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2014 NAPA Valley EQ

2014 NAPA Valley EQ. 2014/09/22. Relocation. 68150 is earlier than NHC!. Strong motion, Single fault. Strong motion, two faults. I nSAR. Data Downsampled by: Dr. Wang from KAUST. GPS-MIT (Tom Herring). GPS (JPL). Data processed by Dr. Fu at JPL. Summary.

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2014 NAPA Valley EQ

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  1. 2014 NAPA Valley EQ 2014/09/22

  2. Relocation 68150 is earlier than NHC!

  3. Strong motion, Single fault

  4. Strong motion, two faults

  5. InSAR

  6. Data Downsampled by: Dr. Wang from KAUST

  7. GPS-MIT (Tom Herring)

  8. GPS (JPL)

  9. Data processed by Dr. Fu at JPL

  10. Summary • 1. Epicenter is relocated to about 1.0~1.5km west of the surface rupture, implying a east dipping fault, this fault geometry fits the data better than previous inversions and it is consistent with the InSAR data • 2. Seismic inversions show two asperities with the later asperity larger than the earlier one • 3. Static inversion by InSAR shows two asperities but the earlier one is bigger • 4. GPS inversion only reveals one major asperity about 7 km away from the hypocenter • 5. The large slip in the first asperity in the static inversion might corresponding to fast post-seismic slip, which is shown in the GPS time series

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