Issued: March 23, 1998 Prepared by: Nan Macgregor-Scott No. 10 - 98 The following is a list of significant earthquakes during the time period March 16 - 22, 1998 March 17 at 21:45 UTC (12:45 pm AST), ML 4.3, 55 N 14Õ, 160 W 57Õ, depth = 67 km (41 mi): A light earthquake was located in the Alaska Peninsula region of Alaska about 20 mi ( 31 km) WSW of Sand Point 54 mi ( 87 km) S of Nelson Lagoon 55 mi ( 89 km) ENE of King Cove 70 mi (113 km) E of Cold Bay 85 mi (137 km) WSW of Perryville March 18 at 02:45 UTC (05:45 pm AST), ML 3.7, 55 N 19Õ, 162 W 24Õ, depth = 153 km (95 mi): A minor earthquake was located in the Alaska Peninsula region of Alaska about 16 mi ( 25 km) NE of Cold Bay 18 mi ( 29 km) NNW of King Cove 51 mi ( 83 km) NE of False Pass 67 mi (108 km) SW of Nelson Lagoon 75 mi (121 km) W of Sand Point March 20 at 03:29 UTC (06:29 pm AST), ML 3.5, 62 N 15Õ, 152 W 22Õ, depth = 0 km (0 mi): A minor earthquake was located in the central region of Alaska about 44 mi ( 70 km) WNW of Skwentna 73 mi (118 km) W of Talkeetna 84 mi (135 km) WNW of Willow 91 mi (147 km) NNW of Tyonek 99 mi (160 km) SSW of Kantishna March 20 at 05:56 UTC (08:56 pm AST), mb 4.5, 51 N 17Õ, 176 W 45Õ, depth fixed at 33 km (21 mi): A light earthquake was located by NEIC in the Andreanof Islands region of Alaska about 41 mi ( 66 km) S of Adak 126 mi (203 km) WSW of Atka 185 mi (297 km) E of Amchitka 217 mi (349 km) WSW of Amukta Pass 322 mi (519 km) E of Buldir Is March 20 at 15:59 UTC (06:59 am AST), ML 3.8, 54 N 43Õ, 161 W 18Õ, depth = 0 km (0 mi): A minor earthquake was located in the Alaska Peninsula region of Alaska about 47 mi ( 75 km) ESE of King Cove 53 mi ( 86 km) SW of Sand Point 65 mi (105 km) ESE of Cold Bay 85 mi (137 km) E of False Pass 89 mi (143 km) S of Nelson Lagoon March 21 at 06:08 UTC (09:08 pm AST), ML 3.5, 63 N 32Õ, 150 W 56Õ, depth = 10 km (6 mi): A minor earthquake was located in the central region of Alaska about 1 mi ( 1 km) ENE of Kantishna 49 mi ( 79 km) ESE of Lake Minchumina 62 mi (100 km) W of Cantwell 63 mi (101 km) W of Denali Park 65 mi (104 km) WSW of Healy _____________________________________________________________________________________________________________________________________________________ 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 3 16 0 4 9.77 59 59.45N 153 48.57W 146.3 3.2 0.21 3.69 6.34 92 30 3 31 C E COOK INLET. 98 3 16 1 26 31.29 61 54.43N 150 54.83W 0.0 3.0 0.16 1.00 1.61 65 19 3 62 A E COOK INLET. 98 3 16 2 31 27.90 59 47.54N 152 21.73W 64.8 2.3 0.21 3.15 6.72 47 14 7 43 C E COOK INLET. 98 3 16 4 41 51.96 60 29.62N 147 22.64W 11.2 1.5 0.13 2.33 3.56 54 17 7 46 B E PR WILLIAM SOUND. 98 3 16 5 36 14.71 62 35.48N 149 26.77W 61.0 2.4 0.19 1.80 3.76 52 15 4 44 B E CENTRAL AK. 98 3 16 11 58 17.94 60 3.32N 152 28.91W 74.8 2.0 0.20 5.26 7.42 70 14 3 27 C E COOK INLET. 98 3 16 14 15 57.56 61 46.50N 149 29.96W 47.6 2.1 0.13 1.85 2.28 76 13 4 24 A E COOK INLET. 98 3 16 15 22 51.29 61 48.02N 150 7.16W 5.7 1.0 0.32 4.88 7.71 105 8 4 21 C E COOK INLET. 98 3 16 15 22 33.23 57 40.54N 142 51.68W 10.0G 2.5 0.38 36.33 50.20 268 12 5 266 D E GULF OF ALASKA. 98 3 16 19 55 25.52 63 4.88N 151 6.23W 9.9 2.2 0.18 5.08 5.11 97 23 5 53 C E CENTRAL AK. 98 3 16 20 52 31.01 61 0.71N 146 36.63W 20.5 1.4 0.21 4.23 2.03 75 15 5 5 B E PR WILLIAM SOUND. 98 3 16 21 24 26.48 63 23.66N 150 23.62W 134.8 2.0 0.11 5.13 5.98 59 11 5 8 C E CENTRAL AK. 98 3 17 6 36 34.62 64 40.08N 148 7.60W 19.4 1.3 0.27 0.99 1.63 83 12 11 22 A E CENTRAL AK. 98 3 17 6 36 41.73 61 28.87N 151 57.72W 6.8 0.4 0.07 2.97 6.11 317 6 4 14 C a COOK INLET. 98 3 17 8 51 55.99 65 13.27N 148 31.21W 5.1 1.9 0.28 2.59 4.56 144 11 7 32 B E N CENTRAL AK. 98 3 17 10 38 8.24 59 25.65N 151 56.26W 75.9 2.2 0.30 2.85 3.27 163 16 14 15 B E KENAI PEN. 98 3 17 13 18 5.31 60 16.19N 150 57.48W 38.1 2.4 0.26 0.79 1.46 74 24 20 31 A E KENAI PEN. 98 3 17 17 2 10.71 61 10.70N 146 20.40W 36.5 1.2 0.18 1.47 1.42 100 13 8 5 A E PR WILLIAM SOUND. 98 3 17 19 21 8.18 60 3.48N 142 50.71W 18.3 2.4 0.21 2.05 1.22 189 15 10 14 A E CAPE YAKATAGA. 98 3 17 21 45 35.26 55 13.99N 160 57.07W 66.7 4.3 0.28 2.09 2.83 184 15 9 31 B E ALASKA PEN. 98 3 18 2 45 7.60 55 18.91N 162 24.06W 152.7 3.7 0.15 4.03 7.57 144 14 5 21 C E ALASKA PEN. 98 3 18 7 42 40.20 61 15.48N 146 46.86W 30.7 2.1 0.13 1.78 3.66 60 18 5 25 B E PR WILLIAM SOUND. 98 3 18 9 26 30.29 60 32.74N 151 8.17W 10.0 1.5 0.14 2.26 9.78 61 19 3 23 C E KENAI PEN. 98 3 18 11 39 37.69 60 38.90N 151 4.38W 43.2 1.6 0.14 4.43 11.19 90 10 4 14 D E KENAI PEN. 98 3 18 18 47 13.56 63 13.88N 150 27.46W 127.2 2.4 0.24 3.00 4.67 62 14 4 26 B E CENTRAL AK. 98 3 18 20 51 40.14 61 52.72N 147 35.60W 36.2 1.5 0.17 5.15 4.27 71 18 5 15 C E PR WILLIAM SOUND. 98 3 18 23 28 26.57 65 11.92N 148 28.22W 15.2 1.7 0.37 5.66 4.80 101 14 6 29 C E N CENTRAL AK. 98 3 19 3 53 1.53 65 12.30N 148 25.90W 13.2 2.5 0.28 2.37 1.51 111 15 9 29 A E N CENTRAL AK. 98 3 19 4 15 44.79 65 9.03N 148 26.78W 13.0 1.8 0.27 2.45 2.25 99 11 3 24 A E N CENTRAL AK. 98 3 19 4 16 25.30 63 31.04N 147 36.32W 12.8 2.8 0.24 0.70 1.02 52 16 11 51 A E CENTRAL AK. 98 3 19 8 11 22.75 60 7.01N 152 33.54W 86.4 2.1 0.28 1.40 3.02 78 22 13 23 B E COOK INLET. 98 3 19 11 16 44.02 63 21.87N 151 33.10W 35.4 3.1 0.27 1.88 1.57 81 19 8 38 A E CENTRAL AK. 98 3 19 14 36 17.05 60 53.33N 146 38.29W 20.2 2.5 0.35 0.77 1.38 56 17 9 18 A E PR WILLIAM SOUND. 98 3 19 14 36 26.38 63 4.74N 148 49.75W 86.1 1.6 0.36 5.03 5.73 162 15 4 42 C E CENTRAL AK. 98 3 19 15 27 1.77 60 1.63N 153 4.50W 0.0 -0.4 0.06 1.89 17.77 128 6 4 2 D a COOK INLET. 98 3 19 16 21 47.67 61 36.10N 151 35.35W 85.4 2.6 0.16 2.92 3.63 75 18 9 40 B E COOK INLET. 98 3 19 17 23 52.99 60 50.08N 151 33.93W 9.3 2.7 0.27 0.66 1.18 54 23 14 21 A E KENAI PEN. 98 3 19 19 33 14.38 61 22.96N 146 38.39W 35.9 1.4 0.22 1.37 3.13 77 15 9 32 B E PR WILLIAM SOUND. 98 3 19 19 54 53.72 63 13.22N 149 48.37W 101.9 2.2 0.18 1.18 2.20 72 19 10 28 A E CENTRAL AK. 98 3 19 21 49 2.04 60 38.32N 151 41.59W 71.4 1.9 0.23 2.06 3.58 47 22 14 27 B E KENAI PEN. 98 3 19 21 57 48.91 62 56.05N 151 14.45W 123.8 2.2 0.16 3.72 5.46 94 15 10 71 C E CENTRAL AK. 98 3 19 23 13 19.15 62 8.13N 147 59.18W 30.3 1.3 0.22 1.98 4.78 91 13 6 41 B E CENTRAL AK. 98 3 19 23 23 46.29 60 27.23N 152 17.29W 99.7 2.2 0.28 1.93 3.01 61 16 11 23 B E COOK INLET. 98 3 20 0 10 24.74 61 18.30N 146 43.67W 23.2 1.7 0.11 1.45 5.65 54 13 5 29 C E PR WILLIAM SOUND. 98 3 20 0 17 10.73 61 31.49N 150 3.85W 37.8 2.1 0.27 5.59 9.74 85 14 5 17 C E COOK INLET. 98 3 20 1 33 21.84 62 1.26N 149 48.25W 39.4 1.7 0.21 4.11 11.05 57 13 5 41 D E CENTRAL AK. 98 3 20 3 29 16.45 62 14.67N 152 22.32W 0.0 3.5 0.41 5.26 14.04 58 16 3 106 D E CENTRAL AK. 98 3 20 4 6 49.47 60 32.87N 152 34.75W 10.9 2.2 0.14 2.28 2.86 77 13 4 8 B E COOK INLET. 98 3 20 4 18 44.82 61 28.14N 151 58.03W 5.0 0.5 0.02 7.51 4.29 312 3 3 12 C E COOK INLET. 98 3 20 4 18 55.56 62 10.96N 152 16.48W 3.6 2.1 0.29 7.35 11.06 89 13 5 87 D 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 _____________________________________________________________________________________________________________________________________________________ 98 3 20 5 56 8.06 51 17.04N 176 45.24W 33.0N 4.5mb R ANDREANOF ISLS. 98 3 20 6 3 39.97 60 57.85N 149 17.48W 38.8 1.5 0.14 3.96 5.73 77 14 7 18 C E KENAI PEN. 98 3 20 7 18 7.60 61 30.83N 146 21.17W 29.2 1.6 0.18 2.76 7.66 83 12 7 23 C E PR WILLIAM SOUND. 98 3 20 7 18 38.24 63 3.07N 151 38.29W 6.5 1.9 0.35 6.66 9.26 79 10 4 67 C E CENTRAL AK. 98 3 20 11 36 6.23 63 10.20N 150 35.57W 117.3 1.9 0.13 6.52 7.97 72 12 6 35 C E CENTRAL AK. 98 3 20 11 36 15.27 54 9.37N 164 3.61W 0.0 1.9 0.44 8.04 9.57 208 15 5 58 C E UNIMAK IS. 98 3 20 13 0 44.54 59 57.38N 149 3.93W 9.9 2.1 0.30 3.87 6.72 140 15 6 27 C E KENAI PEN. 98 3 20 13 45 24.40 54 9.49N 164 11.13W 7.8 3.3 0.46 8.54 9.36 210 15 8 63 C E UNIMAK IS. 98 3 20 14 23 4.53 64 46.67N 147 47.34W 15.6 0.4 0.09 4.41 7.71 112 5 5 11 C E CENTRAL AK. 98 3 20 14 49 5.68 61 11.07N 151 16.83W 61.2 1.8 0.28 6.44 14.08 83 12 3 41 D E COOK INLET. 98 3 20 14 52 33.88 59 44.50N 153 27.18W 124.1 2.3 0.11 10.92 11.09 73 13 4 16 D E COOK INLET. 98 3 20 15 19 57.82 63 16.06N 151 6.59W 11.6 2.9 0.22 1.88 2.38 76 15 4 33 A E CENTRAL AK. 98 3 20 15 59 55.99 54 43.40N 161 17.69W 0.0 3.8 0.35 5.82 3.01 222 16 2 60 C E ALASKA PEN. 98 3 20 16 1 5.97 61 54.09N 149 43.95W 15.0 1.1 0.11 6.04 12.92 124 8 4 45 D E COOK INLET. 98 3 20 17 18 52.72 59 58.06N 151 48.43W 40.3 2.3 0.14 4.08 7.30 62 13 4 30 C E KENAI PEN. 98 3 20 17 28 0.51 63 2.88N 149 39.80W 75.0 1.3 0.36 7.38 10.41 109 9 5 8 D E CENTRAL AK. 98 3 20 18 25 20.17 62 19.80N 149 11.63W 10.3 1.3 0.19 29.41 38.73 240 9 3 56 D E CENTRAL AK. 98 3 21 1 10 41.55 60 39.79N 150 25.78W 48.0 1.7 0.26 2.22 5.52 82 15 12 62 C E KENAI PEN. 98 3 21 2 21 16.77 64 31.91N 147 9.12W 0.0 1.3 0.10 0.67 38.75 108 14 6 17 D E CENTRAL AK. 98 3 21 4 18 17.15 62 53.23N 151 16.00W 104.9 2.0 0.13 5.13 6.97 119 15 5 74 C E CENTRAL AK. 98 3 21 6 8 16.46 63 31.55N 150 55.88W 10.4 3.5 0.45 1.12 0.87 167 17 5 3 A E CENTRAL AK. 98 3 21 6 10 11.27 58 12.87N 155 20.63W 0.0 0.4 0.08 8.23 74.03 256 5 3 1 D a ALASKA PEN. 98 3 21 7 37 46.15 63 25.90N 151 1.58W 9.3 2.6 0.27 2.21 1.99 105 19 8 15 A E CENTRAL AK. 98 3 21 9 27 30.04 61 4.18N 150 8.16W 42.0 1.8 0.24 1.58 3.85 86 16 11 37 B E COOK INLET. 98 3 21 10 2 19.93 60 18.28N 151 55.95W 82.6 2.5 0.31 1.31 2.79 65 17 13 46 B E KENAI PEN. 98 3 21 14 5 25.01 61 30.36N 150 40.81W 58.6 1.4 0.22 2.30 3.78 117 15 12 46 B E COOK INLET. 98 3 21 14 27 53.24 59 39.57N 152 29.69W 72.4 3.4 0.24 0.91 2.86 64 23 15 41 B E COOK INLET. 98 3 21 20 58 26.21 60 37.45N 151 38.23W 66.9 0.9 0.09 16.18 14.65 274 9 7 45 D E KENAI PEN. 98 3 21 20 58 46.74 63 16.29N 151 7.27W 0.0 1.3 0.30 2.51 4.35 169 14 5 33 B E CENTRAL AK. 98 3 21 20 59 57.67 64 36.57N 147 0.15W 0.0 1.3 0.19 0.87 99.00 114 9 4 22 D E CENTRAL AK. 98 3 21 23 40 8.16 61 27.75N 152 1.34W 9.6 1.6 0.19 1.67 0.89 91 15 13 10 A E COOK INLET. 98 3 22 0 6 12.40 61 22.29N 150 28.96W 24.9 1.9 0.22 2.69 5.38 92 12 6 45 C E COOK INLET. 98 3 22 2 1 26.44 59 1.69N 152 53.88W 65.7 2.8 0.16 2.27 5.16 96 12 8 44 C E COOK INLET. 98 3 22 4 11 1.63 61 29.44N 147 12.45W 27.8 1.1 0.12 3.05 13.81 51 11 6 39 D E PR WILLIAM SOUND. 98 3 22 6 46 50.74 61 29.11N 146 39.28W 19.8 1.8 0.10 2.68 10.30 66 13 3 39 D E PR WILLIAM SOUND. 98 3 22 7 50 22.08 62 50.18N 149 23.05W 68.7 1.8 0.13 3.88 3.83 76 14 4 20 B E CENTRAL AK. 98 3 22 8 5 31.31 61 24.95N 151 57.00W 9.2 1.8 0.24 4.57 0.91 88 14 4 12 B E COOK INLET. 98 3 22 9 8 52.11 62 39.12N 147 41.36W 40.1 1.8 0.15 3.25 4.45 73 14 3 50 B E CENTRAL AK. 98 3 22 11 58 37.02 60 51.81N 148 7.91W 17.8 1.2 0.23 3.08 2.02 71 12 4 11 B E KENAI PEN. 98 3 22 12 52 38.15 63 4.42N 151 7.32W 131.8 2.5 0.17 4.96 4.63 72 11 3 54 B E CENTRAL AK. 98 3 22 14 15 56.82 62 32.92N 148 20.68W 37.0 2.1 0.09 1.16 7.49 93 10 5 77 C E CENTRAL AK. 98 3 22 18 9 1.61 62 53.08N 149 29.51W 73.9 2.3 0.20 3.69 5.26 62 15 4 13 C E CENTRAL AK. 98 3 22 20 57 20.71 60 8.47N 148 36.25W 16.7 1.1 0.09 5.28 12.62 132 13 4 43 D E KENAI PEN. 98 3 22 21 3 27.62 60 4.18N 149 14.15W 15.6 2.0 0.31 3.42 2.26 130 15 6 12 B E KENAI PEN. 98 3 22 23 44 58.87 61 48.59N 149 52.39W 47.0 1.3 0.28 5.23 15.63 98 10 4 18 D E COOK INLET.