Earthquakes quiz review

The point where movement occurred which triggered the earthquake is the _______ .

• dip
• epicenter
• focus
• strike

Detailed studies of what earthquake allowed researchers to develop the elastic rebound theory?.

• the 1906 San Francisco earthquake
• the 1964 Anchorage, Alaska earthquake
• the 1755 Lisbon, Portugal earthquake
• the 1985 Mexico CIty earthquake

With increasing travel time the difference in arrival times between the P and the S waves _________

• increases
• decreases
• stays constant
• none of the above

Point A, where slip initiated during the earthquake, is called the ________.

• dip
• epicenter
• focus
• scarp

Point C is called the earthquake ________.

• dip
• epicenter
• focus
• scarp

What causes the up-and-down wiggles on the seismogram shown?

• variations in air pressure
• ground vibrations
• tsunami waves
• electromagnetic pulses

Which set of waves are the P waves?

• A
• B
• C
• They are all P waves

Which of the following measures an earthquake's intensity based on the observed effects on people and structures?

• Richter scale
• Modified Mercalli scale
• the Centigrade scale
• the moment magnitude scale

Which set of waves are the S waves?

• A
• B
• C
• They are all S waves

The difference in arrival times between which pair of waves can be used to determine the distance to the epicenter?

• A and C
• A and B
• None of the above