First earthquake Second earthquake Difference 1st mechan. 2nd mechan. (L1+L2) N Year Mo Da Lat Long De Mag Year Mo Da Lat Long De Mag Dist DM Angle Time_Diff Dip Str Dp Str Dip Str Dp Str /Dist T-axis P-axis T-axis P-axis (2-3) 1 1976 1 1 -29.3 -177.0 48 7.3 1976 1 14 -29.7 -177.0 47 7.9 49.5 -4 5.7 13.602 75 283 15 110 71 280 19 106 1.28 2 1976 1 1 -29.3 -177.0 48 7.3 1995 7 3 -29.1 -177.2 45 7.2 28.7 1 7.4 7123.765 75 283 15 110 73 275 17 103 1.13 3 1976 1 1 -29.3 -177.0 48 7.3 1997 9 20 -28.8 -177.0 46 7.0 46.8 3 5.0 7933.612 75 283 15 110 74 286 16 105 0.62 4 1976 1 14 -29.7 -177.0 47 7.9 1976 5 5 -29.8 -177.4 42 7.1 41.4 8 10.2 111.539 71 280 19 106 75 254 12 111 1.39 5 1976 1 14 -28.7 -176.8 18 7.9 1997 9 20 -28.8 -177.0 46 7.0 38.5 9 22.4 7919.975 55 302 35 115 74 286 16 105 1.65 6 1976 3 24 -30.0 -177.5 54 7.1 1976 5 5 -29.8 -177.4 42 7.1 21.9 0 4.0 42.005 76 254 12 107 75 254 12 111 1.11 7 1976 3 24 -30.0 -177.5 54 7.1 1981 12 26 -29.9 -177.8 31 7.1 35.7 0 7.1 2103.514 76 254 12 107 71 261 18 103 0.69 8 1976 5 5 -29.8 -177.4 42 7.1 1981 12 26 -29.9 -177.8 31 7.1 32.8 0 9.7 2061.509 75 254 12 111 71 261 18 103 0.75 9 1977 4 21 -10.2 160.6 40 7.4 1988 8 10 -10.5 160.8 16 7.6 43.2 -1 27.1 4129.010 78 96 10 244 61 35 28 235 1.15 10 1977 4 21 -10.2 160.6 40 7.4 2003 1 20 -10.4 160.6 31 7.3 25.4 1 35.8 9405.180 78 96 10 244 50 146 1 55 1.50 11 1978 3 23 43.8 149.2 42 7.1 1978 3 23 44.1 149.3 28 7.6 37.3 -4 10.0 0.114 65 303 25 130 56 312 34 132 1.14 12 1978 3 23 43.8 149.2 42 7.1 1978 3 24 44.2 149.0 31 7.6 49.0 -4 3.4 1.803 65 303 25 130 63 309 27 131 0.82 13 1978 3 23 44.1 149.3 28 7.6 1978 3 24 44.2 149.0 31 7.6 24.9 0 7.2 1.689 56 312 34 132 63 309 27 131 2.33 14 1978 3 24 44.2 149.0 31 7.6 1984 3 24 44.2 148.6 31 7.2 28.9 4 10.6 2191.581 63 309 27 131 60 292 29 124 1.48 15 1978 6 12 38.0 142.1 38 7.7 2005 8 16 38.2 142.1 37 7.3 24.5 4 82.7 9926.772 56 315 33 120 61 298 3 203 2.04 16 1978 11 4 -11.2 161.8 33 7.0 1978 11 5 -10.9 162.1 40 7.1 38.9 0 12.1 0.981 53 106 22 229 58 87 26 230 0.59 17 1979 3 14 17.8 -101.4 27 7.5 1985 9 21 17.6 -101.4 21 7.6 24.7 0 14.6 2382.604 59 9 31 200 62 33 28 209 2.17 18 1980 7 8 -12.9 166.2 44 7.5 1997 4 21 -13.2 166.2 51 7.8 33.0 -1 42.5 6130.530 81 320 4 75 57 131 15 245 1.95 19 1980 7 17 -12.4 165.9 34 7.8 1982 8 5 -12.5 166.0 24 7.0 15.4 8 9.9 749.035 74 49 14 253 76 87 13 252 3.31 20 1980 10 25 -22.2 169.8 11 7.2 1980 10 25 -21.8 169.8 29 7.5 48.0 -3 11.2 0.167 69 16 19 221 67 36 23 230 0.80 21 1980 10 25 -22.2 169.8 11 7.2 2003 12 27 -22.0 169.8 23 7.3 22.5 -1 13.7 8463.376 69 16 19 221 73 43 16 231 1.40 22 1980 10 25 -22.2 169.8 11 7.2 2004 1 3 -22.4 169.7 15 7.2 30.3 0 77.0 8470.391 69 16 19 221 7 215 80 344 0.91 23 1980 10 25 -21.8 169.8 29 7.5 2003 12 27 -22.0 169.8 23 7.3 26.4 2 7.2 8463.209 67 36 23 230 73 43 16 231 1.64 24 1981 1 18 38.2 143.0 20 7.1 2003 10 31 37.9 142.7 15 7.0 43.0 0 5.9 8320.284 58 303 31 112 54 298 36 115 0.52 25 1981 10 25 18.3 -102.0 32 7.2 1985 9 19 17.9 -102.0 21 8.0 42.6 -7 10.5 1425.414 65 30 25 203 62 9 28 199 1.80 26 1982 5 7 -61.0 -20.6 10 7.0 2006 1 2 -61.1 -21.4 20 7.4 46.2 -3 84.9 8641.022 25 127 25 229 1 312 72 44 0.71 27 1982 6 19 12.6 -89.0 52 7.4 2001 1 13 13.0 -89.1 56 7.8 39.8 -3 14.3 6783.466 20 24 69 224 10 35 79 231 1.47 28 1983 3 18 -4.9 153.3 70 7.8 2000 11 16 -5.0 153.2 31 7.9 47.2 0 91.4 6452.942 68 150 0 59 60 339 30 160 1.84 29 1985 3 3 -33.9 -71.7 41 8.0 1985 4 9 -34.3 -71.9 47 7.1 40.7 9 6.4 36.132 68 61 20 266 66 74 24 263 1.77 30 1985 7 3 -4.3 152.6 31 7.3 2000 11 16 -4.6 152.8 24 8.1 39.5 -7 74.6 5615.013 77 200 9 68 33 181 29 292 2.07 31 1985 11 17 -1.6 134.7 13 7.1 2002 10 10 -1.8 134.3 15 7.6 48.9 -4 45.3 6171.049 22 138 14 42 8 284 2 15 0.87 32 1986 11 14 24.0 121.8 33 7.4 2002 3 31 24.2 122.0 39 7.2 27.5 2 56.1 5615.398 77 308 12 122 67 314 17 180 1.26 33 1987 3 5 -24.4 -70.9 42 7.6 1995 7 30 -24.2 -70.7 29 8.1 32.9 -4 7.4 3068.830 66 73 23 270 67 90 23 267 2.82 34 1988 1 19 -24.9 -70.6 31 7.0 1988 2 5 -24.9 -70.6 17 7.2 16.0 -1 4.2 17.271 62 88 28 266 62 95 28 269 1.62 35 1988 4 12 -17.5 -72.8 15 7.1 2001 6 23 -17.3 -72.7 30 8.5 35.9 -12 14.3 4819.885 56 56 34 235 60 80 29 242 3.88 36 1988 4 12 -17.5 -72.8 15 7.1 2001 7 7 -17.5 -72.4 25 7.7 43.0 -5 20.0 4833.430 56 56 34 235 55 86 33 248 1.07 37 1988 8 10 -10.5 160.8 16 7.6 2003 1 20 -10.4 160.6 31 7.3 22.4 3 56.8 5276.170 61 35 28 235 50 146 1 55 2.10 38 1990 4 18 1.3 123.3 33 7.7 1991 6 20 1.0 123.2 15 7.6 37.4 1 28.7 427.652 66 135 17 0 52 185 38 8 1.64 39 1991 11 19 4.8 -77.2 19 7.2 2004 11 15 4.7 -77.6 16 7.3 44.2 0 11.5 4744.443 58 97 32 279 55 81 34 271 0.72 40 1992 5 17 7.3 127.0 34 7.1 1992 5 17 7.3 127.2 25 7.3 26.7 -1 12.9 0.018 63 334 20 110 66 308 22 103 1.11 41 1992 5 17 7.3 127.0 34 7.1 1993 5 11 7.1 127.0 47 7.0 26.1 1 17.9 359.359 63 334 20 110 71 4 3 104 0.91 42 1992 5 17 7.3 127.2 25 7.3 1993 5 11 7.1 127.0 47 7.0 41.4 3 20.8 359.341 66 308 22 103 71 4 3 104 0.67 43 1992 6 28 34.7 -116.7 15 7.4 1999 10 16 34.7 -116.3 15 7.2 35.4 2 17.1 2665.909 9 296 20 202 11 292 3 201 0.94 44 1993 5 11 7.1 127.0 47 7.0 2001 1 1 6.7 127.1 44 7.5 38.7 -4 2.7 2791.521 71 4 3 104 69 2 4 102 0.91 45 1993 8 8 13.1 145.3 59 7.8 2001 10 12 12.9 145.1 42 7.1 36.2 8 80.7 2987.269 52 327 34 177 53 314 25 82 1.48 46 1993 8 10 -45.0 166.7 15 7.0 2003 8 21 -45.0 166.9 32 7.3 20.5 -1 23.4 3663.473 63 65 20 289 68 115 22 301 1.29 47 1994 2 12 -20.5 169.0 43 7.0 2007 3 25 -20.6 169.1 42 7.2 16.3 -1 5.2 4788.279 85 65 5 245 80 60 10 244 1.52 48 1995 5 5 12.7 125.3 18 7.1 1996 6 11 12.7 125.4 29 7.1 18.0 0 8.3 403.604 59 270 30 75 63 285 24 77 1.41 49 1995 7 3 -29.1 -177.2 45 7.2 1997 9 20 -28.8 -177.0 46 7.0 40.1 2 3.8 809.848 73 275 17 103 74 286 16 105 0.63 50 1995 7 30 -24.2 -70.7 29 8.1 1998 1 30 -24.0 -70.6 41 7.1 23.9 10 8.4 915.295 67 90 23 267 61 76 28 266 3.20 51 1999 5 16 -5.0 152.8 42 7.1 2000 11 16 -5.0 153.2 31 7.9 46.9 -7 14.2 550.286 72 337 17 167 60 339 30 160 1.26 52 2001 6 23 -17.3 -72.7 30 8.5 2001 7 7 -17.5 -72.4 25 7.7 33.8 8 8.0 13.545 60 80 29 242 55 86 33 248 4.72 53 2003 3 17 51.3 177.6 27 7.1 2003 11 17 51.1 177.9 22 7.8 29.2 -6 8.5 244.588 57 308 28 163 60 323 28 165 1.86 54 2003 12 27 -22.0 169.8 23 7.3 2004 1 3 -22.4 169.7 15 7.2 48.2 1 80.4 7.015 73 43 16 231 7 215 80 344 0.67 55 2004 2 5 -3.6 135.5 13 7.0 2004 11 26 -3.5 135.5 12 7.2 7.9 0 48.5 294.222 26 264 37 15 36 214 36 336 3.09 56 2004 9 5 32.9 137.0 16 7.3 2004 9 5 33.1 137.2 12 7.4 29.7 -1 10.1 0.202 80 321 7 180 77 270 0 1 1.30 The last column is the ratio of earthquake focal zone sizes to twice their distance (zones overlap), see equations (2-3) in Kagan and Jackson, 1999. The total number of earthquakes, with magnitude >= 7.0 is 312 First earthquake Second earthquake Difference Mechanisms (L1+L2) N Year Mo Da Lat Long De Mag Year Mo Da Lat Long De Mag Dist DM Angle Time_Diff /Dist (2-3) 1 1976 1 1 -29.3 -177.0 48 7.3 1976 1 14 -29.7 -177.0 47 7.9 49.5 -4 5.7 13.602 Thr Thr 1.28 2 1976 1 1 -29.3 -177.0 48 7.3 1995 7 3 -29.1 -177.2 45 7.2 28.7 1 7.4 7123.765 Thr Thr 1.13 3 1976 1 1 -29.3 -177.0 48 7.3 1997 9 20 -28.8 -177.0 46 7.0 46.8 3 5.0 7933.612 Thr Thr 0.62 4 1976 1 14 -29.7 -177.0 47 7.9 1976 5 5 -29.8 -177.4 42 7.1 41.4 8 10.2 111.539 Thr Thr 1.39 5 1976 1 14 -28.7 -176.8 18 7.9 1997 9 20 -28.8 -177.0 46 7.0 38.5 9 22.4 7919.975 Thr Thr 1.65 6 1976 3 24 -30.0 -177.5 54 7.1 1976 5 5 -29.8 -177.4 42 7.1 21.9 0 4.0 42.005 Thr Thr 1.11 7 1976 3 24 -30.0 -177.5 54 7.1 1981 12 26 -29.9 -177.8 31 7.1 35.7 0 7.1 2103.514 Thr Thr 0.69 8 1976 5 5 -29.8 -177.4 42 7.1 1981 12 26 -29.9 -177.8 31 7.1 32.8 0 9.7 2061.509 Thr Thr 0.75 9 1977 4 21 -10.2 160.6 40 7.4 1988 8 10 -10.5 160.8 16 7.6 43.2 -1 27.1 4129.010 Thr Thr 1.15 10 1977 4 21 -10.2 160.6 40 7.4 2003 1 20 -10.4 160.6 31 7.3 25.4 1 35.8 9405.180 Thr Thr 1.50 11 1978 3 23 43.8 149.2 42 7.1 1978 3 23 44.1 149.3 28 7.6 37.3 -4 10.0 0.114 Thr Thr 1.14 12 1978 3 23 43.8 149.2 42 7.1 1978 3 24 44.2 149.0 31 7.6 49.0 -4 3.4 1.803 Thr Thr 0.82 13 1978 3 23 44.1 149.3 28 7.6 1978 3 24 44.2 149.0 31 7.6 24.9 0 7.2 1.689 Thr Thr 2.33 14 1978 3 24 44.2 149.0 31 7.6 1984 3 24 44.2 148.6 31 7.2 28.9 4 10.6 2191.581 Thr Thr 1.48 15 1978 6 12 38.0 142.1 38 7.7 2005 8 16 38.2 142.1 37 7.3 24.5 4 82.7 9926.772 Thr Thr 2.04 16 1978 11 4 -11.2 161.8 33 7.0 1978 11 5 -10.9 162.1 40 7.1 38.9 0 12.1 0.981 Thr Thr 0.59 17 1979 3 14 17.8 -101.4 27 7.5 1985 9 21 17.6 -101.4 21 7.6 24.7 0 14.6 2382.604 Thr Thr 2.17 18 1980 7 8 -12.9 166.2 44 7.5 1997 4 21 -13.2 166.2 51 7.8 33.0 -1 42.5 6130.530 Thr Thr 1.95 19 1980 7 17 -12.4 165.9 34 7.8 1982 8 5 -12.5 166.0 24 7.0 15.4 8 9.9 749.035 Thr Thr 3.31 20 1980 10 25 -22.2 169.8 11 7.2 1980 10 25 -21.8 169.8 29 7.5 48.0 -3 11.2 0.167 Thr Thr 0.80 21 1980 10 25 -22.2 169.8 11 7.2 2003 12 27 -22.0 169.8 23 7.3 22.5 -1 13.7 8463.376 Thr Thr 1.40 22 1980 10 25 -22.2 169.8 11 7.2 2004 1 3 -22.4 169.7 15 7.2 30.3 0 77.0 8470.391 Thr Nor 0.91 23 1980 10 25 -21.8 169.8 29 7.5 2003 12 27 -22.0 169.8 23 7.3 26.4 2 7.2 8463.209 Thr Thr 1.64 24 1981 1 18 38.2 143.0 20 7.1 2003 10 31 37.9 142.7 15 7.0 43.0 0 5.9 8320.284 Thr Thr 0.52 25 1981 10 25 18.3 -102.0 32 7.2 1985 9 19 17.9 -102.0 21 8.0 42.6 -7 10.5 1425.414 Thr Thr 1.80 26 1982 5 7 -61.0 -20.6 10 7.0 2006 1 2 -61.1 -21.4 20 7.4 46.2 -3 84.9 8641.022 S-s Nor 0.71 27 1982 6 19 12.6 -89.0 52 7.4 2001 1 13 13.0 -89.1 56 7.8 39.8 -3 14.3 6783.466 Nor Nor 1.47 28 1983 3 18 -4.9 153.3 70 7.8 2000 11 16 -5.0 153.2 31 7.9 47.2 0 91.4 6452.942 Thr Thr 1.84 29 1985 3 3 -33.9 -71.7 41 8.0 1985 4 9 -34.3 -71.9 47 7.1 40.7 9 6.4 36.132 Thr Thr 1.77 30 1985 7 3 -4.3 152.6 31 7.3 2000 11 16 -4.6 152.8 24 8.1 39.5 -7 74.6 5615.013 Thr S-s 2.07 31 1985 11 17 -1.6 134.7 13 7.1 2002 10 10 -1.8 134.3 15 7.6 48.9 -4 45.3 6171.049 S-s S-s 0.87 32 1986 11 14 24.0 121.8 33 7.4 2002 3 31 24.2 122.0 39 7.2 27.5 2 56.1 5615.398 Thr Thr 1.26 33 1987 3 5 -24.4 -70.9 42 7.6 1995 7 30 -24.2 -70.7 29 8.1 32.9 -4 7.4 3068.830 Thr Thr 2.82 34 1988 1 19 -24.9 -70.6 31 7.0 1988 2 5 -24.9 -70.6 17 7.2 16.0 -1 4.2 17.271 Thr Thr 1.62 35 1988 4 12 -17.5 -72.8 15 7.1 2001 6 23 -17.3 -72.7 30 8.5 35.9 -12 14.3 4819.885 Thr Thr 3.88 36 1988 4 12 -17.5 -72.8 15 7.1 2001 7 7 -17.5 -72.4 25 7.7 43.0 -5 20.0 4833.430 Thr Thr 1.07 37 1988 8 10 -10.5 160.8 16 7.6 2003 1 20 -10.4 160.6 31 7.3 22.4 3 56.8 5276.170 Thr Thr 2.10 38 1990 4 18 1.3 123.3 33 7.7 1991 6 20 1.0 123.2 15 7.6 37.4 1 28.7 427.652 Thr Thr 1.64 39 1991 11 19 4.8 -77.2 19 7.2 2004 11 15 4.7 -77.6 16 7.3 44.2 0 11.5 4744.443 Thr Thr 0.72 40 1992 5 17 7.3 127.0 34 7.1 1992 5 17 7.3 127.2 25 7.3 26.7 -1 12.9 0.018 Thr Thr 1.11 41 1992 5 17 7.3 127.0 34 7.1 1993 5 11 7.1 127.0 47 7.0 26.1 1 17.9 359.359 Thr Thr 0.91 42 1992 5 17 7.3 127.2 25 7.3 1993 5 11 7.1 127.0 47 7.0 41.4 3 20.8 359.341 Thr Thr 0.67 43 1992 6 28 34.7 -116.7 15 7.4 1999 10 16 34.7 -116.3 15 7.2 35.4 2 17.1 2665.909 S-s S-s 0.94 44 1993 5 11 7.1 127.0 47 7.0 2001 1 1 6.7 127.1 44 7.5 38.7 -4 2.7 2791.521 Thr Thr 0.91 45 1993 8 8 13.1 145.3 59 7.8 2001 10 12 12.9 145.1 42 7.1 36.2 8 80.7 2987.269 Thr Thr 1.48 46 1993 8 10 -45.0 166.7 15 7.0 2003 8 21 -45.0 166.9 32 7.3 20.5 -1 23.4 3663.473 Thr Thr 1.29 47 1994 2 12 -20.5 169.0 43 7.0 2007 3 25 -20.6 169.1 42 7.2 16.3 -1 5.2 4788.279 Thr Thr 1.52 48 1995 5 5 12.7 125.3 18 7.1 1996 6 11 12.7 125.4 29 7.1 18.0 0 8.3 403.604 Thr Thr 1.41 49 1995 7 3 -29.1 -177.2 45 7.2 1997 9 20 -28.8 -177.0 46 7.0 40.1 2 3.8 809.848 Thr Thr 0.63 50 1995 7 30 -24.2 -70.7 29 8.1 1998 1 30 -24.0 -70.6 41 7.1 23.9 10 8.4 915.295 Thr Thr 3.20 51 1999 5 16 -5.0 152.8 42 7.1 2000 11 16 -5.0 153.2 31 7.9 46.9 -7 14.2 550.286 Thr Thr 1.26 52 2001 6 23 -17.3 -72.7 30 8.5 2001 7 7 -17.5 -72.4 25 7.7 33.8 8 8.0 13.545 Thr Thr 4.72 53 2003 3 17 51.3 177.6 27 7.1 2003 11 17 51.1 177.9 22 7.8 29.2 -6 8.5 244.588 Thr Thr 1.86 54 2003 12 27 -22.0 169.8 23 7.3 2004 1 3 -22.4 169.7 15 7.2 48.2 1 80.4 7.015 Thr Nor 0.67 55 2004 2 5 -3.6 135.5 13 7.0 2004 11 26 -3.5 135.5 12 7.2 7.9 0 48.5 294.222 S-s Nor 3.09 56 2004 9 5 32.9 137.0 16 7.3 2004 9 5 33.1 137.2 12 7.4 29.7 -1 10.1 0.202 Thr Thr 1.30 The last column is the ratio of earthquake focal zone sizes to twice their distance (zones overlap), see equations (2-3) in Kagan and Jackson, 1999. The total number of earthquakes, with magnitude >= 7.0 is 312