Earthquakes and Plate Boundaries

10 x 10 = 100 times.

An earthquake of a magnitude of 8 would be how many times stronger than one of a magnitude of 6?

transform boundary

The type of boundary where two plates slide past one another.

convergent subduction

The type of plate boundary that yields trenches.

hot spot

The type of tectonic event which formed the Hawaiian island chain.

primary and secondary waves

A seismogram measures the time/distances between these two waves in determining the epicenter.

divergent

A spreading center is usually associated with what type of boundary?

secondary (S) waves

Earthquake waves that are slower mostly sub-surface useful in determining the epicenter.

three

How many points of reference do EQ centers need to pinpoint the epicenter?

just right

The earth's crust is: too thick, too thin or just right?

primary (P) waves

The first, and fastest, earthquake waves which are compressional waves pushing and pulling the earth

outer core

The liquid layer of the earth where EQ waves get distorted/refracted.

Richter

The name of the scale that reveals the magnitude of an earthquake.

focus

The point below the Earth's surface at which the earthquake contact/slip occurs.

epicenter

The surface location directly overhead of the focus of an earthquake

seismometer

The tool used to measure seismic waves time and amplitude.

San Andreas Fault

The transform boundary name that is found in southern California and is responsible for frequent earthquakes.

rayleigh and love

The two types of surface waves rayleigh don't love buildings.

divergent

The type of boundary that yields rifts and ridges.

convergent (collision)

This type of boundary yields mountains like the Himalayas.

because it's stable

Why do farm animals shelter in the horse barn during earthquakes?