Instruments
This instrument simply detects earth waves
What is a seismoscope?
The horizontal direction of a fault is its ______.
What is strike?
Earthquakes are most common ______.
What is near the edges of tectonic plates?
Rayleigh waves and Love waves are both examples of these.
What are surface waves?
This is the scale most people think of when they hear "earthquake magnitude"
What is the Richter Scale?
This instrument both detects and records earth waves.
What is a seismograph?
This is the vertical direction of a fault
What is dip?
Most faults in the United States are found in these.
What are coastal mountain ranges?
These waves travel only on Earth's surface.
What are surface waves?
This scale measures the energy released by an earthquake.
What is the moment magnitude scale?
This is not an instrument that detects or records earthquakes (from the options: seismoscope, seismograph, seismometer, seismotracker).
What is seismotracker?
The property that allows a material to change shape without breaking under stress.
What is ductility?
This does not directly cause earthquakes (slipping of a fault, eruption of a volcano, landslide).
What is eruption of a volcano?
These waves travel through Earth, including the core.
What are P waves?
A 7.0 quake has about this much more energy than a 6.0 quake.
What is roughly 32 times more energy?
Secondary, smaller earthquakes after a major one are called these.
What are aftershocks?
This is an example of tension (rock layers pulling apart).
What is a normal fault?
Subduction most likely occurs at this type of boundary.
What is a convergent boundary?
These are not used to locate an earthquake (overthrust, seismic wave, focus).
What is overthrust?
This older scale measures damage and is not based purely on energy.
What is the Modified Mercalli Intensity scale?
This term describes an ocean wave caused by an earthquake.
What is a tsunami?
A locked fault must be this type of fault to build up stress.
What is a dip-slip fault?
Earthquakes are not most common here (center of plates, poles, river valleys).
What is the center of continental plates?
These waves cause side-to-side motion and cannot travel through liquids.
What are S waves?
This does not belong with the others as an earthquake magnitude scale (Modified Mercalli, moment magnitude, Richter).
What is Modified Mercalli Intensity scale?