09-01-2014, 12:37 PM
Japan’sk Earthquae &Tsunami
Earthquae &Tsunami[.ppt (Size: 3.59 MB / Downloads: 107)
Fires after earthquakes are often caused by broken gas pipelines
CNN reported “The quake rattled buildings and toppled cars off bridges and into waters underneath. Waves of debris flowed like lava across farmland, pushing boats, houses and trailers toward highways.”
A number of fires broke out including one at an oil refinery which was burning out of control.
Giant fireballs rise from a burning oil refinery in Ichihara, Chiba Prefecture (state) after Japan was struck by a strong earthquake off its northeastern coast Friday, March 11, 2011.
What do you know about tsunamis?
The speed of a tsunami wave in the open ocean?
15 MPH (speed of a fast distance runner)
75 MPH (speed of a car)
200 MPH (speed of Japan’s bullet train)
475 MPH (speed of a jet plane)
762 MPH (speed of sound)
Tsunami run-up
Run-up = measurement of height of water onshore observed above a reference sea level
Generally don’t get big gigantic wave
Water comes as a fast moving rise in tide that rapidly moves inland
NOT JUST ONE WAVE…multiple waves coming in about ½ hour or so apart
See tsunami wave simulator
Damage due to tsunami
Waves often full of debris (trees, cars, pieces of wood etc.)
As the wave recedes, the debris drags more stuff with it
Can recede as much as a km out to sea, leaving shoreline empty with flopping fish, boats, etc. on the bottom