The phenomena where deformed blocks of tectonic plates suddenly return to their undeformed state.
What is elastic rebound?
100
The device that detects motion of the earth.
What is a seismograph?
100
A giant wave caused by an earthquake.
What is a tsunami?
100
Melted rock under the earth's surface.
What is magma
100
Dark, iron-rich magma frequently found in continental crust.
What is mafic magma?
200
The point of motion where the motion of an earthquake first occurs.
What is the focus?
200
The written record of seismic motion.
What is a seismogram?
200
Two things a person should do before an earthquake.
What are be prepared; make a plan with family to get to safety; have water, a radio, batteries, a flashlight, and food on hand; learn how to turn off gas, water, and electricity in your home.
200
Magma that has erupted to the earth's surface.
What is lava?
200
The most viscous type of mafic lava.
What is blocky lava?
300
The point on the Earth's surface directly above the first motion of the earthquake.
What is the epicenter?
300
The measurement of the strength of an earthquake.
What is magnitude?
300
A description of what to do during an earthquake.
What is stop a car away from tall buildings, tunnels, power lines, or bridges; stay away from windows, heavy furniture; stand in a doorway or crouch under a desk.
300
Two of the places volcanoes are likely to form.
What are subduction zones, mid-ocean ridges, or hotspots?
300
Volcanic eruption where mafic magma flows gently, frequently from oceanic volcanoes.
What are quiet eruptions?
400
Body waves where the ground moves back and forth.
What are S waves?
400
The scale most commonly used today to measure the strength of an earthquake.
What is the moment magnitude scale?
400
A zone of low activity along a fault.
What is a seismic gap?
400
Large formations of intruded igneous rock.
What are plutons?
400
Large pyroclastic particles less than 64mm in diameter.
What are lapili?
500
Areas on earth where the waves of a given earthquake are not felt.
What are shadow zones?
500
The amount of damage done by an earthquake.
What is the intensity?
500
Small earthquakes that precede a larger earthquake.
What are foreshocks?
500
Large plutons.
What are batholiths?
500
Large basin-shaped depression formed when a volcano explodes.