Chapter 8 Study Guide Flashcards
(25 cards)
The method used to find an earthquake’s epicenter
S-P time method
The shock absorbers for seismic waves.
Base isolators
An area where few earthquakes have happened but are likely to happen in the future.
Seismic gap
The theory that a major earthquake is likely along a fault where no earthquakes have occurred recently
Gap hypothesis
When weaker earthquakes follow stronger earthquakes
Aftershocks
Most of these occur at the edges of tectonic plates
Earthquakes
This kind of deformation leads to earthquakes
Elastic deformation
The 3 types of faults that lead to earthquakes
Strike-slip
Reverse
Normal
The waves of energy produced from earthquakes that travel through the earth
Seismic waves
The epicenter on Earths surface directly above an earthquake
The focus
How is the strength of an earthquake determined?
By measuring the ground motion
The other names for s-waves
Shear
Secondary
The beginning of an earthquake
Focus
The branch of science that studies earthquakes
Seismology
The change in the shape of rock in response to stress
Deformation
The first seismic waves to arrive
P waves
The snapping back of deformed rock to its previous shape
Elastic rebound
The tracing of earthquake motion
Seismogram
What instrument records seismic waves
Seismograph
The scale used to measure earthquake strength
Richter scale
Two ways used to measure the intensity of an earthquake
Amount of damage
Degree to which people feel it
The measure of how likely an area is to experience an earthquake
Earthquake hazard level
Looked at in past earthquakes to forecast an upcoming earthquake
Seismic activity
3 technologies used to construct earthquake resistant buildings
Cross braces Flexible pipes Base isolators Mass damagers Active tendor system
