1. Welcome and Thanks Goals: 1)Solicit new information 2) Tell you what we are up to 3)Get feedback on things you like or dislike To get right to it: Segmentation vs the “inversion” Geodetic slip rates and block models Fault zones to link small faults and assign rates

8. modern 1500 A.D. 1500 B.C. 3000 B.C. Young Section Old Section BSSA: Biasi, 2002; Fumal, 2002; Scharer, 2007 Middle Section 12 meters 44 clastic layers 15 earthquakes 4 meters 44 clastic layers 14 earthquakes Composite Stratigraphic Column

9. Dated Interpolated Calendar Year (A.D.) Cumulative Thickness (cm) Cumulative Frequency Sedimentation Event Return Interval Clastic Accumulation Rate (cm/yr) 37 yr 0.6 cm/yr Young Section Earthquakes 2 cm/yr 12 yr 236 yr 0.4 cm/yr

10. Age of debris flow layer is age of underlying peat. avg Age Range # eqs# DF layersDF thicknessDF RI 6348905134320 8901191261550 119113381165147W6 133818575211625 Starting w/ W13

11. Pallett Creek

12. With a sedimentation rate of ~1 m/100 yrs, and individual clastic units representing on average 5-10 years, we can distinguish events that are likely separated by decades. Here are two earthquakes separated by just 20-30 cms, and thus likely 20-30 years (as the C-14 shows).

17. Interseismic deformation due to plate convergence Updip Deformation Sources Trench Central OR Coast