1921.] Angenheister.—A Study of Pacific Earthquakes. 
225 
Table II. —Epicentral Distance, Travelling-time, and Azimuth (from Apia) 
of the Largest Earthquakes of the Tonga Deep. 
Date. 
Station. 
A 
P Wave. 
S Wave. 
S-P. 
Axin 
Calculated 
from 
Epicentre. 
Quth. 
Calculated 
from A e 
An. 
o 
Sec. 
Sec. 
Sec. 
2/1/1907 
Apia 
7-9 
107 
177 
70 
S. 25° W. 
S. 15° W. 
31/3/1907 
99 • • 
7-5 
95 
177 
82 
• • 
• • 
31/5/1907 
99 9 9 
8-0 
112 
187 
75 
S. 40° W. 
S. 25° W. 
10/4/1909 
99 9 9 
31 
49 
(79) 
(30) 
S. 47° W. 
S. 52° W. 
26/6/1913 
9 9 
27-6 
106 
188 
82 
S. 17° W. 
S. 25° W. 
6/10/1914 
99 9 9 
210 
315 
. • 
• • 
• • 
« . 
6/10/1914 
Christchurch. . 
110 
153 
285 
132 
• • 
. • 
28/10/1914 
99 8 9 
7-5 
• • 
196 
• • 
• • 
• • 
20/12/1914 
Apia 
3-2 
53 
93 
40 
S. 34° W. 
S. 32° W. 
11/10/1916 
99 9 9 
3-3 
48 
68 
20 
S. 72° W. 
S. 66° W. 
20/10/1916 
99 9 9 
2-5 
• • 
• . 
18 
. • 
• • 
1/5/1917 
9 9 9 9 
14-0 
214 
363 
149 
S. 24° W. 
S. 20° W. 
1/5/1917 
Wellington . . 
16-0 
243 
423 
180 
. . 
• • 
26/6/1917 
Apia 
2-4 
42 
58 
16 
S. 30° W. 
S. 29° W. 
16/11/1917 
99 9 9 
17-2 
240 
428 
188 
• • 
c • 
30/4/1919 
9 9 : 9 
6-2 
84 
144 
30 
S. 13° W. 
S. 20° W. 
Means .. 
• • 
S. 33-6° W. 
S. 31-6° W. 
Table ITT.—Travelling-time Curve. 
A 
P. 
S. 
P co — P oc. 
Sco — Soc. 
A 
P. 
P 1 . 
o 
Sec. 
Sec. 
Sec. 
Sec. 
o 
Sec. 
Sec. 
3 
47 
70 
- 1 
-14 
90 
796 
, , 
4 
57 
92 
- 3 
-19 
95 
• • 
a a 
5 
68 
114 
- 9 
-24 
100 
840 
1,057 
6 
78 
138 
-14 
-27 
105 
• • 
1,085 
7 
93 
165 
-14 
-27 
110 
884 
1,109 
8 
108 
193 
-14 
-25 
115 
a a 
1,130 
9 
122 
220 
-14 
-24 
120 
928 
1,147 
10 
137 
253 
-14 
-17 
125 
a • 
1,162 
11 
153 
285 
-13 
-10 
130 
973 
1,174 
12 
169 
315 
-10 
- 5 
135 
a a 
1,185 
13 
184 
341 
- 8 
- 3 
140 
1,018 
1,193 
14 
202 
366 
- 4 
- 2 
145 
a a 
1,199 
15 
217 
390 
- 2 
- 2 
150 
1,063 
1,203 
16 
230 
414 
- 2 
- 1 
155 
, , 
1,205 
17 
242 
436 
- 2 
- 1 
160 
a a 
1,206 
18 
255 
460 
- 2 
- 0 
165 
, , 
1,206 
170 
• 
• • 
1,206 
15—Science. 
