Electronic Supplement to
Semiannual Earthquake Periodicity

by Patrick H. McClellan

Table S15. Solar Semiannual (Ssa) Phase of M ≥ 7.5 Mainshocks along the Kuril–Kamchatka Subduction Zone from 1 January 1900 to 1 April 2014

Date Time, UTC (hh:mm:ss.sss) Latitude (°) Longitude (°) Magnitude* Phase
4 November 1952 16:58:27.000 52.76 160.06 9.0 0.237
13 October 1963 05:17:55.000 44.76 149.8 8.6 0.108
3 February 1923 16:01:48.000 53.85 160.76 8.5 0.746
6 November 1958 22:58:09.000 44.31 148.65 8.4 0.246
4 October 1994 13:23:00.000 43.83 147.33 8.3 0.062
15 November 2006 11:14:13.000 46.58 153.27 8.3 0.295
24 May 2013 05:44:49.600 54.87 153.28 8.3 0.348
11 August 1969 21:27:37.000 43.48 147.82 8.2 0.773
4 May 1959 07:15:46.000 53.37 159.66 8.0 0.236
1 May 1915 05:00:00.000 47.5 154.5 7.9 0.217
3 December 1995 18:01:09.000 44.71 149.26 7.9 0.394
5 December 1997 11:26:56.000 54.8 162 7.8 0.406
5 July 2008 02:12:04.480 53.88 152.89 7.7 0.573
25 June 1904 21:00:30.000 52 159 7.6 0.519
31 October 1916 15:30:33.000 45.4 154 7.6 0.213
7 September 1918 17:15:43.000 46.81 150.25 7.6 0.913
23 March 1978 03:15:20.000 44.98 148.52 7.6 0.012
22 December 1991 08:43:15.000 45.59 151.04 7.6 0.497
1 August 1913 17:10:57.000 47.5 155.5 7.5 0.716
31 July 1915 01:31:24.000 54 162 7.5 0.705
8 November 1918 04:38:10.000 43.82 152.78 7.5 0.251
28 December 1927 18:20:34.000 55.66 160.04 7.5 0.529
8 June 1993 13:03:36.000 51.2 157.76 7.5 0.429

* Magnitude type as given in ANSS catalog.

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

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