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Volume 44, 1911
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– 441 –

Appendix.

Records of Milne Seismographs, 1906–1911.
Records of the Milne Seismographs Nos. 16 and 20, taken at Christchurch and Wellington by H. F. Skey and G. Hogben.

Communicated by G. Hogben, M.A., F.G.S.

P1, first phase; P2, second phase; P3, P4, P5, large waves. Time is Greenwieh mean civil time, given in hours, minutes, and decimals of minutes; 0 or 24R. = midnight. B.P., boom period.

Records of Milne Seismograph No. 16, at the Magnetic Observatory, Christchurch, New Zealand. (Latitude, 43° 32′ S,; longitude, 172° 37′ E. Director, Henry F. Skey, B.Sc.)

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Date. Commencement Max. Max. Amplitude. Duration. Remarks.
1906. H. m. H. m. Mm. H. m.
Jan. 3 2 03·7 2 09·9 0·4 1 10
" 4 4 08·7 4 33·5 0·3 0 51
" 18 1 35·3 0 28 Thickening of line.
" 22 4 16·9 4 23·1 1·5 0 44
" 24 7 46·2 0 49 Thickening of line.
" 24 22 01·2 22 04·3 0·4 End between 22h. 09·4m. and 22h. 13·6m. while attending instrument.
" 25 1 53·9 0 16 Slight thickening.
" 30 23 00·5 Slight swelling.
" 31 ? 16 03·0 15·5 ? ? P2. Beginning and end obscured by tremors.
Feb. 1 2 30·9
2 36·1 2 39·2 2·95
2 42·3 1 09
" 2 0 21·6 0 19 Thickening of line.
" 5 4 29·1 P1.
4 33·2 4 34·3 3·45 1 15
" 8 0 20·7 0 52 Thickening of line.
" 10 9 16·3 9 29·7 0·4 0 22
" 12 6 46·2 P1.
6 49·3 6 53·4 1·5 0 52
" 14 0 40·7 0 45·9 1·0 0 26
" 16 23 28·7 P1.
23 32·8 23 38 0 1·4 0 56
" 19 2 07·2 P1.
2 12·4 2 22·7 17·0+
2 24·1 2 54
" 20 6 07·2 6 11·8 0·2 0 14
Mar. 3 ? 9 51·3 0·7 ? Beginning and end obscured by night tremors.
" 8 21 27·5 21 32·7 0·5 0 09
" 9 ? 19 32·6 5·4 ? Beginning and end obscured by night tremors.
" 10 6 40·8
6 48·1 6 51·2 5·3 ? Beginning and end obscured by night tremors.
– 442 –

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Mar. 10 16 33·6 1635·7 8·5 ? Beginning and end obscured by night tremors.
" 11 3 35·7 3 38·8 0·85 0 36
" 11 8 49·1 8 52·2 0·9 0 30
" 11 ? 21 52·4 0·5 ? Beginning and end obscured by tremors.
" 20 2 24·8 2 34·1 0·45 ? End obscured by second quake.
" 20 3 31 0 3 32·5 0·75
3 33·6 0 57
(Mean boom period, 15·4 sec. 1 mm. = 0·66″ of tilt.)
April 14 4 02·9
4 07·5 4 11·1 17·0+ 1 56 ? Origin, New Hebrides.
" 18 13 33·6 San Francisco. Subsequent tremors at 17 17·6, 18 19·7, 19 20·7.
14 01·0 14 30·0 6·7 3 21
" 19 6 15·4
6 21·6 7 10·3 7·0 4 09
" 29 6 44·9 6 47·0 0·4 0 38
May 2 13 18·1 13 24·8 1·4 0 41
" 12 8 11·5 8 13 1 0·45 0 21
" 13 12 01·3 0·55 Small and in middle of night tremors.
" 15 13 23·2 0·5
" 17 5 28·4 5 34·6 1·2 0 42
" 18 23 41·9 23 43·9 0·9 0 28
" 19 0 41·9 0 43 9 0·45 0 22
" 19 2 31·5 2 32 6 0·4 0 26
" 19 11 38·8 0·8 In middle of night tremors.
" 21 12 58·8 13 16·9 1·0 0 46 B.P., 15·1 sec
June 1 4 40·2 B.P., 15 sec.
5 01·4 5 02·9 3·5 0 43
" 2 4 29·8 4 34·0 0·5 0 56
" 2 6 28·8 0 18 Thickening of line.
" 2 14 43·2 14 48·4 0·9 ? End obscured by night tremors.
" 5 0 28 0 0 32·2 0·5 0 48
" 6 0 00·1 0 04 Very slight.
" 9 23 18·6 0 04 Very slight thickening.
" 22 ? 12 35·2 0 4 ? In middle of night tremors.
" 24 7 38·1 7 49·5 0·35 0 25
" 30 10 21·5 0 05 Thickening merely.
July 12 10 21·5 10 41·0 0·1 0 42
" 12 11 21·5 Very slight thickening.
" 17 ? 15 45 7 0·4 Beginning and end obscured by night tremors.
15 52 9 ?
" 19 8 19·6 8 24·7 0·1 0 18
" 22 7 18 7 7 25·9 0·4 0 16
" 22 8 14·1 0 05 Very slight.
" 23 6 26·2 6 41·6 0·35 0 43
" 31 11 32 5 11 39 6 0 45 0 24
Aug. 3 3 20·3 3 21 8 0 9 0 41
" 3 4 53·4 Slight swelling.
" 5 1 24·0
1 27·1 1 28·6 3·4 0 58
" 7 22 46·8 22 48·6 0 35 0 11
" 8 1 13·6 1 18·8 0·25 0 18
" 9 11 20·1 11 23·2 0·6 0 15
" 12 6 25·8 6 27·8 0·2 0 14
" 12 9 25 8 9 36·0 0·25 0 30
– 443 –

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Aug. 17 0 33·3 Valparaiso.
0 57·3 1 36·1 Subsequent tremors: 6 33 to 7 14, minute; 7 41 to 8 07, minute; 9 22 to 10 12, minute; 13 23 to 13 25 large; and minute to 14 15·2.
1 39·8
1 44·4 12·0 4 18
" 18 6 56·8
7 01·5 7 03·5 1·85 1 39
" 22 ? P1. Beginning and end obscured by continuous tremors.
19 45·6 19 48·7 5·4 ?
" 23 1 44·6 1 48·8 0·8 0 21
" 23 16 29·6 16 30·6 1·25 ? P1. Beginning and end obscured by continuous tremors.
" 26 6 16·7
6 30·7 6 34·8 3·3
6 45·2 2 23
" 30 3 03·5
3 38·7 3 46 5 1·4 1 28
Sept. 6 19 06·0 B.P., 15 sec.
19 11·2 19 11·7 2·4 0 10
" 14 13 34·8 13 53·0 0·8 ? End obscured by night tremors.
" 14 16 12·1
16 19·3 16 30·2 20·2
16 31·7
16 35·9 ? End obscured by night tremors.
" 15 2 43·2 0 03
" 16 4 24·2 4 26 8 04 0 12
" 17 8 52·8
9 02·6 9 06·2 3·2 ? End obscured by night tremors.
" 21 1 28·0
1 49·7 1 53·3 1·7 0 27
" 21 20 08·2 Minute tremor. Shock noted at 20 10·0 at Christchurch, Cheviot, and Kaikoura.
" 29 ? 14 12·7 0·8 ? Probably night tremors.
Oct. 2 0 10·2 0 13·8 0·3 0 33 B.P., 15 sec.
" 2 1 59·8
2 07·1 2 22·1 17·0+ 3 18 Subsequent tremors.
" 2 ? 12 34·0 0·85 ? Possibly night tremors.
" 2 ? 14 51·6 0·85 ? Possibly night tremors.
" 3 0 18·1 0 29·4 0·4
0 45 5 1 03
" 4 5 06·5 0 10 Thickening of line.
" 11 5 18·8 5 36·9 0·4 0 55
" 18 3 06·3 0 19 Thickening of line.
" 27 3 52·5 4 08·0 0·45 0 30
" 29 1 33·9 1 58·5 0·4 0 55
Nov. 5 23 06·2 23 34·2 0·95 1 16 B.P., 15 sec.
" 9 ? P1. Beginning and end obscured by night tremors.
15 09·6 15 11·5 2·8 ?
" 10 5 16·2 5 26·5 1·1 0 41
" 12 4 12·5 4 14·6 2·5 0 09
" 14 ? P1. Beginning and end obscured by night tremors.
17 50·2 17 57·9 5·6 ?
" 19 7 31·0
7 39·6 8 01·7 10·0
8 07·3 3 27
" 19 22 05·6 22 10·7 1·2 0 52
– 444 –

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Dec. 7 23 51·1 23 52·1 0·9 0 12 B.P., 15 sec.
" 15 3 12·2 0 29 Thickening of line.
" 17 22 09·4 22 12·6 0·76 0 59
" 18 ? P1. In middle of continuous tremors.
20 30·1 20 30·6 2·5
20 35·7 ?
" 19 0 31·6
0 36·8 0 44·5 8·5 3 18
1907
Jan. 4 5 31·9
5 43·4 6 07·0 4·5
6 12·2
6 22·6 3 55
" 7 ? P1. Beginning and end obscured by night tremors.
13 59·5 14 02·7 14·0 ?
" 8 5 42·0 6 21·3 0·5 1 36
" 14 9 54·7 9 56·8 1·0 0 37
Feb. 3 ? B.P., 15 sec. Beginning and end obscured by night tremors.
20 01·3 20 01·8 2·05 ?
" 16 21 23·4
21 29·1 21 31·7 4·5 1 32
" 27 9 19·1 Very small.
9 21·1
Mar. 13 0 46·3 1 03 B.P., 15 sec. Thickening of line merely.
" 15 5 08·4 5 10·0 0 07 Very slight.
" 18 7 34·9 0 10 Minute.
" 27 0 59·1 0 32 Minute swellings.
" 29 6 06·8 6 08.6 1·25 0 08
" 31 ? 22 13·8 In middle of night tremors.
22 17·9 2·5 ?
April 7 9 54·4 10 02·7 ? Followed by continuous tremors.
" 15 6 32·5
7 02·0 7 30·9 4·1 2 53
" 18 21 11·4
21 39·8 21 48·6 1·5 1 39
" 19 0 07·2
0 32·0 0 36·2 1·5 1 53
" 20 2 13·5 2 21·8 1·3 1 14
" 22 ? 18 10·7 0·7 ? In middle of night tremors.
" 24 23 40·9
24 02·6 24 04·7 1·1 0 58
May 4 5 58·3
6 08·7 6 18·0 2·7 ? End obscured by night tremors.
" 9 8 29·9 8 33·0 0 07 Very slight.
" 12 ?
8 04·6 8 06·1 1·1 ? Beginning and end obscured by night tremors.
" 13 ? Ditto.
21 23·5 21 26·7 1·9 ?
" 14 3 50·3 4 02·9 0·45 0 32
" 17 1 22·6 1 24·6 0·4 0 09
" 23 ? 11 21·8 0·4 ? In middle of minute night tremors.
" 27 5 08·6 End obscured by night tremors.
5 13·5 5 13·8 1·4
5 15·8 ?
" 30 ? 22 04·9 0·7 ? In middle of continuous tremors.
" 31 ? Beginning and end obscured by night tremors.
12 51·8 12 58·0 4·9 ?
June 5 3 46·2 4 23·9 0·4 1 54
– 445 –

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June 13 9 57·2 10 10·7 0·7 1 52
" 13 12 17·9 12 21·0 0·3 0 18
" 18 9 06·3 9 07·9 1·9 0 11 Felt in towns south of Timaru.
" 19 17 28·6 0 05 Very small, carrot-shaped.
" 19 19 03·8
19 30·7 19 32·2 1·9 1 34
" 27 ?
22 43·0 22 49·2 6·0± ? In middle of continuous tremors.
July 18 0 48·1 0 51·2 0·26 0 20
" 18 5 06·7 5 10·8 0·8 0 38
" 20 14 21·5 0·8 In middle of night tremors.
" 29 0 55·7 1 27·3 0·6 0 25
" 29 19 51·4 20 11·0 0·4 0 53
Aug. 4 6 39·1 6 44·8 0·3 1 10
" 5 7 02·7 7 04·7 0·3 1 10
" 13 21 54·4
22 05·7 22 06·8 2·4 1 17
" 16 3 57·7 Small, sudden.
" 18 6 17·6 6 21·7 . 0 15 Swelling.
" 19 6 09·5 6 16·8 0 21 Very small.
" 23 7 10·0 7 13·1 0 28 "
" 23 13 38·0 13 47·3 0·1 0 23
" 28 19 20·8 19 23·9 0·3 0 50
" 31 8 43·8 8 48·9 0·3 0 16
Sept. 2 16 26·3
16 54·3 16 55·7 1·5 ? After.tremors for about two hours.
" 15 5 28·3
5 32·9 5 36·6 2·2 1 30
" 24 6 00·7 0 32 Thickening of line.
" 24 16 58·6 17 03·8 1·4 0 34
" 29 5 03·8 0 08 Swelling.
Oct. 2 1 35·6 2 05·8 1·9 B.P., 15 sec.
2 07·7 1 49
" 10 ?
22 05·1 22 05·8 3·5 ? In middle of continuous tremors.
" 11 ? 14 54·0 5·9 ? In middle of night tremors.
" 17 4 15·6 4 18·1 0·2 0 19
" 17 9 00·2 9 02·3 0 4 0 08
Nov. 3 ? Beginning and end obscured by night tremors.
18 06·3 18 10·9 2·5 ?
" 8 12 37·9 12 43·1 0·4 ? Followed by continuous tremors.
" 8 21 49·3 21 59·7 0·3 0 23
" 12 7 10·0 7 14·2 0·9 1 12 Followed by continuous tremors.
" 13 3 26·7 3 34·9 0·8 1 03
" 19 4 54·6 4 59·8 0·9 0 43
5 11·7
" 19 21 49·4 22 06·5 0·45 0 45
" 21 9 04·9 9 14·8 0·45 0 49
" 21 20 48·4 21 12·2 0·6 0 49
" 25 0 29·7 0 33·8 0·3 0 36
" 26 3 05·8 3 14·0 0·8 0 46
" 27 2 06·7 2 09·8 0·35 0 08
" 28 3 41·9 3 55·3 0·2 0 27
Dec. 11 1 09·0 1 27·3 0·6 0 53
" 12 22 13·0 22 18·0 0·1 0 06
" 15 ? Beginning and end obscured by night tremors.
17 55·3 18 07·8 4·8 ?
" 18 1 41·3 1 46·5 0·15 0 09
" 23 1 36·6 0 29 Thickening of line.
– 446 –

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Dec. 30 6 45·3
7 27·8 7 35·5 1·9 2 22
1908.
Jan. 19 7 33·7 7 42·0 0·1 0 33
" 20 0 46·5 0 06 Small, carrot-shaped.
" 24 0 46·8 0 53·0 0·9 0 56
Feb. 6 1 50·4 0 37 Thickening of line.
" 6 6 00·2 0 06 Small, carrot-shaped.
" 7 2 56·5 3 00·6 0·15 0 07
" 14 1 0301 1 06·2 0·7 0 24
" 24 23 57·8
24 01·5 24 02·5 1·6 0 38
" 27 0 21·6 0 03 Minute.
" 27 9 19·6 0 44 Swellings.
" 27 12 30·4 1·4 ? In middle of continuous tremors. Maximum appears at beginning of quake.
" 29 21 49·6 21 55 8 0·4 0 12
Mar. 5 2 28·8
2 52·1 2 59·8 1·6 1 53
" 15 ? Beginning and end obscured by night tremors.
10 19·4 10 20·4 2·7 ?
" 19 3 08·1 3 11·7 0·5 0 48
" 21 4 25·8 0 38 Thickening of line preceded and followed by minute tremors.
" 23 ? Beginning and end obscured by night tremors.
11 46·6 12 06·2 2·9 ?
" 26 23 16·3
23 27·6 24 09·0 4·25
24 29·7 2 59
" 27 4 11·6 4 53·5 0·55
5 15·2 2 07
April 7 1 26·2 1 37·5 0·5 0 43 B.P., 15 4 sec.
" 10 0 03·6
0 20·0 0 31·8 1·55 1 40
" 12 9 09·1 9 14·8 0·1 0 17
" 12 19 18·4 19 36·0 0·75 0 40
" 15 6 06·1 6 17·4 0·4 0 28
" 23 0 07·0
0 09·6 0 39·9 1·85 2 05
May 5 5 28·8 6 03·8 1·0
6 05·4 1 40
" 20 8 00·9 8 24·7 0·8 ? Followed by night tremors.
" 21 7 19·1 0 15 Slight.
June 3 ? 21 25·3 1 0 ? In middle of continuous tremors.
" 18 1 39·6 1 43·7 0·25 0 14
Aug. 17 10 50·8
10 59·5 11 28·4 5·5
11 34·1 2 44
Sept. 2 9 21 15·8 0·9 ? Beginning and end obscured by night tremors.
" 14 3 32·5 3 36·7 0·4 0 19
" 21 6 55·7 7 11·8 0·9 1 44
" 22 3 11·8 3 23·7 0·35 0 30
" 26 5 27·4
5 32·0 5 34·1 4·9 1 13
Oct. 7 1 00·7 1 21·9 0·8 0 46
" 13 5 31·0 1 42 Swellings.
– 447 –

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Nov. 11 21 22·3 21 30·0 1·0 0 59 Preceded by night tremors.
" 15 2 00·8 0 21 Slight swelling.
" 22 22 52·7 22 58·4 0·25 0 21
" 27 0 38·0 0 41·1 0·3 0 24
" 30 21 24·1 21 27·2 1·9 0 28
Dec. 1 3 05·4 0 38 Swellings.
" 2 15 12·6 15 15·6 0·25 0 23
" 7 2 00·3 2 06·9 0·15 0 28
" 8 0 26·1 0 26·4 6·0 Severe shook in North Canterbury and slight in South Canterbury.
0 27·5 0 15
" 16 6 07·7 0·4 In middle of continuous tremors.
" 28 4 40·9 4 55·3 0·6 2 22 Subsequent tremor at 7 17–1. Origin, Italy.
5 00·5
5 07·8
5 20·9
5 30·0
6 07·2
6 13·4
6 17·1
6 20·2
6 24·3
1909.
Jan. 1 4 11·7 0 07 Swelling.
" 3 21 46·5
21 51·2 21 52·2 6·4 In progress while attending to instrument.
21 54·3 0 23
" 17 3 17·9 3 28·2 0·4 0 25
" 21 2 38·4 2 47·7 0·5 0 29
" 23 3 49·6 1 37 Tremors.
" 28 0 38·5 0 04 Thickening merely.
" 29 0 59·8 1 15·9 0·3 0 45
" 29 ? 13 33·4 1·5 ? In middle of night tremors.
Feb. 11 ? Beginning and end obscured by night tremors.
18 24·2 18 25·8 2·3 ?
" 22 9 26·7
9 31·3 9 37·0 3·4 1 53
" 27 ? 13 33·4 1·5 ? Beginning and end obscured by night tremors.
Mar. 8 11 45·7 B.P., 15·4 sec. End obscured by night tremors.
11 56·0 11 56·5 1·9
11 59·1 ?
" 10 7 37·4 7 38·4 0·45 0 05
" 17 23 05·2
23 32·3 23 35·9 3·3 3 56
" 22 22 05·3
22 06·4 22 07·4 17·0+ 2 16 Direction N. and S. Felt in southern towns.
" 26 1 53·8 0 06 Maximum at beginning. Amplitude very slight. Felt in Christchurch; direction N. and S.
April 10 5 33·4 B.P., 15·5 sec.
5 43·8 5 45·9 6·0
5 46·9 2 05
" 12 1 14·3
1 18·5 1 22·6 3·95 1 29
" 22 7 14·8 7 15·8 0·2 0 27
" 27 12 54·7
13 09·0 13 19·3 6·8 2 01
– 448 –

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May 2 7 06·1
7 12·3 7 15·4 1·9 1 25
" 2 15 24·4 Very slight.
" 2 18 20·3
18 25·4 18 29·6 2·5 0 57
" 11 ? 13 21·7 1·75 ? In middle of air-tremors.
" 12 0 57·2 1 19·3 0·3 0 55
" 17 8 20·2 8 31·0 0·9 1 37
" 24 7 13·4 7 17·0 0·5 0 12
" 25 4 59·7 5 27·6 1·1 1 08
" 30 ?
21 35·9 21 37·9 2·9 ? Beginning obscured by air-tremors.
June 3 18 52·7
19 24·8 19 37·7 2·2 2 52
" 8 6 09·7 6 11·8
6 39·7 0·7
6 55·2
7 13·9 ? End obscured by air-tremors.
" 9 0 51·0 0 04 Very small; maximum at beginning.
" 12 20 25·5
20 29·1 20 34·3 7·5 1 36
" 14 7 31·1 7 38·4 0·4 0 22
" 15 1 19·8 0 40 Thickening merely.
" 26 9 35·8 9 36·6 0·1 0 04
" 27 7 22·0
7 30·3 7 35·5 4·7 1 59
" 28 ? 15 29·0 0·7 ? Beginning and end obscured by air-tremors.
July 1 13 03·7 13 10·9 0·3 0 28
" 2 6 25·9 6 28·5 0·1 0 31
" 5 ? 17 55·3 3·5 ? Beginning and end obscured by air-tremors.
" 10 13 40·3 13 42·8 0·4
14 11·3 0 33
" 26 22 06·6 22 08·1 0 16 Slight thickening.
" 27 4 34·6 4 36·1 0·2 0 29
" 30 11 16·5 11 16·5 0·8 First maximum at beginning.
11 31·2 2 34 ? Origin, Mexico.
Aug. 4 6 18·3 6 20·4 0·1 0 06
" 6 5 46·0 5 49·1 0·4 0 11
" 10 6 56·1 7 01·2 0·25 0 22
" 13 12 19·7 12 21·7 0·25 0 06
" 16 7 54·6 8 17·7 0·4 0 42
" 18 0 35·4
0 46·2 0 56·4 3·9 0 29 In progress while attending to instrument.
" 29 23 59·5 1 34 Thickening of line
Sept. 3 8 11·2 8 18·4 0·35 0 19 B.P., 15·5 sec.
" 25 12 29·6 12 32·7 0·5 0 14
Oct. 3 1 28·8 2 15 Thickening.
" 4 13 53·2 14 07·0 0·9 ? End obscured by air-tremors.
" 21 0 45·5 0 55 Thickenings.
" 23 ? 21 28·9 ? Beginning obscured by air-tremors.
" 27 1 32·3 1 33·3 0·35 0 36
" 30 10 33·8 11 02·0 0·9 ? End obscured by air-tremors.
Nov. 3 6 19·0
6 23·9 6 25·4 3·25 1 16
" 10 5 55·6 0 11 Thickening of line.
" 10 6 26·4
6 35·6 6 38·2 1·4 1 57
– 449 –

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Nov. 12 10 04·4 10 05·7 1·0 0 18 Severe shock; felt in Wellington, New Zealand.
" 14 9 47·3 9 49·7 0·15 0 07
" 27 21 19·1 0 28 Slight thickening. Possibly air-tremors.
" 28 1 07·8
1 14·5 1 15·6 1·6 1 24
" 28 8 28·3 8 34·0 0·5 0 31 Preceded and followed by minute air-tremors.
Dec. 3 3 25·0 3 33·3 0·9 0 40
3 34·8
" 8 9 17·6
9 23·8 9 25·8 2·1 1 01
" 9 ? Beginning and end obscured by air-tremors.
15 50·6 15 59·1 5·75 ?
" 9 21 23·3
21 27·4 21 31·0 2·0
21 32·3 0 40 ? Origin, Ladrone Islands.
" 9 22 04·0 22 29·0 1·0 1 21 "
" 9 ? ? Origin, Ladrone Islands. Began while attending to instrument.
23 49·1 24 03·0 1·4 ?
" 22 ?
13 01·3 13 02·8 5·9 ? Preceded and followed by air-tremors.
" 23 19 30·2 19 36·4 2·3 1 03
" 23 22 32·3 22 45·1 1·0 0 58
" 28 ? 19 56·5 1·0 ? In middle of air-tremors.
1910.
Jan. 10 ? 19 27·8 0·3 9 Beginning and end obscured by air-tremors.
" 13 0 22·2 0 34·6 0·45 0 42
" 15 ? 10 58·1 0·65 ? Beginning and end obscured by air-tremors.
" 15 22 52·9 0 20 Thickening of line.
" 19 15 01·1
15 07·7 15 09·3 1·5 1 22
" 29 5 03·7 5 11·9 1·0 1 01
" 30 3 49·2
3 52·2 3 54·0 17·0+ 2 31 ? Origin, Samoa.
Feb. 3 9 57·9 10 05·8 0·75 0 27
" 3 ? Beginning and end obscured by air-tremors.
16 50·7 16 51·9 17·0+ ?
" 4 14 07·5
14 09·9 14 14·2 17·0+ ? End obscured by air-tremors.
14 52·4 14 55·5 5·0 about ? Beginning obscured by air-tremors.
" 4 17 44·2
17 48·3 17 50·9 2·75 ? End obscured by air-tremors.
" 4 ?
18 46·3 18 47·8 1·4 ? Beginning obscured by air-tremors.
" 6 2 13·7 2 15·2 0·25 0 11
" 6 4 41·5 4 45·1 0·2 0 10
" 6 7 16·2 0 21 Thickening of line
" 7 23 03·2 23 04·7 0·1 0 10
" 13 10 04·9 10 08·5 0·45 0 34
" 15 1 27·1 1 31·2 0·25 0 31
Mar. 1 11 37·8 11 44·0 0·5 1 15
– 450 –

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Mar. 29 8 48·9 0·25 Sharp and sudden. Felt at Christchurch.
8 50·4 0 15
" 30 17 01·5
17 05·6 17 10·0 17·0+ ? End obscured by air-tremors.
" 30 23 59·4 24 02·7 0·4 0 28
" 31 5 37·2 5 40·9 0·2 0 14
April 1 13 35·3 14 27·8 0·9 1 38·5
" 4 5 23·7 0 08·2 Slight thickening.
" 8 ? 16 55·2 0·9 ? P1 and duration obscured by air-tremors.
" 12 0 50·3 0 50·6 1·5 1 04·4 Preceded and followed by minute air-tremors.
" 13 5 56·6 5 58·7 0·4 0 18·5
" 16 ? 13 09·3 ? P1 and duration obscured by air-tremors.
" 18 7 34 9 0 41·0 Thickening of line.
" 20 22 28 5 22 49·0 1 14·4 Preceded by continuous air-tremors.
" 23 ? 15 52·8 1·3 ? P1 and duration obscured by air-tremors.
" 27 2 16·3 0 35 1 Thickenings.
May 1 4 44·7 4 46·3 0·25 0 11·8
" 1 ? 18 45·7 5·5 ? P1 and duration obscured by air tremors.
" 5 0 57·4 1 09·8 0·2 0 41·0
" 6 23 22·9 23 29·1 0·4 0 38·0
" 8 18 25·2 18 34·4 0·1 0 20·0
" 10 18 32·7 0 35·4 Small swellings.
" 13 2 33·6 2 36·2 0·3 0 12·8
" 15 4 42·0 4 49·5 0·15 0 26·4
" 21 22 58·3 23 07·5 0·2 0 22·5
" 22 6 48·1 7 10·6 0·4 1 11·2
" 29 8 38·4 1 26·1 Minute tremors, possibly air-tremors.
" 29 11 12·2 0 06·1 Slight swellings.
" 31 5 19·8 5 21·3 0·15 0 06·6
" 31 5 32·6 6 01·8
6 09·3
6 22·9 0·7 1 29·2
June 1 6 00·7 6 12·5 5·1 3 00·0 ? Origin, Fiji.
" 2 10 30·5 10 32·0 0·2 0 06·1
" 5 5 02 6 5 04·6 0·1 0 27·1
" 9 6 50·0 0 05·1 Minute.
" 9 8 10·5 0 02·5 "
" 13 13 08·1 13 13·2 0·3 0 39·5
" 23 10 16·6 10 20·7 0·4 0 26·9
" 24 2 58·9 0 14·3 Very slight.
" 29 10 51·5 11 03·8
11 08·7 17·0+ ? End obscured by quake following.
" 29 ? 14 28·9 4·2 ? P1 obscured by preceding quake-ended 15th. 49·5m.
July 5 10 42·1 10 46·0 1·0
10 54·4 1·1
10 59·3 0·9 1 11·0
" 7 8 26·8 8 58·7 1·0
9 14·1 0·8
9 23 3 1·1 1 57·5
" 11 20 36·0 20 39·4 1·2
20 47·3 1·5 0 53·5
" 12 21 08·0 21 12·1 7·0
21 37·7 3·5 1 47·2
– 451 –

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July 15 12 08 5 12 14 0 1·0
12 21·8 1·0
12 25·3 1·0 1 19·5
" 15 21 48 7 21 51·9 02 Swellings.
21 56·7 0·3 0 14·8 Preceded and followed by minute tremors.
" 19 19 33·5 19 39·3 0·2
19 52·2 0·2 0 22·0
" 24 15 27·7 15 38·9 2·0 0 31·9
" 29 10 38·1 11 01·3 2·5
11 14·3 2·3 1 14·3
Aug. 5 15 38·3 15 39·5 0·6 0 05·9
" 10 20 49·6 21 08·2 0·4 0 38·3
" 21 5 36·3 5 53·6 7·0
5 55·1 5·0 2 31·1
Sept 7 7 33·9 7 51·4 7·0 1 25·0
" 9 9 00·0 9 19·8 5·1
9 28·4 3·0 0 55·3
" 10 12 21·9 12 33·4 1·4 0 38·3
Oct. 7 7 05·8 7 11·0 2·4 End obscured by air-tremors.
8 26·5 1·0 0 57·0
" 7 11 54·4 12 07·9 2·2 0 53·0
" 12 8 00·2 8 06·8 1·0 0 28·6
" 18 2 42·5 2 47·7 4·0 1 10·4
" 30 7 47·5 7 53·7 2·5 0 51·7
Nov. 9 6 09·8 6 32·1 17·5 3 03·1 Reproduced.
" 10 12 28·4 12 40·4 2·0 0 30·6 Duration doubtful owing to air tremors.
" 26 4 50·4 5 04·8 10·8
" 26 5 49·2 2 0
4 01·6 2·1 End obscured by air-tremors.
6 38·9 1·5 3 27·7
Dec. 1 3 52·3 3 55·4 0·6 0 16·5
" 2 3 20·2 3 26·4 1·5 0 25·9
" 3 7 58·3 8 04·5 16·4
8 38·0 1·0 1 21·7
" 3 4 13·8 4 30·3 0·8 0 21·7
" 4 11 05·4 11 10·6 17·0
11 30·0 3·5 1 45·6
" 10 9 37·4 9 47·0 17·5
10 00·2 5·0 11 36·3
" 11 3 57·0 4 04·2 0·7 0 20·5
" 12 23 55·9 0 21·7 0·8 0 42·3
" 13 12 25·6 12 58·6 1·6 1 16·5
" 14 20 54·4 21 02·7 1·5 1 07·3
" 16 14 55·3 15 26·3 5·1
15 41·8 3·5 2 17·6
1911.
Jan. 2 22 59·7 23 05·9 14·0 1 52·7
" 3 23 46·3 0 26·6 1·4 Duration uncertain.
" 4 1 05·9 1·5 2 33·8
" 7 2 33 2 3 05·2 1·0 1 13·5
" 8 16 24·7 16 27·8 0·8 ? End obscured by air-tremors.
" 8 9 26·8 9 32·0 2·5
9 41·4 1·5 0 38·2
" 10 16 37·7 16 46·2 7·4 0 55·0
" 16 9 08·8 9 37·8 1·0 0 41·4
Feb. 7 9 42·4 9 46·5 0·8 0 12·4
– 452 –

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Feb. 7 9 59·9 10 02·0 0·6 0 10·4
" 17 10 14·6 10 29·1 0·5 0 51·7
" 17 23 23·9 23 50·8 2·0 0 47·6
" 21 23 46·0 23 49·1 0·2 0 07·0
" 25 16 12·7 16 17·1 0·8 0 01·5
Mar. 11 3 29·5 3 43·9 1·5 0 52·7
" 17 9 28·2 9 30·3 1·0 0 07·3
" 21 4 04·2 4 22·4 0·2 0 42·5
April 6 9 55·1 10 01·3 0·3 0 14·5 Duration uncertain owing to tremors.
" 7 7 33·2 7 36·5 0·2
7 41·6 0·2 0 50·7
" 8 2 16·2 2 18·4 0·5 0 09·3 Excellent record.
" 11 13 40·0 13 41·9 1·5 0 24·0 In middle of tremors.
" 13 10 14·7 10 18·3 1·1 0 19·6 Excellent record.
" 15 4 59·9 5 05·0 2·5
5 13·4 1·6 0 50·5 L.W. commence 5h. 02·5m.
" 21 2 15·5 2 20·4 1·5
2 33·0 1·0 1 17·5
" 23 12 43·3 12 50·6 2·1 0 23·8 Duration uncertain.
" 26 1 18·3 1 27·5 0·4 0 59·5
" 27 3 03·3 3 04·8 0·2 0 06·9
May 1 12 27·4 12 32·6 0 3 0 10·3
" 20 16 19·6 16 20·4 0·2 0 06·3
" 23 4 33·1 4 37·8 0·1
4 40·3 0·1 0 19·2
June 3 20 39·1 1·5 Commencement and duration un certain owing to tremors.
20 41·6 2·0
20 45·6 1·7
20 47·5 1·5
" 6 13 05·1 13 06·6 0·5
13 12·6 0·5 0 18 0
" 7 11 17·5 11 31·5 0·7
12 00·5 1·0
12 09·5 0·8
12 14·5 0·8 2 52
" 10 17 00·8 17 07·6 1·1 1 14
" 12 7 12·6 7 17·6 0·1 0 14
" 15 14 36·4 14 46 9 5·5
14 48·7 4·0
14 52 4 3·0
15 04·5 3·8 3 08
" 28 19 57·3 19 40·4 1·5 0 28·5
July 12 4 19·1 4 38·0 2·1 L.W. begin 4h. 28 2m.
4 45·0 4·5
4 49·3 9 0 3 26
" 19 9 02·2 9 05·8 1·2
9 07·3 1·0 End obscured by tremors.
Aug. 6 1 26 0 1 28·6 0·4 0 17·5
" 10 0 33·4 0 45·9 0·4 0 31
" 16 22 51·2 23 18·3 9·0 L.W. commence 22h. 59·8m.
23 21·7 6·0
23 23·7 6·0
23 27·4 6·2 4 40·5
" 19 2 21·8 2 24·8 0·3 0 13 Duration approximate.
" 21 16 38·0 16 41·6 4·0 Duration obscured by tremors.
Sept. 6 1 17·9 1 20·7 0·6 1 12
" 12 14 07·7 1·5 Beginning and end obscured by tremors.
– 453 –

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Sept. 15 12 25·2 12 25·4 0·6 End obscured by following quake.
" 15 13 44·8 13 48·8 2·0 0 11
Oct. 5 7 38·9 7 41·3 1·0
7 44·5 0·5 0 55·4 Shock felt at Hastings, Hawke's Bay, New Zealand.
Nov. 2 0 56·2 1 01·1 2·1 0 33 End uncertain.
" 16 11 45·9 11 47·9 1·7
11 49·6 1·8 0 11·3
" 30 10 29·2 10 33·2 11·5 0 27 Duration uncertain owing to tremors.
Dec. 3 11 50·3 11 52·0 4·5 0 11·7
" 13 12 01·8 12 03·2 0·9 0 01·9 Small local quake.
" 23 21 52·4 22 09·0 1·1 End uncertain owing to tremors.

Note.—Previous to 11th May, B.P. = 14·5 secs. 1 mm. = 0·49″ static tilt.

On 11th May, 1911, the new type of recording apparatus giving a time scale approximately four times as open as the old type, was installed. With this recorder the time scale is 241 mm. to the hour.

After 11th May, B.P. = 16·5 secs. 1 mm. = 0·4” static tilt.

Principal Records of Milne Seismograph No. 20, at Wellington, New Zealand. (Latitude, 41° 17′ S.; longitude, 174° 47′ E. Observer, George Hogben.)

(The instrument is placed in a special room below a house standing about 30 ft. from the edge of a rocky cliff about 50 ft. high, situated about 250 yards from the shore-line of Wellington Harbour.)

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Date. Commencement Max. Max. Amplitude. Duration. Remarks.
1906. H. m. H. m. Mm. H. m.
Jan. 10 16 16·3 0·6 0 03 B.P., 19·6 sec.
" 26 8 04·2 P1. Several previous slight shocks.
8 21·1 8 21·8 3·8
8 26·5 0 57
" 31 15 00·4
15 57 6 16 03·3 1·2 3 23
16 22·6
Feb. 1 2 29·8 B.P., 19·6 sec.
2 33·9 2 34·2 2·8 0 18
" 3 9 55·1 8·0 0 04
" 19 ? P1.
2 17·3
2 27·0 2 30·9 10·0
2 48·0 1 45
Mar. 19 19 24·9 B.P., 19·6 sec. P1.
20 04·9 20 06·9 0·6 2 35 Probably Formosa.
" 28 17 13·2 P1.
18 11·5 18 13·8 16·0
18 24·5 13 36
April 5 22 37·8 B.P., 18·7 sec. P1. Previous tremors.
22 46·3 22 48·4 1·0
22 52·8 ?
– 454 –

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April 14 ? B.P., 19·6 sec. P1.
3 59·6 P2.
4 02·3 4 05·4 7·5
4 08·1 ?
" 18 13 26·6
13 30·1
14 01·9 P4 San Francisco earthquake.
14 10·5 14 11·9 9·0 P5
14 39 7 17 03 End overlapped by beginning of next quake.
" 19 6 27·3 P1 ?
7 06·1 7 08·4 8·5 Probably S.E. Asia.
7 15·1 1 30
June 1 4 43·6 B.P., 18·6 sec. P1.
4 47·8 P2.
5 02·3 5 07·3 2·1
5 24·0 1 12
" 2 4 28·1
4 30·6 4 33·7 0·6 0 41
" 27 0 39·1 P1.
1 56·5 2 00·2 0·6
2 02·1 ?
July 15 16 01·2 B.P., 18·5 sec. P1.
16 08·8 16 10·6 1·6
16 15·4 ?
" 17 15 37·3 P1.
15 38·9 P2.
15 41·0 15 42·8 1·1
15 49 1
" 18 ? P1.
19 42·4 19 43·3 0·5 P3.
19 48·2 ?
Aug. 5 1 00·6 B.P., 18·5 sec. P1.
1 14·9 P2.
1 22·7 1 24·8 1·5
1 31·4 3 01
" 8 5 13 5 5 14·6 0·5
" 17 0 27·2 P1.
0 33·5
1 19·6 1 23·8 18·0
2 03·8 29 03 Valparaiso earthquake; evidently two or three shocks overlap.
" 18 6 03·9 P1.
6 26·3 P2.
6 58·3 7 04·7 3·0
7 08·4 ?
" 23 16 23·5 P1.
16 26·6 16 29·4 0·6 ? Calabria.
16 35·5
" 23 19 41·2 B.P., 18·5 sec. P1.
20 05·8 P2.
21 47·3 21 51·0 0·8
" 26 ? P1; obscured by tremors.
6 30 0 6 35·7 3·2
6 40·5
Sept. 7 19 08·0 B.P., 18·5 sec. P1.
19 41·7 19 54·3 1·0
" 14 13 41·3 ? Obscured by tremors.
16 12·8 P2 ?
16 27·1 16 30·9 20·0 + 7 36 B.P., 15·9 sec.
– 455 –

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Oct. 2 1 58·6 B.P., 18·5 sec. Probably Indian. Ocean.
2 04·6
2 15·1 2 19·9 13·0 2 31
" 15 ? P1.
13 27·9 ? 2·5 ? Obscured by tremors.
" 21 2 05·1 P1.
2 17·6 2 19·9 13·0 1 56
" 29 1 39·8 P1.
1 52·4 1 53·6 1·4 ? Obscured by tremors.
" 30 19 13·7
19 18·5 19 19·4 1·0
19 23·6
Nov. 6 20 06·1 B.P., 18 5 sec. P1.
20 17·2 20 20·5 2·1
20 36·9
" 14 17 22·4 P1.
17 47·2 17 50·6 7·8
18 10·6 5 25
" 19 7 27·5 P1.
7 35·2 P2.
7 48·0 7 53·1 10·5
8 05·3
8 14·3 3 13
1909.
Mar. 17 23 17·4 Or P.T. commence 23 12·8, or even 23 05·0.
23 27·2 23 30·4 6·0 1·24 about
April 10 5 40·9
5 49·9 5 51·0 5·6 2 42
May 30 21 20·1 Repeats at 23 55·1, 24 53·5, 25 19·8, 26 26·0, &c.
21 32·2 21 35·5 4·0
June 11 10 09·4
11 02·1 ?11 16·8 0·5 2 02·6 S. France.
11 40·4 0·5
Nov. 3 6 21·7 6 26·5 2·0 0 15 Tremors before and after.
Dec. 9 15 45·2
15 55·8 .15 58·6 4·5
1910.
June 1 5 30·1 B.P., 13·5 sec. P1.
5 40·2 5 43·7 7·5 1 27 S.W. Pacific, near New Hebrides.
" 16 6 34·1 1 40 Probably S.W. Pacific, about 450 miles north of New Zealand. Followed by tremors and repeats. until 5 55 on 17th June.
6 45·2 6 49·3 14·5
" 29 10 50·5 Origin, 11° S., 172° E.
11 02·8 11 06·9 12·5 2 14
" 29 14 24·8
14 27·8 14 29·5 9·0 1 38 Origin, 51° S., 173½° E.
July 29 10 43·7 P1.
10 52·3 P3.
10 57·4 10 58·0 3·0 P5.
Aug. 18 12 40·5 P1 Local.
12 41·1 1·0 P3
" 31 21 49 5 17 40 Almost continuous tremors.
Sept. 7 7 04·5 P1 } Origin, 32° S., 179° W.
7 11·7 P2
7 28·7 P3
7 34·8 7 39·4 4·0 P5
– 456 –

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Sept. 9 9 13·4 P1.
9 19·2 P3.
9 25·2 9 27·4 1·8 P5.
Oct. 18 2 33·8 P1.
2 42·3 2 44·5 2·8 P3.
2 49·5 P5.
Nov. 9 6 07·3 P1
6 11·4 P2
6 13·3 P3 Origin, 17° S., 167° E.
6 15·4 P4
6 18·6 ? 170+ P5
" 26 4 46·5 P1
4 51·2 P3 Origin, 5° S., 165° E.
4 54·8 4 56·1 17·0+ P5
Dec. 10 9 38·1 P1
9 41·7 P3 Probable origin, 2° N., 146° E.
9 44·9 9 46·5 7·0 P5
" 13 12 03·2 P1.
12 37·5 12 49·8 6·3 Probably P5 or P3.
" 16 14 56·2 P1.
15 09·0 P3.
15 25·3 15 27·5 15 3 P5.
Note.—1 mm. of amplitude = 0·70″ of tilt (static).
1911.
Jan. 2 22 53·4 B.P., 18·3 sec.
22 59·2 0 41 Distance, about 2,100 km.
23 01·4 23 04·1 12·3
" 3 2 24·7
2 59·7
3 32·0 0·5
3 48·5 0·6
4 27·3
" 3 23 51·6 P1
24 14·5 P2?
24 28·2 P3? Turkestan.
24 42·7 P4?
24 45·2 24 46·7 4·0 P5
" 9 17 43·0 17 43·5 0·6 1 02 Local. Principal shock, 2·3 sec., Rossi-Ford, V.
" 10 16 35·9 P1
16 37·1 P2 Distance, about 1,200 km.
16 38 6 0 24 P3 B.P., 20·7 sec.
16 40·8 2·2 P5
April 17 23 08 0 P1
23 10·9 P2
23 12·6 0 10 about P3 Distance, about 1,500 km.
23 13·8 23 14·4 3 0 P5
" 21 2 16·2 P1
2 17·4 2
2 19·2 0 22 about P3 Distance, about 1,150 km.
2 20·5 2 22·5 1·4 P5
May 4 14 01·4
14 04·4 0 21 Distance, about 2,100 km.
14 09·7 14 12·8 1·0
" 5 23 59·0 P1 Distance, about 8,000 km.
24 22·4 1 02 P3 B P., 19·5 sec.
24 28·9 1·5 P5
Note.—1 mm. of amplitude = 0·70″ of tilt (static).
– 457 –

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June 7 11 27·8 B.P., 18·4 sec. P1.} Origin Mexico. Times uncertain.
11 49·8 P4.
11 53·7 11 56·2 13·0 2 30 P5. Long waves.
12 03·9 P8. Probably transverse waves.
" 10 16 59·1 17 00·1 1·2
" 17 04·1 17 05·2 0·8 0 07 ? Local.
"16 14 30·2
14 32·4 3 07 Beginning obsoured by tremors.
14 47·9 14 49·3 8·0
" 21 16 33·9
16 43·6 16 44·9 2·5 0 44
July 12 4 18·6 B.P., 17·5 sec. P1.
4 49·2 4 51·3 8·0 1 08 P5.
Aug. 16 22 51·4 B.P., 17·0 sec. P1.
23 00·0 P2.
23 12·8 3 18 P3.
23 15·7 23 16·7 7 0 P4.
23 19·5 23 22·2 10·0 P5.
Oct. 5 7 36·7 7 37·5 B.P., 12·5 sec. Origin, about 200–250 miles east of Wellington.
7 39·0
"17 9 41·9 9 46·4 2 0 0 36 ? Origin, about 550 miles from Wellington.
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