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Earth Space Midterm Ch 4 # 13-23
Terms in this set (11)
Shearing creates ____________________ faults, like the San Andreas Fault in California.
The seismic waves that travel along Earth's surface and produce the most severe ground movements are called ____________________.
A seismograph uses a _______________ to record the drum's vibrations.
The squeezing together of rocks by stress is called ____________________.
In a ____________________, the rocks on either side of the fault slip past each other sideways.
An upward fold in a rock is called a ____________________.
When an earthquake occurs, ____________________ are the first seismic waves to arrive at a given location.
With the range of data available, geologists ____________________ predict exactly where and when earthquakes will occur.
Distinguish between the focus and the epicenter of an earthquake.
The focus is the point beneath Earth's surface where rock that is under stress breaks, triggering an earthquake. The epicenter is the point on the surface directly above the earthquake's focus.
Explain how geologists use seismic waves to locate an earthquake's epicenter?
Geologists determine the distances of three seismograph stations from the epicenter. For each station, they draw a circle on a map, using the distance to the epicenter as the radius of the circle. The point where all 3 circles intersect is the epicenter.
What does a seismograph record.
A seismograph records the vibrations of the Earth.
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