (Frankel):
Probability of earthquake occurrence
Seattle urban hazard maps, plans for Portland;
scenario ground-motion maps for earthquakes on specific faults
Summary of possible changes to national maps based on workshop, with discussion of research priorities
5 PM adjourn meeting