ssued: December 31, 1997 Prepared by: Nan Macgregor-Scott No. 51 - 97 The following is a list of significant earthquakes during the time period December 15 - 21, 1997 December 15 at 14:22 UTC (05:22 am AST), ML 4.8, 64 N 33', 162 W 40', depth = 25 km (16 mi): A light earthquake awakened residents of Golovin, Elim, White Mountain and Koyuk. It was located in the Seward Peninsula region of Alaska about 11 mi ( 17 km) E of Golovin (Cheenik) 13 mi ( 21 km) WSW of Elim 23 mi ( 38 km) ESE of White Mountain 48 mi ( 78 km) WNW of Shaktoolik 52 mi ( 84 km) WSW of Koyuk December 16 at 18:15 UTC (09:15 am AST), ML 3.5, 53 N 45', 164 W 10', depth = 7 km (4 mi): A minor earthquake was located in the Unimak Island region of Alaska about 71 mi (114 km) ESE of Akutan 82 mi (132 km) SSW of False Pass 97 mi (156 km) E of Dutch Harbor 98 mi (157 km) E of Unalaska 115 mi (185 km) SSW of Cold Bay December 16 at 19:17 UTC (10:17 am AST), ML 3.7, 53 N 44', 164 W 10', depth = 2 km (1 mi): A minor earthquake was located in the Unimak Island region of Alaska about 71 mi (115 km) ESE of Akutan 83 mi (134 km) SSW of False Pass 97 mi (156 km) E of Dutch Harbor 98 mi (157 km) E of Unalaska 116 mi (187 km) SSW of Cold Bay December 17 at 04:38 UTC (07:38 pm AST), MS 6.5, 51 N 18', 178 E 51', depth fixed at 33 km (21 mi): A strong earthquake, felt at Adak, was located by NEIC in the Rat Islands region of Alaska about 17 mi ( 28 km) SSW of Amchitka 145 mi (233 km) ESE of Buldir Is 198 mi (318 km) W of Adak 225 mi (361 km) ESE of Shemya Is 265 mi (426 km) ESE of Attu December 17 at 11:45 UTC (02:45 am AST), mb 5.1, 51 N 14', 179 E 6', depth fixed at 33 km (21 mi): A moderate earthquake, felt at Adak, was located by NEIC in the Rat Islands region of Alaska about 22 mi ( 35 km) SSE of Amchitka 157 mi (252 km) ESE of Buldir Is 189 mi (303 km) WSW of Adak 236 mi (380 km) ESE of Shemya Is 277 mi (445 km) ESE of Attu December 17 at 18:31 UTC (09:31 am AST), mb 4.6, 50 N 58', 178 E 47', depth fixed at 33 km (21 mi): A light earthquake was located by NEIC in the Rat Islands region of Alaska about 40 mi ( 64 km) SSW of Amchitka 156 mi (251 km) SE of Buldir Is 207 mi (333 km) WSW of Adak 234 mi (376 km) ESE of Shemya Is 274 mi (440 km) ESE of Attu December 18 at 09:24 UTC (12:24 am AST), ML 4.0, 54 N 5', 164 W 4', depth = 10 km (6 mi): A light earthquake was located in the Unimak Island region of Alaska about 59 mi ( 96 km) SSW of False Pass 70 mi (112 km) E of Akutan 94 mi (150 km) SW of Cold Bay 98 mi (157 km) SW of King Cove 101 mi (163 km) E of Dutch Harbor December 18 at 10:22 UTC (01:22 am AST), mb 4.3, 51 N 20', 179 W 23', depth fixed at 33 km (21 mi): A light earthquake was located by NEIC in the Andreanof Islands region of Alaska about 71 mi (114 km) E of Amchitka 124 mi (199 km) WSW of Adak 213 mi (342 km) ESE of Buldir Is 230 mi (371 km) WSW of Atka 293 mi (472 km) ESE of Shemya Is December 19 at 12:14 UTC (03:14 am AST), mb 4.8, 51 N 10', 178 E 56', depth fixed at 33 km (21 mi): A light earthquake was located by NEIC in the Rat Islands region of Alaska about 26 mi ( 42 km) S of Amchitka 153 mi (246 km) ESE of Buldir Is 197 mi (317 km) WSW of Adak 232 mi (373 km) ESE of Shemya Is 272 mi (438 km) ESE of Attu December 19 at 22:51 UTC (01:51 pm AST), mb 4.5, 51 N 44', 179 E 3', depth fixed at 33 km (21 mi): A light earthquake was located by NEIC in the Rat Islands region of Alaska about 15 mi ( 24 km) N of Amchitka 140 mi (225 km) ESE of Buldir Is 185 mi (297 km) W of Adak 220 mi (354 km) ESE of Shemya Is 260 mi (418 km) ESE of Attu _____________________________________________________________________________________________________________________________________________________ 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 12 15 1 32 20.93 64 33.87N 150 17.35W 18.4 2.5 0.46 1.63 1.02 87 17 9 56 A E CENTRAL AK. 97 12 15 1 37 32.83 61 49.15N 149 44.57W 10.0 2.4 0.60 0.99 1.18 48 16 11 20 A E COOK INLET. 97 12 15 3 4 5.56 61 36.15N 146 15.64W 36.6 1.5 0.45 0.91 1.27 70 14 5 22 A E PR WILLIAM SOUND. 97 12 15 3 7 29.83 59 44.95N 153 31.27W 133.1 2.7 0.16 3.80 2.10 76 26 13 20 B E COOK INLET. 97 12 15 4 3 8.05 61 35.07N 146 16.20W 34.4 1.1 0.36 0.96 2.36 104 13 7 21 A E PR WILLIAM SOUND. 97 12 15 6 51 53.90 62 33.29N 152 31.81W 169.8 2.4 0.25 5.69 12.35 101 17 5 118 D E CENTRAL AK. 97 12 15 6 56 33.13 63 10.02N 151 25.92W 33.0N 2.8A R CENTRAL AK. 97 12 15 9 35 12.42 64 47.65N 147 28.13W 15.1 1.6 0.25 0.85 1.47 85 12 9 21 A E CENTRAL AK. 97 12 15 10 5 55.06 54 3.23N 163 58.15W 7.1 3.4 0.25 3.23 5.45 226 14 6 73 C E UNIMAK IS. 97 12 15 11 56 21.05 61 53.15N 150 29.22W 45.0 1.8 0.25 1.09 3.75 90 17 14 41 B E COOK INLET. 97 12 15 14 22 33.12 64 33.27N 162 40.34W 25.1 4.8 0.28 12.44 53.28 133 15 3 129 D E SEWARD PEN. 97 12 15 15 37 16.97 63 9.80N 149 24.51W 88.6 2.2 0.20 2.42 2.70 91 16 11 24 B E CENTRAL AK. 97 12 15 16 41 50.31 63 6.28N 150 11.42W 98.6 2.4 0.21 2.67 3.48 85 19 9 31 B E CENTRAL AK. 97 12 15 17 2 18.65 62 21.88N 151 29.42W 95.7 2.9 0.21 1.81 3.27 80 17 9 43 B E CENTRAL AK. 97 12 15 18 12 47.81 63 1.62N 148 47.75W 71.2 2.0 0.21 1.37 2.11 83 17 12 42 A E CENTRAL AK. 97 12 15 19 0 7.06 59 34.16N 153 55.23W 128.3 2.7 0.20 2.89 3.41 119 23 8 29 B E COOK INLET. 97 12 15 19 19 3.72 60 8.89N 152 32.17W 92.2 3.3 0.29 0.94 1.92 68 23 15 25 A E COOK INLET. 97 12 15 19 23 8.13 62 4.71N 150 37.24W 65.6 1.8 0.29 2.09 3.78 96 18 12 41 B E CENTRAL AK. 97 12 15 20 59 20.08 60 19.30N 152 14.88W 83.7 2.4 0.21 2.72 3.75 70 16 10 29 B E COOK INLET. 97 12 15 22 30 49.39 61 8.37N 151 11.56W 65.0 1.9 0.21 1.26 3.37 119 16 11 44 B E COOK INLET. 97 12 15 22 35 24.45 63 6.93N 150 1.10W 100.2 2.3 0.20 1.85 2.60 83 16 11 25 B E CENTRAL AK. 97 12 15 22 56 56.24 61 0.55N 146 19.39W 17.2 1.9 0.30 1.69 1.52 75 18 3 14 A E PR WILLIAM SOUND. 97 12 16 2 19 51.06 63 16.29N 151 18.16W 11.1 3.2 0.23 5.98 7.56 78 15 4 90 C E CENTRAL AK. 97 12 16 3 2 33.94 60 27.59N 146 44.00W 14.8 1.7 0.13 2.39 12.71 74 15 7 31 D E PR WILLIAM SOUND. 97 12 16 3 45 21.11 59 42.77N 153 39.36W 123.9 2.4 0.17 6.48 8.84 66 14 5 25 C E COOK INLET. 97 12 16 6 41 10.04 60 50.95N 149 27.58W 38.0 1.2 0.19 5.63 7.84 89 12 4 24 C E KENAI PEN. 97 12 16 7 19 20.77 60 41.06N 148 42.54W 33.4 1.4 0.08 3.96 5.46 66 12 6 26 C E KENAI PEN. 97 12 16 9 12 26.09 61 19.77N 147 2.55W 18.0 1.1 0.08 5.95 12.24 88 12 7 39 D E PR WILLIAM SOUND. 97 12 16 10 38 27.89 63 16.07N 151 8.35W 7.7 2.8 0.25 6.23 6.15 75 14 4 82 C E CENTRAL AK. 97 12 16 10 44 14.58 61 27.30N 150 18.20W 48.0 2.7 0.11 1.71 4.50 75 15 7 31 B E COOK INLET. 97 12 16 10 53 20.36 53 40.50N 166 21.23W 77.6 3.1 0.21 33.43 16.99 239 13 6 32 D E FOX ISLS. 97 12 16 11 0 38.98 60 6.12N 152 26.29W 92.0 2.8 0.19 1.99 4.98 49 16 5 29 B E COOK INLET. 97 12 16 12 53 24.24 61 19.82N 147 32.38W 33.5 1.0 0.09 7.82 10.86 66 11 3 20 D E PR WILLIAM SOUND. 97 12 16 13 11 53.72 60 12.58N 151 56.47W 47.1 1.6 0.17 3.74 9.01 53 14 6 41 C E KENAI PEN. 97 12 16 13 13 32.74 63 45.21N 148 50.59W 108.7 2.0 0.11 4.62 9.19 85 13 5 5 C E CENTRAL AK. 97 12 16 13 44 21.97 62 4.12N 147 28.20W 40.2 2.1 0.19 3.37 7.72 77 16 6 27 C E CENTRAL AK. 97 12 16 14 20 28.59 62 17.95N 148 49.56W 37.2 3.0 0.11 2.04 6.01 68 15 5 59 C E CENTRAL AK. 97 12 16 16 36 15.37 61 44.84N 150 53.93W 54.3 1.6 0.20 5.74 10.55 85 8 6 42 D E COOK INLET. 97 12 16 17 33 16.68 61 21.85N 150 22.51W 56.0 1.1 0.32 7.27 13.49 89 11 4 41 D E COOK INLET. 97 12 16 18 15 21.84 53 44.98N 164 9.65W 6.8 3.5 0.15 9.49 9.78 224 15 11 108 C E UNIMAK IS. 97 12 16 18 48 31.24 59 53.89N 152 4.41W 73.7 2.1 0.24 4.59 10.74 68 12 6 36 D E COOK INLET. 97 12 16 19 0 20.24 59 44.17N 152 26.79W 75.2 2.1 0.24 5.67 10.74 64 9 4 43 D E COOK INLET. 97 12 16 19 4 30.85 53 49.09N 164 16.75W 5.2 2.8 0.30 28.65 27.89 225 15 5 101 D E UNIMAK IS. 97 12 16 19 16 44.37 59 50.41N 152 49.08W 96.2 1.7 0.11 9.59 10.98 52 14 4 19 D E COOK INLET. 97 12 16 19 17 9.55 53 43.84N 164 9.84W 1.7 3.7 0.17 10.52 10.77 222 17 8 109 D E UNIMAK IS. 97 12 16 20 39 57.40 61 30.07N 151 49.36W 79.2 2.1 0.31 6.62 14.14 91 10 3 21 D E COOK INLET. 97 12 16 21 13 54.22 63 18.15N 151 12.73W 10.8 2.9 0.24 4.39 6.48 77 10 5 87 C E CENTRAL AK. 97 12 16 21 43 57.59 63 22.61N 145 37.29W 11.1 1.9 0.17 3.05 3.20 83 14 5 8 B E E CENTRAL AK. 97 12 17 4 20 27.50 60 5.71N 153 1.32W 110.4 2.5 0.29 1.82 2.74 91 22 11 4 B E COOK INLET. 97 12 17 4 38 53.83 51 17.94N 178 51.24E 33.0N 6.5Ms R RAT ISLS. _____________________________________________________________________________________________________________________________________________________ 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 12 17 5 6 32.05 60 6.25N 153 33.44W 160.1 2.2 0.24 8.93 4.35 113 18 9 24 C E COOK INLET. 97 12 17 5 22 41.73 63 19.98N 151 54.96W 33.0N 3.1A R CENTRAL AK. 97 12 17 10 48 44.27 61 11.05N 151 49.25W 80.9 2.4 0.36 2.96 4.35 65 13 8 17 B E COOK INLET. 97 12 17 11 45 9.79 51 13.56N 179 6.06E 33.0N 5.1mb R RAT ISLS. 97 12 17 14 0 10.09 61 34.71N 146 35.47W 23.2 1.6 0.24 0.88 2.44 74 18 8 37 A E PR WILLIAM SOUND. 97 12 17 14 56 0.77 60 47.85N 150 46.58W 44.2 2.4 0.26 0.77 2.60 63 22 16 26 B E KENAI PEN. 97 12 17 17 18 3.65 61 41.60N 151 45.35W 97.7 3.3 0.24 1.47 1.36 50 17 10 34 A E COOK INLET. 97 12 17 18 31 27.46 50 58.20N 178 47.34E 33.0N 4.6mb R RAT ISLS. 97 12 17 19 19 34.74 61 40.51N 153 57.02W 10.0 2.5 0.31 3.76 5.84 88 17 10 95 C E COOK INLET. 97 12 17 19 55 41.72 59 24.91N 152 55.59W 95.3 2.3 0.25 1.48 3.47 75 18 13 26 B E COOK INLET. 97 12 17 21 31 49.25 61 25.43N 146 36.65W 8.9 1.0 0.14 0.65 3.37 81 11 4 36 B E PR WILLIAM SOUND. 97 12 17 23 14 43.01 60 52.08N 149 50.13W 28.2 2.8 0.30 0.76 3.72 40 25 17 36 B E KENAI PEN. 97 12 17 23 15 12.34 60 52.51N 149 49.56W 30.9 2.4 0.23 2.70 6.16 93 11 5 35 C E KENAI PEN. 97 12 18 1 59 47.89 61 29.05N 146 50.26W 19.3 1.6 0.24 0.75 3.50 60 16 10 47 B E PR WILLIAM SOUND. 97 12 18 3 17 5.91 60 0.30N 151 49.59W 59.2 2.0 0.29 1.09 3.19 59 23 18 30 B E KENAI PEN. 97 12 18 7 37 17.51 58 49.13N 154 7.11W 92.6 2.4 0.13 2.67 5.55 117 18 7 30 C E ALASKA PEN. 97 12 18 7 56 50.29 61 32.06N 147 52.15W 34.3 2.2 0.33 0.67 2.15 47 20 15 34 A E PR WILLIAM SOUND. 97 12 18 7 59 31.45 60 5.97N 153 21.62W 134.4 2.3 0.24 2.43 3.12 80 18 10 13 B E COOK INLET. 97 12 18 9 24 43.78 54 4.97N 164 3.74W 10.0 4.0 0.29 2.50 2.95 215 16 6 70 B E UNIMAK IS. 97 12 18 9 40 28.33 62 30.11N 149 46.60W 60.7 1.9 0.19 5.26 6.72 120 16 5 28 C E CENTRAL AK. 97 12 18 10 8 55.80 60 10.28N 152 52.81W 115.9 3.0 0.29 1.30 2.36 66 36 10 11 A E COOK INLET. 97 12 18 10 22 10.39 51 20.04N 179 23.22W 33.0N 4.3mb R ANDREANOF ISLS. 97 12 18 13 27 11.18 61 29.20N 149 54.40W 38.2 1.9 0.30 1.55 2.87 54 19 9 18 B E COOK INLET. 97 12 18 16 49 2.97 58 13.34N 156 2.13W 151.4 2.9 0.14 6.87 11.41 138 18 3 10 D E ALASKA PEN. 97 12 18 19 3 48.66 60 16.85N 152 33.39W 100.2 2.7 0.27 2.08 2.81 88 31 14 25 B E COOK INLET. 97 12 19 12 14 29.00 51 9.60N 178 55.80E 33.0N 4.8mb R RAT ISLS. 97 12 19 12 26 31.26 61 34.18N 151 34.87W 71.8 2.0 0.13 2.73 4.77 124 13 5 36 B E COOK INLET. 97 12 19 18 33 12.18 63 29.57N 150 42.17W 12.7 2.1 0.30 5.59 5.30 190 9 7 79 C E CENTRAL AK. 97 12 19 18 37 38.32 54 21.44N 162 24.98W 7.5 2.0 0.31 13.67 15.54 270 9 3 69 D E ALASKA PEN. 97 12 19 20 18 47.79 60 47.10N 147 22.05W 26.9 1.7 0.21 1.58 2.33 156 11 8 18 A E PR WILLIAM SOUND. 97 12 19 21 14 14.48 62 52.57N 149 58.58W 88.7 2.2 0.11 3.17 3.56 96 20 7 21 B E CENTRAL AK. 97 12 19 22 12 54.33 62 46.34N 149 39.73W 76.2 2.5 0.22 3.56 4.30 58 16 8 23 B E CENTRAL AK. 97 12 19 22 51 46.00 51 44.40N 179 3.00E 33.0N 4.5mb R RAT ISLS. 97 12 19 23 17 12.08 59 30.38N 153 11.15W 99.8 2.7 0.14 2.68 2.68 124 24 12 16 B E COOK INLET. 97 12 19 23 49 43.27 59 53.15N 153 14.37W 116.9 2.4 0.25 2.02 4.11 66 24 7 12 B E COOK INLET. 97 12 20 5 35 0.78 63 20.62N 145 16.30W 3.9 2.7 0.23 0.84 1.48 86 15 7 25 A E E CENTRAL AK. 97 12 20 6 8 36.93 64 40.92N 148 17.58W 12.6 1.5 0.28 0.61 2.30 76 12 9 25 A E CENTRAL AK. 97 12 20 11 25 41.37 61 57.84N 148 26.24W 30.4 1.8 0.16 2.29 4.27 58 18 8 18 B E PR WILLIAM SOUND. 97 12 20 12 48 6.01 59 45.73N 152 44.24W 101.2 2.9 0.18 1.12 2.36 53 25 18 29 A E COOK INLET. 97 12 20 13 26 55.85 60 0.87N 152 15.07W 83.5 2.4 0.27 2.30 4.25 62 20 9 40 B E COOK INLET. 97 12 20 14 49 15.58 64 0.49N 148 43.79W 121.3 2.3 0.13 2.06 4.23 53 16 9 32 B E CENTRAL AK. 97 12 20 21 9 57.25 60 9.68N 151 14.20W 58.7 1.5 0.19 4.49 7.68 86 18 8 13 C E KENAI PEN. 97 12 20 22 18 18.64 62 38.01N 148 41.78W 47.7 2.5 0.20 1.64 7.47 58 17 7 61 C E CENTRAL AK. 97 12 21 1 18 21.19 61 28.79N 146 44.17W 8.0 1.6 0.13 2.76 5.23 63 18 4 43 C E PR WILLIAM SOUND. 97 12 21 1 29 57.91 60 59.13N 146 35.97W 20.8 1.6 0.23 1.31 1.68 52 16 5 8 A E PR WILLIAM SOUND. 97 12 21 9 2 57.33 61 40.81N 146 51.57W 31.1 1.7 0.32 1.21 2.91 59 18 6 30 B E PR WILLIAM SOUND. 97 12 21 10 5 58.00 60 59.36N 149 44.16W 35.1 1.4 0.10 2.54 4.77 67 20 4 30 B E KENAI PEN. 97 12 21 12 38 55.88 64 59.21N 148 25.56W 13.7 2.0 0.32 1.20 1.31 94 15 9 10 A E CENTRAL AK. 97 12 21 13 50 21.98 61 44.32N 146 52.91W 49.2 1.1 0.26 3.00 4.04 108 14 6 26 B E PR WILLIAM SOUND. 97 12 21 18 20 55.92 63 18.31N 151 6.14W 9.9 3.4 0.28 3.75 5.14 103 21 6 82 C E CENTRAL AK.