Class Copy

Patterns of Earthquake Depths

Procedure:

Distance
(km)
Latitude
(° N)
Depth
(km)
10 46.0 50
20 47.2 40
30 45.5 80
50 48.0 100
60 47.0 110
80 49.0 100
100 47.5 10
120 49.0 145
120 48.5 60
130 46.2 140
160 48.8 230
200 47.8 280
220 49.0 280
230 48.2 300
240 46.5 320
250 47.5 310
270 49.0 380
310 45.2 420
320 48.0 440
320 47.8 430
340 48.2 460
350 46.5 520
360 47.5 540
360 45.0 550
380 47.0 530
400 48.0 580
  1. The chart shows data of earthquake foci giving the distance from the trench, depth of the earthquake, and latitude.
  2. Graph 1: plot the earthquake's distance from the trench versus the earthquake's depth. This will give you a cross-section (side) view of the plate boundary.
    1. On the x-axis, plot the earthquake distance from the trench.
    2. On the y-axis, plot the earthquake depth. Start numbering with zero km at the top of the graph.
  3. Graph 2: plot the earthquake's distance from the trench versus the earthquake's latitude. This will give you an aerial view of the plate boundary.
    1. On the x-axis, plot the earthquake distance from the trench.
    2. On the y-axis, plot the earthquake latitude.
    3. Use three different symbols or colors when plotting the earthquakes.
      • SHALLOW earthquakes (0 to 70 km depth) - use one symbol or color.
      • MEDIUM DEPTH earthquakes (70 to 300 km) - use a different symbol or color.
      • DEEP FOCUS earthquakes (301-700 km) - use a third symbol or color.
  4. On both graphs, be sure to label each axis, specify the units used, create a descriptive title and provide a legend or key for the depth symbols or colors (if needed).
 
Name:

Patterns of Earthquake Depths


 
 

Graph 1


 
 

Graph 2