Cascadia GPS Analysis Extension Activity: PBO “Locked and Loading”

1. Cascadia GPS Analysis Extension Activity:PBO “Locked and Loading” • Activity modeled after work by Bob Butler at University of Portland • Using scaffolding from Cascadia GPS Analysis • Analyze plate deformation in our backyard • Can update data to the day

2. “Locked and Loading” Procedure • Objective is to show a more complete picture of deformation of western margin of North American Plate • Groups work to calculate station movement in ‘bins’ • One coastal station • One urban corridor station • One east of the Cascades station • Use Cascadia GPS Analysis Grid to plot movement of 3 stations • Compare with other groups to look for patterns

3. Neah Bay Pacific Beach Tumwater Othello • Kelso Tillamook Wasco La Grande Newport Corvallis Coastal Stations Urban Corridor Stations East of the Cascades Stations PBO Locked and Loading

4. Don’t use Height - too messy Example of Time Series Plot

5. Station NEAH Neah Bay, WA GPS Time Series Plot - with trend lines

6. Neah Bay, WA GPS Data 2004 2004 2005 2005 2006 2006 2007 2007 2008 2008 2009 2009

7. 42 mm / 5.5 yr = 7.6 mm/yr 56mm / 5.5 yr = 10.2 mm/yr Neah Bay, WA GPS Data 2004 2005 2006 2007 2008 2009

8. 12.4 mm / yr Neah Bay, WA GPS Velocity

9. Tumwater, WA GPS Data 2004 2005 2006 2007 2008 2009

10. 28 mm / 5.5 yr = 5.1 mm/yr 26 mm / 5.5 yr = 4.7 mm/yr Tumwater, WA GPS Data 2004 2005 2006 2007 2008 2009

11. 7.0 mm / yr Tumwater, WA GPS Velocity

12. Othello, WA GPS Data 2005 2006 2007 2008 2009

13. 6 mm / 4.5 yr = 1.3 mm/yr 0 mm / 4.5 yr = 0.0 mm/yr Othello, WA GPS Data 2005 2006 2007 2008 2009

14. 1.3 mm / yr Othello, WA GPS Velocity

15. Urban Corridor Stations Coastal stations East of Cascades Stations

16. Neah Bay Pacific Beach Tumwater Othello Kelso Tillamook Wasco La Grande Newport Corvallis GPS velocities