Geology 15 West Valley College

Earthquake Epicenter Location Exercise

Materials Needed:

Pencil

Compass

Ruler

 

  1. Determine the S-P interval times for the three seismograms.

 

Station

P Wave Arrival

S Wave Arrival

S-P interval

Sitka, AK

 

 

 

 

Charlotte, NC

 

 

 

 

Honolulu, HI

 

 

 

 

8:11

 

8:13

 

8:15

 

8:09

 

8:07

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  1. Determine the distance to the epicenter for each seismic station using the S-P interval graph.

 

miles

 

minutes

 

 

Sitka, AK

 

miles

Charlotte, NC

 

miles

Honolulu, HI

 

miles

 

 

 

  1. Plot the locations of the three seismic stations using the following geographic coordinates on the attached map of Earth.

 

Sitka, Ak: 57 N Latitude, 135 W Longitude

Charlotte, NC: 35 N Latitude, 81 W Longitude

Honolulu, HI: 21 N Latitude, 158 W Longitude

 

  1. What is the latitude and longitude of the earthquake epicenter? ____________________

 

 

  1. What is the name of the major fault that occurs near the epicenter?_________________