Earthquake Basics
The main cause of earthquakes
Tectonic Plate Movements
Three types of seismic waves that happen due to earthquakes
P (primary), S (secondary), and Surface waves
This is the name of the scale when magnitude is measured
Richter Scales
True or False: Getting under sturdy furniture during an earthquake is good safety practice.
True
The center of an earthquake
Focus
Scientific instrument used to detect seismic waves
Seismograph
This is the name of the scale when intensity is measured
Modified Mercalli Scale
This is why tectonic plates move
Convection currents in the Earth's mantle
The point directly above the center of the earthquake
Epicenter
Waves that are fastest and push and pull the surrounding crust
P (Primary) Waves
Intensity is the measurement of this
The effect and/or damage on people, structures, and environments
True or False: Buildings should flex in order to resist earthquake damage.
True
The smaller earthquakes that follow the main earthquake
Aftershocks
The most destructive seismic waves
Surface Waves
Magnitude is the measurement of this
The size of the seismic waves produced by an earthquake
Underwater earthquakes sometimes result in these
Tsunamis
Boundary where two plates slide past each other, like the San Andreas Fault
Transform Boundary
These waves move up and down as well as side to side
S (Secondary) Waves
As magnitude increases, the energy increases by this amount
32-Fold
Many earthquakes occur around the Pacific tectonic plate, also known as this
Ring of Fire