Electronic Supplement to
Semiannual Earthquake Periodicity

by Patrick H. McClellan

Table S17. Solar Semiannual (Ssa) Phase of M ≥ 7.6 Earthquakes in the Japan Archipelago from 1 January 1900 to 1 April 2014

Date	Time, UTC (hh:mm:ss.sss)	Latitude (°)	Longitude (°)	Magnitude*	Phase†	Region‡
11 March 2011	05:46:24.120	38.30	142.37	9.0	−0.054	N
2 March 1933	17:31:00.000	39.22	144.62	8.4	−0.102	N
25 September 2003	19:50:08.000	41.86	143.87	8.3	0.013	N
16 May 1968	00:49:00.000	40.90	143.35	8.2	0.303	N
4 March 1952	01:22:46.000	42.14	143.9	8.1	−0.092	N
5 November 1938	08:43:22.000	37.01	142.05	7.9	0.236	N
20 March 1960	17:07:33.000	39.85	143.4	7.8	0.001	N
17 June 1973	03:55:03.000	43.22	145.74	7.8	0.474	N
6 December 1978	14:02:08.000	44.56	146.59	7.8	0.41	N
28 December 1994	12:19:23.000	40.54	143.44	7.8	0.532	N
9 March 1931	03:48:56.000	40.48	142.66	7.7	−0.069	N
23 May 1938	07:18:32.000	36.46	141.76	7.7	0.338	N
12 June 1978	08:14:29.000	38.22	142.02	7.7	0.447	N
26 May 1983	02:59:59.000	40.47	139.09	7.7	0.354	N
12 July 1993	13:17:12.000	42.90	139.25	7.7	0.611	N
16 June 1964	04:01:40.000	38.44	139.23	7.6	0.47	N
15 January 1993	11:06:07.000	43.03	144.15	7.6	0.643	N
7 December 1944	04:35:41.000	33.65	136.25	8.1	0.417	S
20 December 1946	19:19:10.000	33.06	135.69	8.1	0.488	S
1 September 1923	02:58:37.000	35.41	139.08	7.9	−0.123	S
25 November 1953	17:48:53.000	34.02	141.82	7.9	0.351	S
21 January 1906	13:49:35.000	34	137	7.7	0.674	S
18 November 1941	16:46:00.000	32	132	7.7	0.311	S
26 February 1961	18:10:51.000	31.59	131.51	7.7	−0.123	S
13 March 1909	14:29:00.000	34.5	141.5	7.6	−0.043	S

* Magnitude type as given in ANSS catalog.

† Phase is the fraction of the cycle elapsed between bounding equinoxes.

‡ Events north (N) and south (S) of 36.0° N are grouped separately, as noted in case S7 text and Figure S15.

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