EPS C20 Lecture Notes - Lecture 16: Types Of Volcanic Eruptions, Subduction
17 Nov 2020
School
Department
Course
Professor
Document Summary
Nova documentary: the wave that shook the world . Midterm: focus on the basics of how tsunamis work & information that is relevant to public safety, like how tsunami travel and how we detect them. You won"t be asked to recall exact numbers, just approximate senses of scale. The tsunami associated with the 2004 sumatra earthquake m9. 2. One of the worst natural disasters to have occurred in recent history. Energy travels perpendicular -- east to west fault rupture. Energy dissipates a shock wave through the crust when an earthquake happens. Tsunami initiation: sea floor lifts displacing billions of gallons of water. Sea floor changes & so does water column above. Displaced water columns split, water rushes away uplifted area so tsunami wave moves at 1,00 kilometers per hour. As wave approaches land, front of waves slows down but back of wave is travelling further & then catches up with front of wave, making it large.
