This is an aerial photograph of Port Alberni on Vancouver Island. The large water pipeline crossing the view was partly destroyed by the tsunami generated by the huge 1964 Alaska earthquake. Sand from that tsunami is present at a depth of about 20 cm in the tidal flat area on the near side of the pipeline. Another layer of tsunami sand, derived from the 1700 earthquake, is present at depths of 50 to 70 cm.
(image from Clague, J. and Bobrowsky, P, 1996, Paleoseismology and seismic hazards, southwestern British Columbia, Geological Survey of Canada Bulletin 494)