Issued: May 6, 1997 Prepared by: Nan Macgregor-Scott No. 18 - 97 The following is a list of significant earthquakes during the time period April 28 - May 4, 1997 April 28 at 03:59 UTC (07:59 pm ADT), mb 4.7, 51 N 42', 174 W 11', depth fixed at 33 km (21 mi): A light earthquake was located by NEIC in the Andreanof Islands region of Alaska about 34 mi ( 55 km) S of Atka 103 mi (166 km) WSW of Amukta Pass 107 mi (172 km) E of Adak 241 mi (388 km) WSW of Nikolski 294 mi (473 km) E of Amchitka April 28 at 05:20 UTC (09:20 pm ADT), mb 4.6, 52 N 2', 174 E 21', depth fixed at 33 km (21 mi): A light earthquake was located by NEIC in the Near Islands region of Alaska about 48 mi ( 77 km) SSE of Shemya Is 71 mi (114 km) WSW of Buldir Is 78 mi (126 km) SE of Attu 203 mi (326 km) WNW of Amchitka 385 mi (619 km) W of Adak April 28 at 07:05 UTC (11:05 pm ADT), mb 4.6, 52 N 23', 167 W 14', depth fixed at 33 km (21 mi): A light earthquake was located by NEIC in the Fox Islands region of Alaska about 79 mi (127 km) ESE of Nikolski 107 mi (172 km) SSW of Unalaska 109 mi (175 km) SSW of Dutch Harbor 136 mi (218 km) SSW of Akutan 202 mi (325 km) E of Amukta Pass April 30 at 19:47 UTC (11:47 am ADT), mb 4.5, 51 N 5', 177 W 0', depth fixed at 33 km (21 mi): A light earthquake was located by NEIC in the Andreanof Islands region of Alaska about 56 mi ( 91 km) SSW of Adak 143 mi (230 km) WSW of Atka 176 mi (283 km) E of Amchitka 232 mi (373 km) WSW of Amukta Pass 316 mi (509 km) ESE of Buldir Is April 30 at 21:19 UTC (01:19 pm ADT), mb 4.5, 50 N 58', 177 W 36', depth fixed at 33 km (21 mi): A light earthquake was located by NEIC in the Andreanof Islands region of Alaska about 75 mi (121 km) SSW of Adak 153 mi (246 km) ESE of Amchitka 170 mi (273 km) WSW of Atka 259 mi (418 km) WSW of Amukta Pass 295 mi (474 km) ESE of Buldir Is May 1 at 09:16 UTC (01:16 am ADT), mb 4.8, 51 N 19', 178 W 57', depth fixed at 33 km (21 mi): A light earthquake was located by NEIC in the Andreanof Islands region of Alaska about 90 mi (145 km) E of Amchitka 106 mi (171 km) WSW of Adak 213 mi (343 km) WSW of Atka 231 mi (372 km) ESE of Buldir Is 306 mi (493 km) W of Amukta Pass May 3 at 04:44 UTC (08:44 pm ADT), ML 3.5, 54 N 3', 165 W 39', depth = 119 km (74 mi): A minor earthquake was located in the Fox Islands region of Alaska about 8 mi ( 12 km) SE of Akutan 38 mi ( 60 km) ENE of Dutch Harbor 39 mi ( 62 km) ENE of Unalaska 106 mi (170 km) WSW of False Pass 141 mi (227 km) WSW of Cold Bay _____________________________________________________________________________________________________________________________________________________ DATE TIME LATITUDE LONGITUDE DEPTH PREF. RMS SEH SEZ GAP PHASES MIN Q T REGION, OTHER MAGNITUDES, FELT REPORTS AND COMMENTS YR MO DY HR MN SEC DEG MIN DEG MIN KM MAG SEC. KM KM DEG P S DIS _____________________________________________________________________________________________________________________________________________________ 97 4 28 0 39 32.47 61 48.91N 149 39.78W 20.2 2.2 0.31 1.28 3.39 53 19 8 22 B E COOK INLET. 97 4 28 3 59 19.39 51 42.00N 174 10.56W 33.0N 4.7mb R ANDREANOF ISLS. 97 4 28 4 36 31.22 60 4.10N 152 47.89W 109.5 1.9 0.26 2.15 2.12 74 25 8 9 A E COOK INLET. 97 4 28 5 20 5.00 52 2.22N 174 21.06E 33.0N 4.6mb R NEAR ISLS. 97 4 28 7 5 42.54 52 22.92N 167 13.92W 33.0N 4.6mb R FOX ISLS. 97 4 28 7 6 15.58 63 16.33N 151 8.56W 9.4 2.5 0.24 3.87 4.37 102 17 7 33 B E CENTRAL AK. 97 4 28 7 42 33.11 61 53.35N 150 56.91W 63.0 2.2 0.21 1.41 2.98 100 18 7 32 B E COOK INLET. 97 4 28 9 44 5.84 60 39.38N 150 41.05W 12.3 1.6 0.26 1.09 1.28 55 30 10 30 A E KENAI PEN. 97 4 28 13 46 53.84 63 15.50N 151 6.22W 6.3 2.7 0.23 1.63 1.65 112 16 6 34 A E CENTRAL AK. 97 4 28 15 1 20.14 60 59.94N 147 13.85W 22.1 1.5 0.17 2.89 3.50 51 15 4 15 B E PR WILLIAM SOUND. 97 4 28 16 48 28.10 60 42.41N 148 16.08W 25.5 2.8 0.33 0.73 2.19 62 18 6 17 A E KENAI PEN. 97 4 28 19 8 13.07 61 20.62N 146 47.23W 14.4 1.3 0.16 1.11 1.27 97 15 7 34 A E PR WILLIAM SOUND. 97 4 28 19 28 18.98 59 16.79N 152 39.27W 74.9 2.2 0.24 3.31 5.42 165 20 11 42 C E COOK INLET. 97 4 28 21 3 26.39 64 53.55N 149 11.30W 20.8 0.8 0.17 4.28 3.20 158 4 4 36 B E CENTRAL AK. 97 4 28 21 17 56.75 61 23.06N 146 48.65W 17.5 0.9 0.25 0.79 2.01 104 11 6 38 A E PR WILLIAM SOUND. 97 4 28 22 54 2.33 62 42.74N 149 44.02W 65.7 1.6 0.06 3.78 2.16 98 16 4 30 B E CENTRAL AK. 97 4 28 22 55 8.79 62 38.10N 152 16.56W 10.2 1.9 0.22 5.17 6.61 211 14 5 83 C E CENTRAL AK. 97 4 29 1 18 17.37 60 42.83N 151 40.16W 77.1 2.3 0.25 0.93 1.78 55 25 18 24 A E KENAI PEN. 97 4 29 1 24 39.37 59 40.28N 150 52.88W 41.4 2.5 0.33 1.94 2.25 156 18 13 10 A E KENAI PEN. 97 4 29 2 15 45.74 60 15.15N 151 35.87W 63.3 1.8 0.19 1.83 2.57 75 17 13 29 B E KENAI PEN. 97 4 29 5 13 36.61 60 2.74N 153 6.72W 0.0 -0.2 0.09 7.03 51.59 253 4 3 3 D a COOK INLET. 97 4 29 6 24 28.59 61 19.61N 146 49.95W 14.4 1.1 0.25 0.91 1.40 94 9 8 33 A E PR WILLIAM SOUND. 97 4 29 8 30 22.34 59 59.11N 153 4.92W 2.4 0.4 0.04 1.18 2.02 196 5 5 3 A a COOK INLET. 97 4 29 8 37 42.76 60 21.44N 152 29.87W 101.8 2.3 0.28 1.79 3.12 73 19 13 18 B E COOK INLET. 97 4 29 16 13 6.77 60 28.05N 151 37.54W 64.9 2.0 0.32 0.97 2.27 70 21 15 37 A E KENAI PEN. 97 4 29 19 6 40.45 63 30.00N 151 0.36W 2.4 1.3 0.13 7.28 3.07 261 7 3 7 C E CENTRAL AK. 97 4 29 19 32 11.74 63 27.86N 150 53.90W 6.2 1.7 0.27 2.10 0.98 138 13 7 10 A E CENTRAL AK. 97 4 29 21 3 0.85 63 16.02N 151 17.97W 5.9 2.1 0.22 2.32 3.26 173 17 9 37 B E CENTRAL AK. 97 4 29 21 53 40.80 61 1.45N 147 4.17W 7.6 0.6 0.17 5.41 6.03 141 5 2 16 C E PR WILLIAM SOUND. 97 4 30 2 6 52.43 63 27.57N 150 51.38W 3.6 2.1 0.31 1.32 3.49 83 19 9 11 B E CENTRAL AK. 97 4 30 6 14 18.27 61 33.75N 146 17.38W 34.0 1.9 0.30 1.17 2.38 67 13 10 21 A E PR WILLIAM SOUND. 97 4 30 9 21 38.52 64 44.63N 148 50.25W 17.0 1.4 0.28 2.86 2.67 120 12 7 22 B E CENTRAL AK. 97 4 30 9 21 41.00 64 44.53N 148 52.53W 20.4 1.9 0.41 2.09 1.38 121 13 12 21 A E CENTRAL AK. 97 4 30 10 31 3.09 60 3.19N 152 24.83W 79.3 1.6 0.33 1.44 2.31 91 20 14 31 A E COOK INLET. 97 4 30 13 3 34.74 60 38.32N 151 37.82W 65.9 1.8 0.30 0.94 3.04 49 22 14 43 B E KENAI PEN. 97 4 30 17 55 56.70 63 1.80N 150 54.26W 118.6 2.9 0.20 2.32 3.16 89 24 8 56 B E CENTRAL AK. 97 4 30 19 47 28.00 51 5.40N 177 0.00W 33.0N 4.5mb R ANDREANOF ISLS. 97 4 30 21 19 28.00 50 57.60N 177 36.00W 33.0N 4.5mb R ANDREANOF ISLS. 97 5 1 1 58 58.20 59 51.59N 150 53.32W 53.0 2.8 0.18 1.22 2.23 110 21 7 11 A E KENAI PEN. 97 5 1 2 53 24.09 61 29.16N 152 0.10W 6.1 0.9 0.04 2.23 12.99 162 11 4 12 D E COOK INLET. 97 5 1 2 54 7.30 60 18.25N 151 21.31W 50.1 1.5 0.28 1.40 2.74 61 25 11 29 B E KENAI PEN. 97 5 1 4 23 56.19 59 57.14N 151 31.05W 46.9 1.8 0.21 1.62 3.38 47 27 5 16 B E KENAI PEN. 97 5 1 9 16 24.00 51 18.60N 178 57.00W 33.0N 4.8mb R ANDREANOF ISLS. 97 5 1 9 29 55.39 65 8.97N 148 36.97W 10.7 2.5 0.26 2.58 1.52 130 15 9 28 B E N CENTRAL AK. 97 5 1 10 1 37.35 60 11.51N 152 20.05W 93.2 2.1 0.27 2.33 1.96 71 33 9 37 A E COOK INLET. 97 5 1 13 35 58.98 62 48.46N 150 39.60W 77.3 1.7 0.15 4.10 5.46 143 19 6 49 C E CENTRAL AK. 97 5 1 14 50 58.08 61 44.96N 150 21.10W 1.1 1.4 0.24 1.10 1.19 101 20 6 27 A E COOK INLET. 97 5 1 14 51 37.44 61 51.11N 150 26.09W 38.2 1.5 0.19 2.91 7.84 96 17 5 37 C E COOK INLET. 97 5 1 15 16 23.47 59 59.03N 153 3.77W 1.8 0.4 0.04 1.15 2.49 155 5 3 3 A a COOK INLET. 97 5 1 15 47 34.73 59 59.04N 153 3.92W 1.5 -0.3 0.05 2.49 3.37 160 5 5 3 B a COOK INLET. _____________________________________________________________________________________________________________________________________________________ DATE TIME LATITUDE LONGITUDE DEPTH PREF. RMS SEH SEZ GAP PHASES MIN Q T REGION, OTHER MAGNITUDES, FELT REPORTS AND COMMENTS YR MO DY HR MN SEC DEG MIN DEG MIN KM MAG SEC. KM KM DEG P S DIS _____________________________________________________________________________________________________________________________________________________ 97 5 1 16 20 25.60 61 42.23N 147 9.02W 27.5 1.8 0.21 1.72 3.07 63 16 4 17 B E PR WILLIAM SOUND. 97 5 1 16 21 57.64 62 5.86N 149 25.96W 24.0 1.7 0.20 3.28 6.67 49 15 6 55 C E CENTRAL AK. 97 5 1 23 10 5.01 62 58.26N 151 2.82W 108.8 2.5 0.12 3.20 3.36 94 20 4 65 B E CENTRAL AK. 97 5 2 0 40 57.66 61 57.42N 147 1.74W 30.0 1.2 0.37 3.00 3.00 142 14 8 21 B E PR WILLIAM SOUND. 97 5 2 1 34 34.98 64 27.15N 147 39.08W 20.0 1.8 0.27 0.89 1.16 58 14 11 21 A E CENTRAL AK. 97 5 2 2 17 14.17 60 23.31N 152 24.36W 107.9 3.1 0.21 3.19 1.32 198 16 13 20 B E COOK INLET. 97 5 2 3 5 14.19 60 21.93N 151 21.15W 47.0 2.3 0.25 1.53 3.14 77 15 10 36 B E KENAI PEN. 97 5 2 4 31 16.73 61 51.05N 150 15.95W 37.5 1.8 0.27 0.89 2.29 77 14 9 30 A E COOK INLET. 97 5 2 5 0 39.77 64 3.69N 147 20.53W 16.5 1.6 0.35 1.18 1.32 77 16 6 43 A E CENTRAL AK. 97 5 2 5 31 44.84 61 19.79N 151 15.99W 60.5 1.6 0.38 7.17 12.46 84 10 4 32 D E COOK INLET. 97 5 2 5 53 59.15 59 41.61N 152 46.07W 91.1 2.8 0.25 1.32 2.85 98 18 13 26 B E COOK INLET. 97 5 2 6 36 43.04 63 27.43N 150 51.96W 4.6 2.2 0.29 1.47 2.71 86 16 7 11 B E CENTRAL AK. 97 5 2 8 20 36.47 60 1.97N 153 4.77W 0.0 -0.1 0.08 3.62 12.39 195 5 4 3 D a COOK INLET. 97 5 2 8 39 46.04 60 57.17N 146 59.15W 23.2 1.4 0.17 1.23 1.29 60 13 7 10 A E PR WILLIAM SOUND. 97 5 2 9 17 30.98 60 11.15N 153 9.29W 147.4 2.5 0.21 6.26 2.36 94 22 5 15 C E COOK INLET. 97 5 2 13 1 5.91 61 32.99N 146 24.38W 23.8 1.5 0.22 1.54 3.00 68 16 5 27 B E PR WILLIAM SOUND. 97 5 2 13 18 6.67 64 52.50N 145 57.94W 5.0 1.9 0.29 1.69 5.46 123 14 5 68 C E E CENTRAL AK. 97 5 2 13 25 57.99 63 31.53N 150 52.23W 11.9 2.3 0.14 1.68 1.05 63 19 5 4 A E CENTRAL AK. 97 5 2 14 34 52.53 59 58.03N 152 6.84W 78.4 3.4 0.26 0.68 2.17 61 35 17 43 A E COOK INLET. 97 5 2 18 12 53.48 60 10.69N 148 8.77W 12.1 2.3 0.09 2.27 3.50 121 15 7 22 B E KENAI PEN. 97 5 2 18 43 58.92 63 9.06N 152 5.55W 18.6 3.1 0.26 2.41 1.99 112 20 5 74 A E CENTRAL AK. 97 5 2 19 30 3.08 60 17.45N 140 53.98W 0.0 0.9 0.18 8.24 15.42 138 5 2 28 D E YAKUTAT BAY. 97 5 2 21 22 46.64 62 0.89N 147 23.39W 40.1 2.3 0.26 1.24 2.55 42 17 4 20 B E CENTRAL AK. 97 5 3 2 33 57.74 60 26.31N 147 47.02W 7.7 1.4 0.25 0.84 2.91 92 15 12 45 B E PR WILLIAM SOUND. 97 5 3 4 42 13.68 61 30.61N 146 21.74W 29.5 2.3 0.35 0.99 1.88 68 14 9 24 A E PR WILLIAM SOUND. 97 5 3 4 44 3.59 54 3.13N 165 38.62W 118.9 3.5 0.18 11.79 3.22 187 13 12 7 D E FOX ISLS. 97 5 3 5 9 15.56 63 16.98N 151 10.87W 12.3 2.9 0.27 2.04 2.57 76 19 5 33 B E CENTRAL AK. 97 5 3 5 27 18.34 61 27.20N 146 13.25W 31.2 1.9 0.29 1.49 2.05 56 13 9 17 A E PR WILLIAM SOUND. 97 5 3 6 38 39.04 61 30.41N 146 23.37W 29.2 1.4 0.24 1.76 3.39 84 12 7 25 B E PR WILLIAM SOUND. 97 5 3 9 34 39.19 60 48.16N 151 6.65W 15.0 1.6 0.23 0.85 0.90 68 23 14 10 A E KENAI PEN. 97 5 3 10 26 25.75 61 40.90N 150 3.04W 38.0 1.6 0.27 1.51 2.80 90 15 10 10 B E COOK INLET. 97 5 3 10 27 46.37 57 46.19N 152 51.79W 38.4 3.2 0.21 6.51 10.39 186 15 3 22 D E KODIAK IS REG. 97 5 3 14 21 8.09 61 10.65N 146 20.89W 16.3 0.3 0.16 3.43 1.10 173 4 3 5 B E PR WILLIAM SOUND. 97 5 3 15 44 7.34 60 31.76N 152 46.48W 5.1 -0.4 0.04 1.43 2.32 156 7 5 2 A a COOK INLET. 97 5 3 19 53 39.63 61 27.28N 150 22.66W 12.5 2.2 0.33 0.64 0.95 49 14 12 20 A E COOK INLET. 97 5 3 20 48 40.98 62 57.17N 150 53.92W 107.5 2.0 0.19 4.08 5.56 162 14 6 63 C E CENTRAL AK. 97 5 3 22 42 20.55 60 24.52N 146 52.74W 22.4 2.3 0.21 1.00 1.89 123 15 7 21 A E PR WILLIAM SOUND. 97 5 3 22 58 38.48 65 46.93N 148 4.45W 27.0 2.4 0.48 3.10 12.00 121 14 5 92 D E N CENTRAL AK. 97 5 3 23 0 23.07 65 42.63N 147 50.72W 24.6 2.0 0.59 5.40 99.00 168 10 6 83 D E N CENTRAL AK. 97 5 4 1 2 47.38 58 46.41N 154 18.22W 90.1 2.2 0.08 10.25 13.00 148 10 4 42 D E ALASKA PEN. 97 5 4 3 10 24.45 59 41.70N 139 38.74W 0.0 1.5 0.38 7.63 10.30 195 5 3 16 D E YAKUTAT BAY. 97 5 4 6 40 20.30 60 28.10N 149 31.53W 31.9 2.4 0.09 3.35 4.53 104 10 4 9 B E KENAI PEN. 97 5 4 6 56 23.40 60 30.44N 149 10.58W 27.7 2.8 0.17 1.65 2.77 74 15 9 10 B E KENAI PEN. 97 5 4 7 20 35.73 60 4.11N 153 2.54W 104.5 1.9 0.13 11.16 11.65 81 10 3 1 D E COOK INLET. 97 5 4 8 4 24.53 60 35.21N 141 27.94W 9.4 2.1 0.29 2.74 10.34 115 11 4 43 D E YAKUTAT BAY. 97 5 4 8 4 13.95 64 43.78N 148 34.73W 12.1 1.3 0.18 2.64 3.62 104 13 5 29 B E CENTRAL AK. 97 5 4 8 6 39.37 64 57.82N 147 54.68W 8.6 1.0 0.13 2.59 4.63 146 12 7 10 B E CENTRAL AK. 97 5 4 8 57 11.78 63 22.23N 145 10.71W 3.6 3.5 0.17 0.80 2.21 88 16 5 29 A E E CENTRAL AK. 97 5 4 9 7 25.66 61 19.85N 146 37.55W 25.4 1.2 0.12 3.68 6.85 86 10 5 27 C E PR WILLIAM SOUND. 97 5 4 10 6 47.28 63 31.04N 151 4.61W 7.1 1.7 0.14 5.56 3.90 148 8 5 9 C E CENTRAL AK. _____________________________________________________________________________________________________________________________________________________ DATE TIME LATITUDE LONGITUDE DEPTH PREF. RMS SEH SEZ GAP PHASES MIN Q T REGION, OTHER MAGNITUDES, FELT REPORTS AND COMMENTS YR MO DY HR MN SEC DEG MIN DEG MIN KM MAG SEC. KM KM DEG P S DIS _____________________________________________________________________________________________________________________________________________________ 97 5 4 10 16 36.09 60 32.72N 152 11.70W 83.8 2.6 0.18 4.71 8.61 94 11 4 12 C E COOK INLET. 97 5 4 12 39 48.87 63 16.11N 151 12.40W 0.0 1.5 0.15 5.84 12.91 77 9 3 35 D E CENTRAL AK. 97 5 4 12 53 32.40 63 30.34N 150 54.42W 11.8 1.7 0.14 4.64 3.22 77 9 3 5 B E CENTRAL AK. 97 5 4 14 57 13.64 59 34.99N 152 30.91W 75.4 1.8 0.13 7.25 12.93 116 10 4 50 D E COOK INLET. 97 5 4 15 50 24.90 63 33.73N 150 47.17W 11.5 2.0 0.12 4.29 2.94 73 9 3 7 B E CENTRAL AK. 97 5 4 16 19 2.23 60 41.42N 151 9.31W 50.1 1.5 0.13 4.71 5.36 62 12 5 7 C E KENAI PEN. 97 5 4 16 46 7.85 60 42.28N 147 14.27W 24.9 1.9 0.17 1.10 1.64 75 15 7 21 A E PR WILLIAM SOUND. 97 5 4 19 10 58.12 59 26.85N 153 36.39W 123.6 3.1 0.12 2.70 4.68 58 14 5 12 B E COOK INLET. 97 5 4 22 0 37.67 63 15.40N 149 44.01W 98.2 2.2 0.14 6.29 9.86 88 10 5 31 C E CENTRAL AK. 97 5 4 22 1 14.22 58 10.78N 142 48.69W 10.0G 2.4 0.24 35.88 57.26 258 12 3 215 D E GULF OF ALASKA.