Earthquakes 1
Vibrations within the Earth produced by a rapid release of energy.
What are seismic waves?
The instrument that records seismic vibrations; and the paper (or digital) record of that movement.
What is the seismograph? and What is the seismogram?
The are the seismic waves that arrive last at a seismic station and cause the most surface damage?
What are surface waves?
These are the two types of seismic waves that travel through the Earth's interior (body waves).
What are Primary (P) and Secondary (S) waves?
The location on the Earth's surface that lies directly above the actual source of an earthquake?
What is the epicenter?
The study of earthquakes.
What is seismology?
These seismic waves arrive second at a seismic station.
What are S-waves? (also called the secondary waves)
The minimum number of seismic stations needed to locate an earthquake's epicenter?
Why do you need three seismic stations?
These seismic waves cause the most surface damage during an earthquake.
What are surface waves?
The scale used to rank earthquake intensity based on eyewitness reports of surface damage?
What is the Modified Mercalli Scale?
The seismic waves that first arrive at a seismic station?
What are P-waves? (also called Primary waves)
The two types of surface waves?
What are Love waves and Rayleigh waves?
The location of the actual source of an earthquake?
What is the focus (or hypocenter) of an earthquake?
The scale used to rank earthquake intensity (magnitude) based on the logarithmic scale? This scale accurately ranks earthquakes up to M8.
What is the Richter Scale?
Which earthquake wave cannot travel through the liquid core?
S - Secondary waves
These seismic waves travel by compressing one particle into another, then another, and another, etc. in the direction of movement.
How do P-waves travel through the Earth?
These seismic waves vibrate horizontally at right angles to the direction of wave motion. (Can also vibrate vertically at right angles to the direction of wave motion.)
What are Secondary waves? (Also called S-waves, shear waves, or transverse waves.)
Where does pressure build up before an earthquake happens?
At a fault line
The dangerous coastal phenomenon caused by a sudden release of energy on the ocean floor?
What is a tsunami?
How much greater is the energy release of a Richter scale 7 compared to a 6? ( 2 times, 10 times, 32 times)
32 times more energy