EAPS 106 Exam 2 Questions Complete
With 100% Verified Answers
\Q\.What is the process that makes subduction zone earthquakes cause tsunamis?
- ANSWERS✔-Uplift of the seafloor from elastic rebound during a large subduction zone
\Q\.How tsunami and wind-blown waves differ - ANSWERS✔-Tsunami waves can have similar
heights to large wind blown waves, but carry a much larger volume of water, have a much
longer wavelength (distance from crest to crest), and travel much further inland.
\Q\.How does a tsunami wave in deep water change when it hits shallow water? - ANSWERS✔-
In deep water, long wavelengths, low wave height, and great speed (jet)
, Approaching shore, they slow which causes the back of the wave to catch up. Reduces
wavelength, but increases wave height.
\Q\.When do water waves typically break? - ANSWERS✔-When the wave height is equal to
water depth
Wave Height = Water Depth
\Q\.How do we know about past tsunamis in Japan and the West Coast? - ANSWERS✔-Tsunami
Stones in Japan
Sand deposits
\Q\.How many people have been killed by tsunamis in the past 1,000 years? - ANSWERS✔-
Several Hundred Thousands
\Q\.What might it mean if you feel shaking near the shore? - ANSWERS✔-Tsunami 20-40 min
away
\Q\.why does the sea level drop before a tsunami? - ANSWERS✔-the ocean is being dragged out
when the trough arrives before the crest.
\Q\.Why is it dangerous to return to the shore after a tsunami wave? - ANSWERS✔-Consists of
3-10 waves and 2nd or 3rd wave is largest
\Q\.Why did so many people die around the Indian ocean during 2004 tsunami? - ANSWERS✔-
1961 Chilean earthquake made tsunamis all over
\Q\.How does the DART tsunami early warning system work? - ANSWERS✔-1. Pressure sensor
on ocean floor measure water pressure
With 100% Verified Answers
\Q\.What is the process that makes subduction zone earthquakes cause tsunamis?
- ANSWERS✔-Uplift of the seafloor from elastic rebound during a large subduction zone
\Q\.How tsunami and wind-blown waves differ - ANSWERS✔-Tsunami waves can have similar
heights to large wind blown waves, but carry a much larger volume of water, have a much
longer wavelength (distance from crest to crest), and travel much further inland.
\Q\.How does a tsunami wave in deep water change when it hits shallow water? - ANSWERS✔-
In deep water, long wavelengths, low wave height, and great speed (jet)
, Approaching shore, they slow which causes the back of the wave to catch up. Reduces
wavelength, but increases wave height.
\Q\.When do water waves typically break? - ANSWERS✔-When the wave height is equal to
water depth
Wave Height = Water Depth
\Q\.How do we know about past tsunamis in Japan and the West Coast? - ANSWERS✔-Tsunami
Stones in Japan
Sand deposits
\Q\.How many people have been killed by tsunamis in the past 1,000 years? - ANSWERS✔-
Several Hundred Thousands
\Q\.What might it mean if you feel shaking near the shore? - ANSWERS✔-Tsunami 20-40 min
away
\Q\.why does the sea level drop before a tsunami? - ANSWERS✔-the ocean is being dragged out
when the trough arrives before the crest.
\Q\.Why is it dangerous to return to the shore after a tsunami wave? - ANSWERS✔-Consists of
3-10 waves and 2nd or 3rd wave is largest
\Q\.Why did so many people die around the Indian ocean during 2004 tsunami? - ANSWERS✔-
1961 Chilean earthquake made tsunamis all over
\Q\.How does the DART tsunami early warning system work? - ANSWERS✔-1. Pressure sensor
on ocean floor measure water pressure
