The Third Planet-Fall 2017 Homework 1: Locating an Earthquake Epicenter Objectiv

Question

The Third Planet-Fall 2017 Homework 1: Locating an Earthquake Epicenter Objectives: Once you complete all the problems, you should be able to: 1. Identify P, S, and surface waves on a simple seismogram. 2. Locate the epicenter of an earthquake using seismograms and travel-times curves. 3. Identify the seismic zone where the earthquake occurred. 4. Describe how to locate an earthquake when some data is missing. Examining Seismograms The three basic types of seismic wave generated by an earthquake at its focus are P- waves, S-waves, and Surface waves. P and S-waves are body waves and travel through the interior of the earth. P-waves have the greatest velocity and reach the seismic station first. S-waves arrive at the seismic station after the P-waves. The amount of time that passes between the P-wave arrival and the S-wave arrival is important in helping seismologists determine the epicenter of the earthquake. You will be using a travel-time graph, where the vertical separation between the P and S curves is equal to the difference in the arrival times between the P-wave and S-wave. To accurately locate an earthquake epicenter, records from three seismograms are necessary.

Explanation / Answer

Calculation of epicenter in miles :

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