Science Advances

Supplementary Materials

This PDF file includes:

  • Sedimentology
  • Chronology
  • Sediment volume budget analysis
  • Ground motion modeling and recurrence interval estimate
  • Canyon geomorphic change analysis
  • Biology
  • fig. S1. Image, CT slice, and CT number (a bulk density proxy) for cores that contain recently emplaced graded deposits from the Kaikōura Canyon and the Hikurangi Channel and its levee and overbank regions.
  • fig. S2. Difference between the pre- and post-earthquake DEMs (color-coded with erosion in red and deposition in blue), overlaid on the shaded bathymetry (grayscale).
  • fig. S3. Localized deposition in the mid-canyon region as validation for difference analysis.
  • fig. S4. Ground motion modeling and recurrence interval estimate for canyon flushing triggered by widespread failure of the Kaikōura Canyon rim.
  • fig. S5. Mean co-registration of optically sensed images and correlation (COSI-corr) results for sediment wave movement with detailed results plotted as compass diagrams by sector.
  • fig. S6. The Kaikōura Canyon head showing the location of deep-towed imaging system (DTIS) camera transects run during TAN1701 (red lines) and TAN0616 (yellow lines), multicore deployments during TAN1701 (green filled triangles)
    and TAN0616 (yellow filled triangles), and Van Veen grab samples collected during TAN0616 (yellow filled circles).
  • table S1. Description of core facies from the Kaikōura Canyon and the Hikurangi Channel, levee, and trough.
  • table S2. Metadata for multicores collected along the Kaikōura Canyon and the Hikurangi Channel, levee, and trough.
  • table S3. Results of 234Th measurements and excess 234Th (234Thex) activities reported in the text.
  • table S4. Volume budget calculation details, with lower-bound estimates shown in parentheses.
  • References (34–38)

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