Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/11

Click to flip

11 Cards in this Set

  • Front
  • Back
How is a tsunami created?
Created most often by subduction zone earthquakes. There is a vertical shift in the ocean floor that leads to an uplifted water mass which transmits throughout the ocean. Mostly in Pacific and Indian oceans.
What is a seiche?
A wave in an enclosed water body.
What is the time between the passage of crests?
Period
What is the frequency?
1/Period
What is the wavespeed?
Wavelength/Period
What is the main difference between tsunami and wind-driven waves?
The length is less than depth for wind-driven waves (they're deep-water waves). Tsunamis are shallow water waves.
Wave base =
1/2 base length
Why does the tsunami steepen as it hits the shore?
Because sea-floor depth decreases, the tsunami slows down, but the water behind it is going fast, so the water bunches up and steepens.
Wind waves on shore...
Rotate in circles
Tsunami waves...
water flows straight
Subduction of ocean plates under shallow water cause
Large uplift