Hi again;

Here are the duplicate hits. The last number in the first line is the distance
in degrees to the second quake.

1905, 3, 21, 1905, 3, 18, 23, 56, .00, -10.000, 168.000, 7.2, 0 60.9
1905, 3, 21, 1905, 3, 22, 3, 38, .00, 50.000, 180.000, 7.0, 0

1910, 11, 17, 1910, 11, 14, 7, 34, 31.00, 24.500, 122.000, 7.0, 0 137.9
1910, 11, 17, 1910, 11, 15, 14, 21, 48.00, -58.000, -22.000, 7.2, 60

1917, 9, 1, 1917, 8, 30, 4, 7, 15.00, -7.500, 128.000, 7.3, 100 157.8
1917, 9, 1, 1917, 8, 31, 11, 36, 24.00, 4.000, -74.000, 7.1, 0

1919, 4, 30, 1919, 4, 30, 7, 17, 12.50, -19.823, -172.215, 8.2, 35 72.5
1919, 4, 30, 1919, 5, 3, 0, 52, 6.68, 41.007, 145.233, 7.3, 35

1924, 12, 26, 1924, 12, 27, 11, 21, 53.63, 44.159, 146.370, 7.0, 35 0.78
1924, 12, 26, 1924, 12, 28, 22, 55, 4.84, 43.397, 146.579, 7.0, 35

1929, 7, 6, 1929, 7, 5, 14, 19, 8.66, 51.424, -178.136, 7.0, 35 0.16
1929, 7, 6, 1929, 7, 7, 21, 23, 16.52, 51.347, -177.910, 7.2, 35

1941, 11, 19, 1941, 11, 18, 10, 14, 41.75, -60.757, -55.375, 7.1, 35 150.8
1941, 11, 19, 1941, 11, 18, 16, 46, .00, 32.000, 132.000, 7.7, 0

1948, 1, 26, 1948, 1, 24, 17, 46, 40.00, 10.500, 122.000, 8.1, 0 66.6
1948, 1, 26, 1948, 1, 27, 11, 58, 28.00, -20.500, -178.000, 7.0, 630

1950, 12, 9, 1950, 12, 9, 21, 38, 48.00, -23.500, -67.500, 7.7, 100 95.9
1950, 12, 9, 1950, 12, 10, 13, 23, 4.00, -28.000, -178.500, 7.2, 250

1980, 10, 23, 1980, 10, 24, 14, 53, 35.63, 18.176, -98.236, 7.2, 65 98.2
1980, 10, 23, 1980, 10, 25, 7, 0, 8.00, -22.019, 170.139, 7.1, 21

1982, 6, 21, 1982, 6, 19, 6, 21, 58.45, 13.337, -89.312, 7.3, 73 144.7
1982, 6, 21, 1982, 6, 22, 4, 18, 41.72, -7.367, 126.048, 7.5, 453

1990, 5, 24, 1990, 5, 24, 20, 0, 9.89, 5.355, 31.868, 7.1, 16 89.2
1990, 5, 24, 1990, 5, 24, 20, 9, 24.29, -7.356, 120.350, 7.1, 588

2001, 1, 9, 2001, 1, 9, 16, 49, 29.52, -14.914, 167.227, 7.0, 103 78.9
2001, 1, 9, 2001, 1, 10, 16, 2, 44.00, 56.970, -153.491, 7.0, 25

A couple of these were triples so I tossed one arbitrarily. The program reads
two at a time.

Roger