Issued: January 4, 1999 Prepared by: Nan Macgregor-Scott No. 51 - 98 The following is a list of significant earthquakes during the time period December 21 - 27, 1998 December 21 at 10:04 UTC (01:04 am AST), mb 4.1, 51 N 55Õ, 179 W 31Õ, depth = 127 km (79 mi): A light earthquake was located by NEIC in the Andreanof Islands region of Alaska about 69 mi (111 km) ENE of Amchitka 123 mi (198 km) W of Adak 196 mi (316 km) E of Buldir Is 228 mi (367 km) W of Atka 275 mi (443 km) E of Shemya Is December 21 at 13:10 UTC (04:10 am AST), mb 3.9, 51 N 15Õ, 176 W 22Õ, depth fixed at 33 km (21 mi): A minor earthquake was located by NEIC in the Andreanof Islands region of Alaska about 46 mi ( 73 km) SSE of Adak 114 mi (183 km) SW of Atka 202 mi (325 km) E of Amchitka 202 mi (325 km) WSW of Amukta Pass 339 mi (546 km) E of Buldir Is December 22 at 05:44 UTC (08:44 pm AST), ML 3.8, 59 N 59Õ, 152 W 13Õ, depth = 65 km (41 mi): A minor earthquake, felt in Homer, was located in the Cook Inlet region of Alaska about 20 mi ( 32 km) WSW of Ninilchik 20 mi ( 32 km) NW of Anchor Point 33 mi ( 53 km) WSW of Clam Gulch 34 mi ( 54 km) NW of Homer 41 mi ( 66 km) SW of Kasilof December 22 at 12:28 UTC (03:28 am AST), ML 4.6, 53 N 57Õ, 145 W 22Õ, depth = 10 km (6 mi): A light earthquake was located south of Alaska about 381 mi (614 km) SE of Kodiak 383 mi (616 km) S of Middleton Island 384 mi (618 km) ESE of Old Harbor 390 mi (628 km) SE of Ouzinkie 398 mi (641 km) SE of Port Lions December 26 at 03:56 UTC (06:56 pm AST), ML 3.5, 53 N 23Õ, 164 W 5Õ, depth = 0 km (0 mi): A minor earthquake was located in the Unimak Island region of Alaska about 87 mi (140 km) SE of Akutan 105 mi (169 km) SSW of False Pass 106 mi (171 km) ESE of Dutch Harbor 107 mi (172 km) ESE of Unalaska 136 mi (219 km) SSW of Cold Bay December 26 at 06:18 UTC (09:18 pm AST), ML 3.5, 61 N 24Õ, 146 W 12Õ, depth = 32 km (20 mi): A minor earthquake, felt in Valdez, was located in the Prince William Sound region of Alaska about 20 mi ( 33 km) NNE of Valdez 23 mi ( 37 km) NW of Thompson Pass 35 mi ( 57 km) W of Pump Station #12 41 mi ( 67 km) NNE of Tatitlek 48 mi ( 77 km) SW of Copper Center _____________________________________________________________________________________________________________________________________________________ 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 _____________________________________________________________________________________________________________________________________________________ 98 12 21 5 37 20.66 62 45.64N 149 9.26W 72.2 2.7 0.18 1.06 3.23 79 18 4 34 B E CENTRAL AK. 98 12 21 5 41 8.46 59 40.38N 151 45.21W 58.6 2.1 0.21 3.10 4.81 78 23 18 6 B E KENAI PEN. 98 12 21 5 50 11.75 60 30.27N 143 4.87W 12.9 2.2 0.14 1.78 1.61 95 16 7 14 A E CAPE YAKATAGA. 98 12 21 7 9 31.25 66 22.14N 149 52.79W 24.4 2.5 0.77 16.31 21.33 247 11 8 154 D E N CENTRAL AK. 98 12 21 7 22 4.35 60 22.11N 145 10.01W 7.1 1.2 0.24 8.38 5.28 134 14 5 19 C E PR WILLIAM SOUND. 98 12 21 7 39 22.66 61 42.26N 150 42.75W 52.7 1.4 0.13 5.50 9.60 102 12 5 45 C E COOK INLET. 98 12 21 8 7 37.48 61 23.05N 146 44.01W 20.1 1.1 0.09 1.79 31.37 58 14 5 35 D E PR WILLIAM SOUND. 98 12 21 9 58 58.28 63 13.85N 150 19.21W 106.8 1.8 0.12 7.35 11.86 88 11 3 25 D E CENTRAL AK. 98 12 21 10 4 17.41 51 54.78N 179 31.26W 127.2 4.1mb R ANDREANOF ISLS. 98 12 21 10 28 10.80 62 6.26N 150 14.93W 58.2 0.4 0.24 12.08 24.87 125 7 3 33 D E CENTRAL AK. 98 12 21 13 10 57.57 51 14.52N 176 21.60W 33.0N 3.9mb R ANDREANOF ISLS. 98 12 21 13 46 51.53 60 17.62N 148 38.78W 20.5 2.8 0.09 3.63 6.31 97 12 4 45 C E KENAI PEN. 98 12 21 17 25 33.16 62 56.11N 150 27.77W 98.1 1.4 0.25 10.30 9.84 96 14 3 42 D E CENTRAL AK. 98 12 21 17 32 59.77 63 29.55N 151 11.39W 7.3 3.2 0.36 2.55 2.18 109 16 5 15 B E CENTRAL AK. 98 12 21 17 36 47.01 59 36.06N 151 48.66W 88.4 0.0 R KENAI PEN. 98 12 21 17 36 47.54 59 35.81N 151 38.95W 3.8 2.9 0.25 9.62 10.11 118 11 5 114 D E KENAI PEN. 98 12 21 19 51 5.47 60 32.93N 151 25.37W 55.0 3.1 0.29 1.50 3.93 69 13 3 24 B E KENAI PEN. 98 12 21 20 18 31.45 59 14.84N 153 35.16W 99.3 1.9 0.08 5.37 10.63 114 10 5 13 D E COOK INLET. 98 12 21 20 57 27.75 60 20.99N 151 2.00W 34.8 1.8 0.13 1.35 12.23 93 9 3 37 D E KENAI PEN. 98 12 21 20 59 40.02 62 52.76N 151 5.07W 102.4 1.6 0.25 16.17 17.22 93 12 3 67 D E CENTRAL AK. 98 12 21 21 22 14.01 63 16.63N 151 5.07W 11.0 2.1 0.14 2.21 1.49 76 11 5 32 A E CENTRAL AK. 98 12 21 22 32 27.23 62 25.15N 148 11.70W 22.7 2.5 0.20 0.87 3.45 43 19 6 68 B E CENTRAL AK. 98 12 22 5 44 17.74 59 59.14N 152 13.05W 65.2 3.8 0.24 0.71 2.34 50 22 7 43 A E COOK INLET. 98 12 22 5 54 55.04 59 58.04N 152 14.98W 72.9 2.2 0.22 1.48 3.76 51 19 15 42 B E COOK INLET. 98 12 22 6 21 46.14 59 58.45N 152 14.39W 66.6 2.1 0.23 1.22 2.95 79 16 13 42 B E COOK INLET. 98 12 22 7 26 44.04 61 25.98N 148 31.24W 35.2 1.3 0.21 1.04 1.92 43 17 10 4 A E PR WILLIAM SOUND. 98 12 22 7 27 33.56 60 21.59N 147 41.06W 11.6 1.0 0.14 2.97 5.98 109 10 2 37 C E PR WILLIAM SOUND. 98 12 22 7 41 27.45 60 25.24N 147 45.03W 14.7 1.1 0.08 0.90 6.96 96 9 5 43 C E PR WILLIAM SOUND. 98 12 22 9 27 4.97 60 2.84N 150 46.36W 39.8 2.4 0.19 1.44 3.65 135 16 12 29 B E KENAI PEN. 98 12 22 9 52 14.16 64 36.04N 148 8.26W 4.8 1.2 0.18 1.56 9.32 61 13 6 15 C E CENTRAL AK. 98 12 22 10 13 8.69 62 1.67N 148 29.29W 38.1 2.5 0.26 1.04 2.15 116 14 13 26 A E CENTRAL AK. 98 12 22 12 12 8.14 61 5.33N 151 9.01W 51.2 1.5 0.21 2.70 5.47 67 18 12 39 C E COOK INLET. 98 12 22 12 28 36.18 53 57.12N 145 22.03W 10.0G 4.6 0.83 99.00 98.95 297 16 1 613 D E SOUTH OF AK. 98 12 22 13 25 34.64 57 46.88N 156 8.07W 115.3 3.4 0.16 5.37 3.79 145 16 16 56 C E ALASKA PEN. 98 12 22 16 10 19.91 59 53.73N 152 34.70W 83.2 2.3 0.26 1.33 2.43 58 24 20 28 A E COOK INLET. 98 12 22 16 20 0.53 55 50.62N 161 30.88W 161.8 3.2 0.21 4.05 6.43 103 15 4 38 C E ALASKA PEN. 98 12 22 16 49 55.81 59 49.61N 151 51.27W 55.4 2.3 0.27 1.12 2.75 50 24 15 22 B E KENAI PEN. 98 12 22 18 9 55.63 61 24.21N 147 26.99W 29.8 1.2 0.11 0.79 3.46 75 15 8 30 B E PR WILLIAM SOUND. 98 12 22 22 12 31.87 61 52.26N 147 50.98W 29.7 1.3 0.29 1.42 2.16 74 14 8 26 A E PR WILLIAM SOUND. 98 12 22 22 45 56.07 61 43.33N 147 6.91W 33.7 1.5 0.27 1.67 2.78 63 16 9 17 B E PR WILLIAM SOUND. 98 12 22 22 53 16.19 61 18.24N 150 39.17W 53.5 2.6 0.18 1.10 5.30 101 19 12 70 C E COOK INLET. 98 12 22 23 44 26.84 60 32.98N 148 28.96W 7.2 1.6 0.22 1.25 2.48 90 15 9 35 A E KENAI PEN. 98 12 23 3 33 18.95 60 21.27N 149 58.73W 29.6 2.2 0.21 2.34 3.35 112 14 8 22 B E KENAI PEN. 98 12 23 5 0 13.32 60 53.87N 149 9.65W 30.0 1.9 0.11 0.84 3.68 51 18 6 44 B E KENAI PEN. 98 12 23 5 1 46.60 59 49.85N 152 7.88W 77.0 2.3 0.31 2.39 4.00 62 28 17 34 B E COOK INLET. 98 12 23 6 7 28.92 62 49.67N 150 30.06W 90.5 3.1 0.16 1.78 3.26 71 20 8 47 B E CENTRAL AK. 98 12 23 7 12 26.46 61 18.20N 152 14.23W 1.4 1.6 0.08 0.39 1.10 138 21 8 4 A a COOK INLET. 98 12 23 7 30 12.40 59 54.49N 153 22.36W 135.4 2.5 0.27 16.39 6.75 92 23 14 18 D E COOK INLET. 98 12 23 9 6 45.52 60 3.12N 152 58.56W 108.9 1.9 0.28 11.95 10.94 157 17 7 3 D E COOK INLET. 98 12 23 10 27 10.79 61 43.54N 148 52.76W 36.7 1.4 0.32 4.80 5.70 97 16 12 6 C E PR WILLIAM SOUND. _____________________________________________________________________________________________________________________________________________________ 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 _____________________________________________________________________________________________________________________________________________________ 98 12 23 11 33 43.32 61 45.43N 150 33.15W 43.4 2.2 0.37 4.86 11.77 74 20 12 38 D E COOK INLET. 98 12 23 12 26 49.38 60 6.66N 149 9.53W 32.1 2.3 0.17 2.87 7.36 146 16 9 44 C E KENAI PEN. 98 12 23 15 13 45.79 61 45.50N 149 35.01W 35.6 1.9 0.36 2.93 3.80 111 15 11 20 B E COOK INLET. 98 12 23 15 24 14.94 60 3.05N 152 57.60W 110.2 3.2 0.28 3.00 2.94 79 18 15 3 B E COOK INLET. 98 12 23 17 30 59.35 58 11.34N 155 16.63W 1.2 0.6 0.08 0.75 2.96 90 8 6 4 B a ALASKA PEN. 98 12 23 18 0 12.99 61 19.67N 146 25.12W 21.4 1.2 0.19 3.88 5.63 70 15 6 22 C E PR WILLIAM SOUND. 98 12 23 20 52 50.46 60 21.33N 153 11.67W 138.0 2.6 0.07 3.70 7.42 94 14 4 24 C E COOK INLET. 98 12 23 21 59 6.16 61 41.36N 150 3.25W 49.3 1.8 0.20 4.27 7.86 97 12 6 10 C E COOK INLET. 98 12 23 22 54 55.37 58 13.89N 155 10.21W 4.7 1.1 0.13 0.66 1.65 81 14 7 5 A a ALASKA PEN. 98 12 23 23 20 20.64 61 15.60N 149 42.52W 43.7 1.5 0.14 6.04 5.57 81 12 5 8 C E COOK INLET. 98 12 23 23 54 21.51 58 33.62N 150 46.26W 14.9 3.1 0.22 8.91 21.28 162 13 4 94 D E GULF OF ALASKA. 98 12 24 0 23 18.91 64 43.37N 147 56.54W 12.7 1.3 0.22 2.20 2.39 79 7 4 11 A E CENTRAL AK. 98 12 24 2 7 58.22 54 38.00N 159 56.08W 0.0 3.3 0.43 9.89 6.37 249 17 11 41 C E SOUTH OF AK. 98 12 24 2 23 5.91 61 44.45N 149 46.05W 36.7 2.0 0.25 2.71 3.36 103 15 7 12 B E COOK INLET. 98 12 24 2 50 59.89 65 35.86N 151 9.48W 74.4 2.3 0.41 20.49 28.09 292 6 4 150 D E N CENTRAL AK. 98 12 24 8 57 25.44 61 51.50N 146 43.71W 34.6 1.4 0.28 2.81 3.40 60 16 6 32 B E PR WILLIAM SOUND. 98 12 24 13 56 10.33 60 59.79N 147 9.69W 27.8 1.5 0.20 1.31 1.49 81 14 7 14 A E PR WILLIAM SOUND. 98 12 24 14 46 15.79 63 27.78N 145 31.39W 7.3 2.2 0.28 1.24 2.05 81 17 6 13 A E E CENTRAL AK. 98 12 24 15 38 29.32 58 47.15N 142 47.25W 10.0G 2.8 0.18 20.91 79.15 228 15 1 146 D E GULF OF ALASKA. 98 12 24 16 10 7.16 60 46.20N 150 47.74W 61.1 2.7 0.39 1.33 3.17 51 21 15 24 B E KENAI PEN. 98 12 24 16 21 44.87 59 13.22N 153 0.44W 77.1 2.4 0.37 1.43 2.90 82 18 15 27 B E COOK INLET. 98 12 24 19 39 33.44 64 25.89N 147 15.52W 13.9 1.8 0.27 1.12 1.68 116 12 8 15 A E CENTRAL AK. 98 12 24 21 36 32.03 59 49.14N 152 40.97W 80.4 3.3 0.23 0.99 2.11 62 20 18 27 A E COOK INLET. 98 12 24 22 54 47.84 63 22.58N 147 47.07W 79.1 2.3 0.25 1.49 2.93 129 17 12 39 B E CENTRAL AK. 98 12 24 23 32 20.73 61 30.45N 151 38.19W 76.3 1.5 0.23 5.03 3.93 147 15 7 30 C E COOK INLET. 98 12 25 1 39 20.25 59 48.85N 153 2.64W 103.0 2.1 0.15 2.79 3.54 87 22 15 16 B E COOK INLET. 98 12 25 1 44 22.10 59 57.89N 153 3.84W 3.5 0.6 0.24 3.08 1.91 170 7 4 1 B a COOK INLET. 98 12 25 2 4 32.10 62 21.85N 151 10.43W 81.8 2.3 0.13 3.77 6.88 79 18 5 47 C E CENTRAL AK. 98 12 25 3 5 4.37 61 31.98N 151 12.52W 14.9 1.9 0.30 0.97 2.99 184 24 8 41 B E COOK INLET. 98 12 25 3 41 42.32 59 35.32N 152 41.77W 80.1 2.1 0.26 1.95 3.60 77 22 14 31 B E COOK INLET. 98 12 25 4 32 14.76 61 29.68N 150 19.29W 46.9 1.9 0.26 1.79 3.90 61 25 6 29 B E COOK INLET. 98 12 25 4 49 26.71 61 29.33N 146 33.71W 5.3 1.6 0.27 1.45 2.77 63 18 6 34 B E PR WILLIAM SOUND. 98 12 25 7 53 30.38 53 39.55N 165 9.31W 11.0 2.8 0.34 3.23 2.60 239 21 14 62 B E FOX ISLS. 98 12 25 8 14 53.54 60 42.84N 147 48.83W 23.9 0.7 0.16 4.92 4.03 190 12 5 33 B E PR WILLIAM SOUND. 98 12 25 8 22 46.43 61 33.41N 149 52.23W 37.9 0.9 0.41 3.01 5.08 95 13 7 10 C E COOK INLET. 98 12 25 8 52 46.46 61 50.87N 149 35.13W 39.4 1.7 0.21 1.61 3.28 79 19 8 27 B E COOK INLET. 98 12 25 11 16 27.44 59 52.00N 151 9.24W 47.2 1.7 0.29 2.57 5.18 73 22 7 19 C E KENAI PEN. 98 12 25 13 11 21.13 61 21.25N 147 26.85W 30.9 0.9 0.17 1.33 4.33 72 16 8 26 B E PR WILLIAM SOUND. 98 12 25 14 18 45.75 59 59.65N 152 8.22W 50.9 1.8 0.21 3.15 10.69 67 14 4 47 D E COOK INLET. 98 12 25 14 21 31.44 62 15.70N 141 47.47W 6.1 2.3 0.34 10.12 11.37 197 14 5 133 D E E CENTRAL AK. 98 12 25 14 35 0.25 60 19.30N 152 31.77W 91.9 2.8 0.12 1.65 6.56 71 15 5 17 C E COOK INLET. 98 12 25 17 20 56.35 61 16.22N 151 44.64W 76.5 2.0 0.18 3.94 7.32 79 13 6 15 C E COOK INLET. 98 12 25 20 21 24.83 60 46.32N 151 49.63W 69.6 1.9 0.17 8.12 9.42 63 11 3 32 C E KENAI PEN. 98 12 25 21 25 58.10 63 29.12N 151 14.28W 5.1 3.1 0.17 2.90 4.34 81 15 3 17 B E CENTRAL AK. 98 12 25 22 19 6.91 63 23.21N 151 30.03W 13.4 3.0 0.16 4.68 1.90 82 12 3 34 B E CENTRAL AK. 98 12 26 0 39 31.73 61 35.97N 146 24.92W 21.9 1.5 0.31 1.00 2.65 74 19 9 29 B E PR WILLIAM SOUND. 98 12 26 1 9 25.89 60 27.61N 152 25.14W 86.0 1.9 0.27 4.60 3.94 68 15 9 16 B E COOK INLET. 98 12 26 1 28 50.66 64 51.48N 148 59.26W 10.3 1.6 0.36 2.89 5.99 140 12 5 32 C E CENTRAL AK. 98 12 26 1 58 19.87 61 40.39N 149 29.72W 30.8 1.3 0.21 1.50 2.64 96 15 8 20 B E COOK INLET. 98 12 26 3 56 27.80 53 23.14N 164 4.57W 0.0 3.5 0.31 13.91 17.66 219 17 10 126 D E UNIMAK IS. _____________________________________________________________________________________________________________________________________________________ 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 _____________________________________________________________________________________________________________________________________________________ 98 12 26 6 18 33.76 61 24.48N 146 11.59W 31.6 3.5 0.25 0.77 1.33 56 17 9 17 A E PR WILLIAM SOUND. 98 12 26 11 16 8.71 53 35.77N 165 44.85W 57.0 3.0 0.19 8.31 10.04 250 17 16 57 D E FOX ISLS. 98 12 26 14 59 28.79 60 53.15N 147 31.04W 22.8 2.2 0.24 0.77 1.56 113 15 8 23 A E PR WILLIAM SOUND. 98 12 26 16 22 38.91 60 18.34N 147 53.30W 7.8 1.6 0.21 2.86 5.06 197 13 7 66 C E PR WILLIAM SOUND. 98 12 26 16 56 31.73 58 9.68N 143 12.31W 10.0G 2.9 0.30 8.61 24.20 168 17 5 209 D E GULF OF ALASKA. 98 12 26 17 45 55.44 58 33.15N 152 12.68W 41.6 2.6 0.36 3.37 3.12 135 16 12 12 B E KODIAK IS REG. 98 12 26 19 12 32.39 60 33.41N 142 42.28W 15.9 1.0 0.31 1.55 2.00 69 11 6 15 A E CAPE YAKATAGA. 98 12 26 23 8 33.19 61 27.42N 146 40.07W 11.1 1.4 0.19 1.19 2.51 59 16 7 40 A E PR WILLIAM SOUND. 98 12 27 2 6 17.80 61 49.73N 148 8.75W 31.1 1.3 0.13 2.22 3.18 111 10 3 10 B E PR WILLIAM SOUND. 98 12 27 2 12 58.36 62 55.16N 148 43.91W 61.2 2.6 0.24 1.33 3.96 81 14 6 46 B E CENTRAL AK. 98 12 27 6 5 17.60 63 23.27N 149 54.36W 115.4 2.0 0.14 7.89 9.51 76 11 3 20 C E CENTRAL AK. 98 12 27 6 10 13.01 63 17.46N 151 10.59W 6.8 1.4 0.31 6.65 9.81 103 10 4 32 C E CENTRAL AK. 98 12 27 6 25 32.88 60 7.53N 153 27.51W 157.5 2.1 0.09 8.08 10.00 86 12 3 23 D E COOK INLET. 98 12 27 6 27 10.98 53 28.06N 165 47.50W 23.4 2.1 0.30 8.83 13.21 263 17 9 71 D E FOX ISLS. 98 12 27 12 48 34.62 59 54.94N 150 43.98W 36.8 2.0 0.15 6.00 7.65 107 14 4 19 C E KENAI PEN. 98 12 27 15 49 44.46 58 10.57N 155 19.53W 0.0 1.4 0.13 0.66 3.63 59 14 5 4 B a ALASKA PEN. 98 12 27 16 28 26.57 61 16.72N 141 27.60W 0.0 1.8 0.29 6.05 2.34 164 15 5 35 C E CAPE YAKATAGA. 98 12 27 16 33 24.41 58 10.39N 155 18.85W 0.0 0.1 0.07 3.47 88.30 85 6 6 4 D a ALASKA PEN. 98 12 27 17 41 20.74 60 39.05N 143 2.72W 9.5 1.8 0.32 1.43 1.11 75 14 5 12 A E CAPE YAKATAGA. 98 12 27 19 56 14.58 59 48.26N 153 23.78W 121.1 1.9 0.13 6.77 11.18 80 12 4 19 D E COOK INLET. 98 12 27 21 55 0.79 62 16.39N 151 28.18W 87.5 2.3 0.23 4.54 6.44 81 15 3 33 C E CENTRAL AK. 98 12 27 22 29 9.32 61 24.21N 146 53.55W 11.4 2.0 0.17 2.45 4.69 72 15 5 42 B E PR WILLIAM SOUND. 98 12 27 23 7 45.39 61 20.05N 146 48.15W 16.5 1.6 0.09 1.05 3.62 67 15 3 33 B E PR WILLIAM SOUND.