Geography 2152F/G Lecture 3: Geo 2152 Week 3 Lecture - Tsunamis

• School: Western University
• Department: Geography
• Course: Geography 2152F/G
• Professor: Mark Moscicki

Document Summary

Tsu(cid:374)a(cid:373)i is japa(cid:374)ese fo(cid:396) (cid:862)ha(cid:396)(cid:271)ou(cid:396) (cid:449)a(cid:448)e(cid:863): has nothing to do with the tides, earthquakes is most common to cause tsunamis. They are produced by the sudden displacement of water. Events capable of triggering tsunamis: earthquakes that cause uplift of the seafloor, volcano flank collapse, underwater volcanic eruptions, meteorites. Landslides: midterm question: why are tsunamis rare in the atlantic ocean, ea(cid:396)th(cid:395)uakes a(cid:396)e(cid:374)(cid:859)t that st(cid:396)o(cid:374)g i(cid:374) the atla(cid:374)ti(cid:272) Historic tsunamis (cid:894)do(cid:374)(cid:859)t (cid:449)o(cid:396)(cid:396)y a(cid:271)out the (cid:374)u(cid:373)(cid:271)e(cid:396)s he(cid:396)e(cid:895) 16,000: most of these are a 9. 0m; important characteristic. Stage 1: displacement of the seafloor sets waves in motion that transmit energy upward and outward, when the waves reach the surface of the water, they spread outward. This does(cid:374)(cid:859)t (cid:272)ause a(cid:374)y da(cid:373)age(cid:396) he(cid:396)e at this poi(cid:374)t. The waves move rapidly across the open ocean (they can reach speeds of over 500 km/h). The spacing of the wave crests (pulses of energy) is very large (it can be more than 100 km)