Calculate distances from the epicenter to stations
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
Related questions
Question
Calculate distances from the epicenter to stations A, B, and C in Fig. 8.45 in Text using Table 8.2
![er 8
Structural Deformation of the Earth's Crust and Earthquakes
Station C
Station B
Seismogram for
station A
25
Curves show how
20
travel times of
P and S waves
increase with
distance
15
10-
Travel time
of P wave from
earthquake to
station C
2000
4000
6000
8000
10,000
Distance from earthquake (km)
A FIGURE 8.45
Variation of the S-P time interval with distance from the epicenter. As the distance from the epicenter
increases from seismograph station X, to Xc, the S-P time interval increases. Source: From F. Press and
R. Siever, Earth, 3rd ed., © 1982 by W. H. Freeman and Co., San Francisco.
Time after start of earthquake (min}
Surface waves
|interval](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb9d27ef5-e6c1-4cc6-9ca2-ef3a6152b7a2%2F8a7f68df-19b9-447b-9828-799e0c767e26%2Fbk9lzie_processed.jpeg&w=3840&q=75)
Transcribed Image Text:er 8
Structural Deformation of the Earth's Crust and Earthquakes
Station C
Station B
Seismogram for
station A
25
Curves show how
20
travel times of
P and S waves
increase with
distance
15
10-
Travel time
of P wave from
earthquake to
station C
2000
4000
6000
8000
10,000
Distance from earthquake (km)
A FIGURE 8.45
Variation of the S-P time interval with distance from the epicenter. As the distance from the epicenter
increases from seismograph station X, to Xc, the S-P time interval increases. Source: From F. Press and
R. Siever, Earth, 3rd ed., © 1982 by W. H. Freeman and Co., San Francisco.
Time after start of earthquake (min}
Surface waves
|interval
![Table 8.2 Travel Time and Time Interval for Arrival of Seismic Waves
Distance
Time (S-P)
km 500 -
-50 sec
40
Interval
300-
30
between P
200 -
20
Travel Time
and S (S-P)
100 -
-10
Distance from
75-
8.
source, km
min
min
min
S
506
-4
2,000
4,000
6,000
8,000
10,000
11,000
4
06
7
25
3
19
6.
58
12
36
38
25-
20-2
10-
5-
9.
21
16
56
7
35
11
23
20
45
9.
22
12
57
23
56
10
59
13
39
25
18
11
39
Source: From S. Judson, M. E. Kauffman, and L. D. Leet, Physical Geology, 7th ed., © 1987 by Prentice Hall, Inc.,
Englewood Cliffs, N.J.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb9d27ef5-e6c1-4cc6-9ca2-ef3a6152b7a2%2F8a7f68df-19b9-447b-9828-799e0c767e26%2Fjohewhh_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Table 8.2 Travel Time and Time Interval for Arrival of Seismic Waves
Distance
Time (S-P)
km 500 -
-50 sec
40
Interval
300-
30
between P
200 -
20
Travel Time
and S (S-P)
100 -
-10
Distance from
75-
8.
source, km
min
min
min
S
506
-4
2,000
4,000
6,000
8,000
10,000
11,000
4
06
7
25
3
19
6.
58
12
36
38
25-
20-2
10-
5-
9.
21
16
56
7
35
11
23
20
45
9.
22
12
57
23
56
10
59
13
39
25
18
11
39
Source: From S. Judson, M. E. Kauffman, and L. D. Leet, Physical Geology, 7th ed., © 1987 by Prentice Hall, Inc.,
Englewood Cliffs, N.J.
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