Virginia Earth Science Transmission of waves-Earthquake

Front

What is the primary factor that affects the velocity of seismic waves?

Back

The density and rigidity of the material through which the waves travel. Waves travel faster through more dense and more rigid materials.

Front

What is the Shadow Zone in relation to seismic waves?

Back

The area on Earth's surface where seismic waves from an earthquake are not detected.

Front

What type of shaking is hardest on buildings during an earthquake?

Back

Side to Side (Horizontal) shaking is the hardest on buildings.

Front

What does a Modified Mercalli Scale level of III indicate?

Back

It indicates that vibrations are felt like a passing truck.

Front

What does a Modified Mercalli Scale level of XI indicate?

Back

It indicates that few structures are standing, bridges are destroyed, and gas lines are broken.

Front

What are seismic waves?

Back

Seismic waves are waves of energy that travel through the Earth, typically as a result of an earthquake.

Front

What are the two main types of seismic waves?

Back

The two main types of seismic waves are P-waves (primary waves) and S-waves (secondary waves).

Front

What is the difference between P-waves and S-waves?

Back

P-waves are compressional waves that travel faster and can move through solids, liquids, and gases, while S-waves are shear waves that only move through solids.

Front

What is the focus of an earthquake?

Back

The focus is the point within the Earth where an earthquake originates.

Front

What is the epicenter of an earthquake?

Back

The epicenter is the point on the Earth's surface directly above the focus of an earthquake.