Exam #7 Review: Unit 4B Geologic Hazards

Front

What is the difference in P & S wave arrival time for a distance of 5600 km from the earthquake epicenter?

Back

7 minutes 15 seconds

Front

What do P Waves travel through?

Back

Both solids and liquids

Front

What is the area above ground where the earthquake starts called?

Back

Epicenter

Front

If P-Waves arrive at 08:55:50 and S-Waves at 09:03:40, what is the distance to the epicenter?

Back

6100 km

Front

If a P-Wave arrives at 1:02:20 and an S-Wave at 1:06:40, what is the distance to the epicenter?

Back

2800 km

Front

What are seismic waves?

Back

Waves of energy caused by the sudden breaking of rock within the earth or an explosion.

Front

What is the focus of an earthquake?

Back

The point within the earth where an earthquake originates.

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 seismograph?

Back

An instrument that measures and records details of earthquakes, such as force and duration.

Front

What is the Richter scale?

Back

A scale used to measure the magnitude of an earthquake.