Photo of Brian Atwater describing tools and clues at Science Pub
                         Photo by D. Scott Frey
Serial Crimes of Subduction:
  Giant Earthquake & Tsunamis in
      Oregon’s Past & Future

      OMSI Science Pub
  Brian...
Origin of Earthquakes
Why is Pacific NW Unprepared?

“Risk of Earthquakes in Oregon Very Low“
   Geologist John Eliot Allen, 1983 Oregonian


  ...
~ Seismic Building Code Maps
        1976                   1994

                          %g          Zone




  (10% PE...
Oregon Earthquake Study (1998)
                     Estimated
                   Damage & Loss

                   Soil Re...
Champion: “Q9 The Earthquake Kid”
  Oregon Senator Peter Courtney




Findings: Weak Buildings & Tsunami
FOCUS: Weak Community Buildings
Emergency Facilities & Public Schools




   VA Hospital. 1971 San Fernando CA, M6.6
Earthquake Damage to Schools
2008 China
   19k students dead
2005 Pakistan
   8,000 schools
   17k students dead
2003 Alge...
Xing Fu Primary School (2008)
Yingxiu Middle School (2008)
Seismic Engineering & Construction
Weak buildings can collapse
Post-1994 seismic building codes- adequate.
Pre-1994 seismic buildings codes- inadequate. Some...
DOGAMI’s REPORT (2007)

    170 School Districts & 1,101 Schools
    2,185 School Buildings
             273 Very High Ris...
Unreinforced Masonry (URMs)




94 URMs surveyed (1933 URMs outlawed in CA)
70 Schools collapsed. 120 damaged.
1933 Long Beach, CA Magnitude 6.3
Buildings with Weak 1st-Stories
“Tilt up” buildings



              Structural drawings
              reveal seismic design
              loads not incor...
Buildings in Tsunami Zone




                                Schools
                                in
                 ...
Timeline
         2007 DOGAMI Report:
          schools & emergency
                      facilities   2009 New Grant Prog...
2009 Seismic Rehabilitation Grant Program
                   aka “Courtney Grants”

Public Grade, Middle & High Schools
Co...
Purpose of “Courtney” Grants
   Eliminate collapse-prone schools
   Improve community preparedness
   Schools & Emergency ...
Applications due Nov. 15, 2009!
2005 Seismic Risk Management Program
      Oregon University Buildings

 Ondine
Residence
Hall (1966)                    W...
Cross Bracing
Installation in Progress
Concrete Forms for Shear Wall
Steel Plate Wall
Floor-to-Floor Connections
Rebar Coupler Problem Discovered
          & Improved
Earthquake & Tsunami Preparedness
         When you feel shaking,
           “Duck, cover & hold”
                     &
 ...
1964 Alaska Tsunami, Cannon Beach
Bridge ~300 m                House ~400 m
       Impact of 1964 Alaska Tsunami

        ...
Tsunami Vertical Refuges
                                  Japan



USA




?                                Indonesia
Conceptual Design
   Cannon Beach City Hall
 Tsunami Evacuation Building




                                             ...
Build Tsunami Refuges in PNW



 Hypothetical
 Locations in
 Seaside, OR




                      Modified from D.Cox
“Portland Hotspot” (red) =
 Oregon’s fuel supply hub
“Portland Hotspot” Willamette River
“Portland Hotspot”
Surface Geology & Geology Map




        Madin & others, 2009
Liquefaction & Lateral Spreading
                         During Shaking
      Before                                     ...
Liquefaction sand boils
                 Nisqually Wildlife Refuge (2001)




Courtesy: Nisqually Earthquake Clearinghouse
Liquefaction & Lateral Spreads




                         8/07 Japan quake
“Portland Hotspot” Tank Farms
“Portland Hotspot” Marine Oil Terminals




                          Vulnerable Piers
Fuel Pipelines
Electrical Transmission
Eros
    ion




Lan
   dsli
       de
DAMAGE: 1999 Taiwan Quake




                   Slide: Leon Kempner, BPA, 11/05
DAMAGE: 1964 Alaska Quake



 timber
  piles


               ground
            displacement
Liquefaction, sliding, uplifting, anchorage, fires




                    1995 Kobe




                    Bhuj, India  ...
Liquefaction: Tanks bouyant
Fix Schools & Emergency
             Facilities
      Build Tsunami Refuges
       Reliable Fuel Supply

       Disaster P...
Questions?
OMSI Science Pub - Earthquakes and Tsunamis
OMSI Science Pub - Earthquakes and Tsunamis
OMSI Science Pub - Earthquakes and Tsunamis
OMSI Science Pub - Earthquakes and Tsunamis
OMSI Science Pub - Earthquakes and Tsunamis
OMSI Science Pub - Earthquakes and Tsunamis
OMSI Science Pub - Earthquakes and Tsunamis
OMSI Science Pub - Earthquakes and Tsunamis
OMSI Science Pub - Earthquakes and Tsunamis
OMSI Science Pub - Earthquakes and Tsunamis
OMSI Science Pub - Earthquakes and Tsunamis
OMSI Science Pub - Earthquakes and Tsunamis
OMSI Science Pub - Earthquakes and Tsunamis
OMSI Science Pub - Earthquakes and Tsunamis
OMSI Science Pub - Earthquakes and Tsunamis
OMSI Science Pub - Earthquakes and Tsunamis
OMSI Science Pub - Earthquakes and Tsunamis
OMSI Science Pub - Earthquakes and Tsunamis
OMSI Science Pub - Earthquakes and Tsunamis
OMSI Science Pub - Earthquakes and Tsunamis
OMSI Science Pub - Earthquakes and Tsunamis
OMSI Science Pub - Earthquakes and Tsunamis
OMSI Science Pub - Earthquakes and Tsunamis
OMSI Science Pub - Earthquakes and Tsunamis
OMSI Science Pub - Earthquakes and Tsunamis
OMSI Science Pub - Earthquakes and Tsunamis
OMSI Science Pub - Earthquakes and Tsunamis
OMSI Science Pub - Earthquakes and Tsunamis
Upcoming SlideShare
Loading in …5
×

OMSI Science Pub - Earthquakes and Tsunamis

1,704 views

Published on

"Serial Crimes of Subduction: Giant Earthquakes and Tsunamis in Oregon's Past and Future"

This Science Pub took place at the Mission Theater in Portland, Oregon, on Tuesday, October 20, 2009. It was presented by Brian Atwater, a U.S. Geological Survey geologist based at the University of Washington, and by Yumei Wang, a geotechnical engineer at the Oregon Department of Geology and Mineral Industries (DOGAMI).

Published in: Education, Technology
1 Comment
0 Likes
Statistics
Notes
  • I you invite to join the groups Slideshare (If not already):

    - BANQUE DE CONNAISSANCES - http://www.slideshare.net/group/bank-of-knowledge

    - SOUND and MUSIC, the best (Number one of groups Slideshare) - http://www.slideshare.net/group/sound-and-music-the-best-slideshows

    - YOUTUBE,SLIDECAST & VIDEO - http://www.slideshare.net/group/you-tube-slidecast
    - GREAT CAUSES and JUST CAUSES - http://www.slideshare.net/group/great-causes-and-just-causes

    - FOR A BETTER WORLD - http://www.slideshare.net/group/for-a-better-world

    Thank for sharing. Good weekend. :-)) Bernard
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
  • Be the first to like this

No Downloads
Views
Total views
1,704
On SlideShare
0
From Embeds
0
Number of Embeds
6
Actions
Shares
0
Downloads
31
Comments
1
Likes
0
Embeds 0
No embeds

No notes for slide

OMSI Science Pub - Earthquakes and Tsunamis

  1. 1. Photo of Brian Atwater describing tools and clues at Science Pub Photo by D. Scott Frey
  2. 2. Serial Crimes of Subduction: Giant Earthquake & Tsunamis in Oregon’s Past & Future OMSI Science Pub Brian Atwater & Yumei Wang U.S.G.S. & OR Dept of Geology (DOGAMI) October 20, 2009
  3. 3. Origin of Earthquakes
  4. 4. Why is Pacific NW Unprepared? “Risk of Earthquakes in Oregon Very Low“ Geologist John Eliot Allen, 1983 Oregonian ”Recent” Seismic Info Decades of Inadequate Oregon Building Codes
  5. 5. ~ Seismic Building Code Maps 1976 1994 %g Zone (10% PE in 50 yrs) (Algermissen & Perkins)
  6. 6. Oregon Earthquake Study (1998) Estimated Damage & Loss Soil Response Earthquake Shaking Geography Layer
  7. 7. Champion: “Q9 The Earthquake Kid” Oregon Senator Peter Courtney Findings: Weak Buildings & Tsunami
  8. 8. FOCUS: Weak Community Buildings Emergency Facilities & Public Schools VA Hospital. 1971 San Fernando CA, M6.6
  9. 9. Earthquake Damage to Schools 2008 China 19k students dead 2005 Pakistan 8,000 schools 17k students dead 2003 Algeria 130 schools 1988 Armenia >1,000 students dead 1964 Alaska magnitude 9.2 quake School pulled apart by landslide
  10. 10. Xing Fu Primary School (2008)
  11. 11. Yingxiu Middle School (2008)
  12. 12. Seismic Engineering & Construction
  13. 13. Weak buildings can collapse Post-1994 seismic building codes- adequate. Pre-1994 seismic buildings codes- inadequate. Some older buildings are dangerous 2001 Oregon laws require seismic safety in schools & emergency facilities Require strengthening of existing collapse-prone buildings
  14. 14. DOGAMI’s REPORT (2007) 170 School Districts & 1,101 Schools 2,185 School Buildings 273 Very High Risk 745 High Risk 501 Moderate Risk 666 Low Risk 1,198 were built before 1950 Risk Scores for Schools & Emergency Service Buildings (2007 DOGAMI report) www.oregongeology.org/sub/projects/rvs/default.htm
  15. 15. Unreinforced Masonry (URMs) 94 URMs surveyed (1933 URMs outlawed in CA)
  16. 16. 70 Schools collapsed. 120 damaged. 1933 Long Beach, CA Magnitude 6.3
  17. 17. Buildings with Weak 1st-Stories
  18. 18. “Tilt up” buildings Structural drawings reveal seismic design loads not incorporated
  19. 19. Buildings in Tsunami Zone Schools in Tsunami zone Inundation in yellow areas
  20. 20. Timeline 2007 DOGAMI Report: schools & emergency facilities 2009 New Grant Program 2032 Schools Fixed 2002 Ballot 2022 Emergency Measures Facilities Fixed 2001 Safety Laws
  21. 21. 2009 Seismic Rehabilitation Grant Program aka “Courtney Grants” Public Grade, Middle & High Schools Community Colleges & Public Universities Fire & Police Stations, & Hospitals 2009-11 Legislature: $30 million state bonds $15 M Public Schools & $15 M Fire, Police, & Hospitals ($1.2 B authorized by voters) VIDEO: www.oregongeology.org/sub/earthquakes/
  22. 22. Purpose of “Courtney” Grants Eliminate collapse-prone schools Improve community preparedness Schools & Emergency Facilities may augment state grant funds for additional upgrades 2009 Grant Program www.oregon.gov/OMD/OEM/ Quake Safe Schools (Risk Scores) www.ode.state.or.us/go/quakesafeschools/
  23. 23. Applications due Nov. 15, 2009!
  24. 24. 2005 Seismic Risk Management Program Oregon University Buildings Ondine Residence Hall (1966) Weak floor prone to collapse Portland State University
  25. 25. Cross Bracing Installation in Progress
  26. 26. Concrete Forms for Shear Wall
  27. 27. Steel Plate Wall Floor-to-Floor Connections
  28. 28. Rebar Coupler Problem Discovered & Improved
  29. 29. Earthquake & Tsunami Preparedness When you feel shaking, “Duck, cover & hold” & “Move inland & uphill” to protect from near-field tsunami But…some coastal communities require tsunami vertical refuges for Cascadia tsunamis
  30. 30. 1964 Alaska Tsunami, Cannon Beach Bridge ~300 m House ~400 m Impact of 1964 Alaska Tsunami e nt Bridge alignm Cannon Beach Elementary School House footprint Photo: Hillsboro Argus, March 30, 1964
  31. 31. Tsunami Vertical Refuges Japan USA ? Indonesia
  32. 32. Conceptual Design Cannon Beach City Hall Tsunami Evacuation Building (Ecola Architects) by Jay Raskin, Yumei Wang, Marcella M. Boyer, Javier Moncada, Kent Yu, & Harry Yeh
  33. 33. Build Tsunami Refuges in PNW Hypothetical Locations in Seaside, OR Modified from D.Cox
  34. 34. “Portland Hotspot” (red) = Oregon’s fuel supply hub
  35. 35. “Portland Hotspot” Willamette River
  36. 36. “Portland Hotspot” Surface Geology & Geology Map Madin & others, 2009
  37. 37. Liquefaction & Lateral Spreading During Shaking Before After Sand supports loads Fluid pressure rises Sand is compacted through grain-to-grain Grains float apart Sand volcanoes on contacts Sand loses strength surface & can flow downhill Water, sand ejected
  38. 38. Liquefaction sand boils Nisqually Wildlife Refuge (2001) Courtesy: Nisqually Earthquake Clearinghouse
  39. 39. Liquefaction & Lateral Spreads 8/07 Japan quake
  40. 40. “Portland Hotspot” Tank Farms
  41. 41. “Portland Hotspot” Marine Oil Terminals Vulnerable Piers
  42. 42. Fuel Pipelines
  43. 43. Electrical Transmission Eros ion Lan dsli de
  44. 44. DAMAGE: 1999 Taiwan Quake Slide: Leon Kempner, BPA, 11/05
  45. 45. DAMAGE: 1964 Alaska Quake timber piles ground displacement
  46. 46. Liquefaction, sliding, uplifting, anchorage, fires 1995 Kobe Bhuj, India 1999 Turkey
  47. 47. Liquefaction: Tanks bouyant
  48. 48. Fix Schools & Emergency Facilities Build Tsunami Refuges Reliable Fuel Supply Disaster Preparedness Requires Risk Management for Frequent (storms…) & www.oregongeology.com (DOGAMI)
  49. 49. Questions?

×