Forces in Earth's Crust
Earthquakes
Monitoring Earthquakes
Earthquake Safety
100
Force that acts on rock to change its shape or volume.
What is stress?
100
Shacking and trembling that results from the movement of rock beneath the earth.
What is an earthquake?
100
An instrument that measures and records details of earthquakes, such as force and duration.
What is a seismograph?
100
Southern California
Where is the highest risk for earthquakes in the US?
200
Three kinds of stress.
What are tension, compression, and shearing?
200
The location where the earthquake begins.
What is the focus?
200
The zigzag pattern used to represent earthquakes.
What is a seismogram?
200
Earthquakes violent shaking and turns loose soil into mud.
What is liquefaction?
300
The hanging wall slips down relative to the foot wall.
What is a normal fault?
300
The point on the Earth's surface located directly above the focus of an earthquake.
What is the epicenter?
300
Tiltmeter, Creep Meters, Laser-Ranging Devises, and GPS Satellites.
What are instruments that monitor faults?
300
Water displaced by the earthquake may form large waves.
What is a tsunami?
400
The hanging wall moves up relative to the foot wall.
What is a reverse fault?
400
P waves, S waves, and Surface Waves
What are the three types of seismic waves?
400
The force that opposes the motion of one surface at it moves across another surface.
What is friction?
400
A building designed to reduce the amount of energy that reaches the building during the earthquake.
What is a base-isolated building?
500
Terms geologists use to describe upwards and downward folds in rocks.
What are anticline and syncline?
500
The scale that is most often misused by reporters to measure earthquakes?
What is the Richter Scale?
500
What is earthquake detector?
500
Fasten bookshelves and cabinets to wall studs, bolt foundation to concrete foundation, secure brick chimneys with metal brackets.
Name three ways to make an earthquake-safe house.