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Welcome and Thanks Goals: Solicit new information Tell you what we are up to

Welcome and Thanks Goals: Solicit new information Tell you what we are up to 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.

myra-buchanan
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Welcome and Thanks Goals: Solicit new information Tell you what we are up to

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  1. Welcome and Thanks Goals: Solicit new information Tell you what we are up to 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

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

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

  4. Starting w/ W13 Age of debris flow layer is age of underlying peat.

  5. Pallett Creek

  6. 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).

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

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