GEOG306 Lecture Notes - Lecture 14: Satellite Television

• School: University of Waterloo
• Department: Geography and Environmental Management
• Course: GEOG306
• Professor: Amber Silver

Document Summary

Seismic waves but: also due to other factors; 90% of all tsunami: magnitude at least 6. 0-6. 5. Landslides shallow (< 30km); vertical displacement of large area; lateral collapse; pyroclastic flows; Wave height: distance between trough and crest height is low in deep ocean (unnoticeable), it increases fast with decreasing depth (shore). Wavelength: distance between 2 analog points (crests, troughs); usual waves: cm to 100s of m. tsunami: km to 100s of km. Run-out distance: how far inland the tsunami extends. Run-up height: how far above sea-level the tsunami washes: magnitude measured as wave run-up (metres, most tsunami <20m. Tsunami stripped trees up to 520 metres (1700 ft) elevation. Strongly dependent on coastal configuration: main effect: waves; huge energy (much higher than in the case of wind waves! Secondary effects: debris acting as projectiles, erosion - foundations of structures, fires - disruption of gas and electrical lines.