Where and How of Earthquakes
The phenomena where deformed blocks of tectonic plates suddenly return to their undeformed state.
What is elastic rebound?
The device that detects motion of the earth.
What is a seismograph?
A giant wave caused by an earthquake.
What is a tsunami?
Melted rock under the earth's surface.
What is magma
The point of motion where the motion of an earthquake first occurs.
What is the focus?
The written record of seismic motion.
What is a seismogram?
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.
Magma that has erupted to the earth's surface.
What is lava?
The point on the Earth's surface directly above the first motion of the earthquake.
What is the epicenter?
The measurement of the strength of an earthquake.
What is magnitude?
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.
Two of the places volcanoes are likely to form.
What are subduction zones, mid-ocean ridges, or hotspots?
Body waves where the ground moves back and forth.
What are S waves?
The scale most commonly used today to measure the strength of an earthquake.
What is the moment magnitude scale?
The name for the area in the Pacific where there are a lot of earthquakes and volcanoes.
What is the ring of fire?
Areas on earth where the waves of a given earthquake are not felt.
What are shadow zones?
The amount of damage done by an earthquake.
What is the intensity?
Small earthquakes that are after a larger earthquake.
What are aftershocks?