ERTH 2415 Lecture Notes - Lecture 15: Eurasian Plate, Seiche, Pacific Plate
28 Aug 2018
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Definition: harbour wave, ocean wave most often created by underwater disturbances of the seafloor, mostly triggered by major earthquakes (magnitude. Landslide-caused: gravity pulls rock and sediment masses into and. Vertical motion of rock blocks on the seafloor: underwater epicenter 250 km south of. Newfoundland: edge of the continental slope, minor direct earthquake damage. Wind-caused waves: created by friction between wind and water surface, amplitude in open ocean 1-3 m, controlling factors: The depth of water beneath a breaker is roughly 1. 3 times the wave height as measured from the still water level. Tsunami waves come at you quicker than wind. Mostly created by underwater disturbances of the seafloor. Amplitude: in open ocean < 1m, near shore 6-15 m. Period t 10-60 minutes cause amplitude: a series of waves, generally 2nd or 3rd wave is the largest. Very long wavelength l 100s km: always interacting with seafloor, ocean depth d= 5 km < l.
