Earthquakes and Tsunami Flashcard

Front

What can earthquakes under the water cause?

Back

Tsunamis

Front

What is the focus of an earthquake?

Back

The point (below Earth's surface) where rock breaks.

Front

True or False: Earthquakes happen every day, and most are too small for humans to notice.

Back

True

Front

At about what time do S-waves typically hit after an earthquake?

Back

45 seconds

Front

What is a massive ocean wave caused by an earthquake called?

Back

Tsunami

Front

What is the difference between P waves and S waves?

Back

P waves are primary waves that travel faster and can move through solids and liquids, while S waves are secondary waves that only move through solids.

Front

What is a fault in the context of earthquakes?

Back

A fault is a fracture or zone of fractures between two blocks of rock.

Front

What is the Richter scale used for?

Back

The Richter scale measures the magnitude of an earthquake.

Front

What is a seismic station?

Back

A seismic station is a location equipped with instruments to detect and record seismic waves.

Front

What is the difference between an earthquake's epicenter and its focus?

Back

The epicenter is the point on the Earth's surface directly above the focus, which is the point where the earthquake originates.