Earthquake Wave Detection and Triangulation

Kimberly G explains how to find the center of an earthquake using triangulation. The process involves using three earthquake stations to measure the time difference between primary and secondary waves. By drawing circles based on these measurements, the intersection point reveals the earthquake's epicenter. The video provides a detailed explanation of earthquake waves and a practical example of triangulation.

What is the primary method used to find the center of an earthquake?

• Using a single earthquake station

• Measuring the depth of the earthquake

• Observing surface damage

• Triangulation with three stations

Which type of earthquake wave arrives first?

• Tertiary waves

• Primary waves

• Secondary waves

• Surface waves

Why are primary waves called 'primary'?

• They are the most destructive

• They travel the fastest

• They are the last to arrive

• They are the weakest

How many earthquake stations are needed for triangulation?

• Three

• Two

• Four

• One

What does each earthquake station do when it detects a primary wave?

• Measures the wave's height

• Sets a timer to measure time until the secondary wave arrives

• Sends an alert to nearby areas

• Calculates the earthquake's magnitude

What is the significance of the intersection point of the circles drawn by the stations?

• It predicts future earthquakes

• It indicates the earthquake's magnitude

• It shows the earthquake's depth

• It marks the epicenter of the earthquake

What is directly beneath the epicenter?

• The focus

• The surface

• The mantle

• The core

What is the role of the third earthquake station in triangulation?

• To measure the speed of surface waves

• To resolve the ambiguity of the intersection point

• To determine the depth of the earthquake

• To confirm the magnitude of the earthquake

How does the distance from the earthquake's origin affect the timing of wave arrivals?

• Further stations receive waves sooner

• Distance does not affect wave timing

• Closer stations receive waves later

• Closer stations receive waves sooner

What is the final step in determining the earthquake's epicenter?

• Measuring the depth of the earthquake

• Drawing circles based on wave arrival times

• Calculating the earthquake's magnitude

• Observing the surface damage