Pacific Northwest Workshop
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
