Earthquakes and Plate Tectonics

An earthquake's _____ is a number that geologist assign to an earthquake based on its strength.

The point on the surface directly above the focus is called the _______.

A _____ is an instrument that records and measures seismic waves.

The ____ of an earthquake can be found hundreds of feet below the earth's surface.

Most Earthquakes form along a ____.

When P waves and S waves reach the surface, some of them become ______ ________.

The first waves to arrive during an earthquake are primary waves, or __ _______.

An _____ is the shaking and trembling that results from the movement beneath Earth's surface.

____ ____ carries the energy of an earthquake away from the focus, through earth's interior.

After P waves come secondary waves, or ___ _______.

The ____ is the area beneath Earth's surface where rocks break, triggering an earthquake.

Geologist use ___ ___ to find an earthquake's epicenter.