The force of tension at a divergent plate boundary causes what fault?
What is a normal fault.
100
The most famous earthquake in the history of the United States.
What is the Great San Francisco Earthquake in 1906.
100
Before an earthquake, what are some ways to stay protected?
What is to move away from heavy objects that can fall.
100
The point where this energy release first occurs.
What is the focus.
100
Cause Particles in rocks to move at right angles to the direction of the waves.
What is a Secondary Wave.
200
The rocks above the fault surface are forced up and over the rocks below the fault surface.
What is a reverse fault.
200
Known as the Great KantÅ earthquake, it started fires and caused tsunamis which flooded towns and cities. Over 150,000 lives were lost.
What is Japan's Great Earthquake in 1923.
200
The point on Earth's surface directly above the earthquake focus.
What is the earthquake epicenter.
200
Most destruction in an earthquake is cause by what wave?
What is a surface wave.
300
At transform fault boundaries, what faults are found?
What is a strike-slip fault.
300
This was one of the two largest earthquakes, in terms of seismic moment, in a century. The Pacific and the South American tectonic plates together caused a fault slip
What is Chile Earthquake of 1960.
300
The height of the lines traced on the paper of a seismograph is a measure of the energy that is released.
What is magnitude.
300
Cause particles in rocks to move back and forth in the same direction as the waves.
What is a Primary Wave.
400
When rocks break, they move along surfaces called?
What is a fault.
400
The magnitude-8.9 offshore quake unleashed a 23-foot tsunami and was followed by more than 50 aftershocks for hours, many of them of more than magnitude 6.0.
What is the Japan Earthquake of 2011.
400
This occurs when wet soil acts more like a liquid during an earthquake.
What is liquefication.
400
Scientists can locate an earthquake's epicenter by measuring what wave?
What is a Seismic Wave.
500
faults are caused by what?
What is breaking of the rocks.
500
7.0 Magnitude Quake struck near Port au Prince.
What is the Haiti Earthquake of 2010.
500
Ocean waves caused by earthquakes.
What is a tsunami.
500
An instrument is used to record seismic waves from earthquakes.