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~5500 km

BBC. ~5500 km. rupture started at the south end of the Burma microplate and propagated north aftershocks are occuring along rupture area. Ji’s slip distribution (too low). Coseismic displacements (likely too small). Horizontal. Vertical. USGS. DigitalGlobe. 2 hours later. USGS.

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~5500 km

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  1. BBC ~5500 km

  2. rupture started at the south end of the Burma microplate and propagated north aftershocks are occuring along rupture area

  3. Ji’s slip distribution (too low)

  4. Coseismic displacements (likely too small) Horizontal Vertical

  5. USGS

  6. DigitalGlobe

  7. 2 hours later USGS

  8. DigitalGlobe

  9. DigitalGlobe

  10. P - wave first arrivals Most of Canada and USA did not receive P wave (shadow zone) first body waves (P and S) - arrived in North America ~20 minutes after quake first surface waves ~35 minutes after quake most energy is associated with waves with periods >> 10 minutes HENCE delay in getting magnitude right NEIC / USGS

  11. S wave shadow zone surface waves P wave NEIC / USGS 20 minutes

  12. Aspects of this earthquake relevant to whole-Earth geophysics length of day fluctuation due to redistribution of mass seismic wave arrivals and internal structure of the Earth (e.g. shadow zone) postseismic deformation and estimates of mantle viscosity

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