ssued: February 22, 1999 Prepared by: Nan Macgregor-Scott No. 08 - 99 The following is a list of significant earthquakes during the time period February 15 - 21, 1999 February 15 at 13:33 UTC (04:33 am AST), mb 4.1, 52 N 15Õ, 169 W 15Õ, depth fixed at 33 km (21 mi): A light earthquake was located by NEIC in the Fox Islands region of Alaska about 51 mi ( 81 km) SSW of Nikolski 117 mi (188 km) E of Amukta Pass 160 mi (257 km) SW of Unalaska 161 mi (259 km) SW of Dutch Harbor 195 mi (314 km) SW of Akutan February 16 at 21:02 UTC (12:02 pm AST), ML 4.1, 58 N 31Õ, 142 W 45Õ, depth = 10 km (6 mi): A light earthquake was located beneath the Gulf of Alaska about 107 mi (172 km) SSW of Icy Bay 108 mi (174 km) S of Cape Yakataga 130 mi (208 km) WSW of Yakutat 143 mi (231 km) ESE of Middleton Island 176 mi (284 km) SE of Cordova February 17 at 00:30 UTC (03:30 pm AST), ML 3.5, 55 N 6Õ, 159 W 27Õ, depth = 7 km (5 mi): A minor earthquake was located in the Alaska Peninsula region of Alaska about 44 mi ( 71 km) ESE of Sand Point 57 mi ( 91 km) SSW of Perryville 92 mi (147 km) SSW of Chignik 93 mi (149 km) SE of Nelson Lagoon 94 mi (151 km) SSW of Chignik Lagoon February 17 at 04:29 UTC (07:29 pm AST), ML 3.6, 53 N 29Õ, 163 W 41Õ, depth = 0 km (0 mi): A minor earthquake was located in the Unimak Island region of Alaska about 96 mi (154 km) S of False Pass 97 mi (156 km) ESE of Akutan 120 mi (193 km) ESE of Dutch Harbor 121 mi (194 km) ESE of Unalaska 123 mi (197 km) SSW of King Cove February 17 at 18:32 UTC (09:32 am AST), ML 3.6, 53 N 28Õ, 163 W 39Õ, depth = 0 km (0 mi): A minor earthquake was located in the Unimak Island region of Alaska about 97 mi (156 km) S of False Pass 99 mi (159 km) ESE of Akutan 122 mi (196 km) ESE of Dutch Harbor 122 mi (196 km) ESE of Unalaska 123 mi (199 km) SSW of King Cove February 18 at 09:22 UTC (12:22 am AST), ML 3.9, 63 N 34Õ, 150 W 31Õ, depth = 17 km (11 mi): A minor earthquake was located in the central region of Alaska about 14 mi ( 22 km) ENE of Kantishna 15 mi ( 24 km) NW of Eielson Visitor Ctr. 50 mi ( 81 km) W of Denali Park entrance 50 mi ( 81 km) WNW of Cantwell 52 mi ( 84 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 _____________________________________________________________________________________________________________________________________________________ 99 2 15 13 33 19.63 52 14.64N 169 15.12W 33.0N 4.1mb R FOX ISLS. 99 2 15 23 30 16.19 54 16.67N 163 17.98W 58.8 3.0 0.10 19.42 15.99 241 17 4 50 D E UNIMAK IS. 99 2 16 2 2 41.70 60 18.03N 151 0.24W 58.4 1.4 0.11 2.50 10.59 117 11 8 33 D E KENAI PEN. 99 2 16 2 29 52.32 60 34.71N 151 4.28W 70.7 1.5 0.14 3.98 8.60 144 10 6 89 C E KENAI PEN. 99 2 16 3 3 23.70 60 22.80N 153 31.06W 164.9 3.0 0.24 2.80 3.84 124 15 10 38 B E COOK INLET. 99 2 16 3 9 20.28 59 58.24N 152 48.63W 95.7 2.2 0.22 1.64 1.63 52 16 12 13 A E COOK INLET. 99 2 16 6 12 33.92 62 51.63N 148 19.67W 64.8 2.0 0.18 2.67 4.62 90 16 14 54 B E CENTRAL AK. 99 2 16 9 14 3.13 61 43.78N 149 27.71W 32.2 1.2 0.23 1.06 2.54 109 10 3 23 B E COOK INLET. 99 2 16 10 38 39.84 61 16.69N 147 58.55W 38.4 1.7 0.28 0.96 1.99 65 17 10 15 A E PR WILLIAM SOUND. 99 2 16 11 14 16.97 60 22.58N 151 21.38W 60.9 1.5 0.13 3.91 6.70 80 13 10 37 C E KENAI PEN. 99 2 16 11 49 13.58 60 6.04N 153 2.75W 133.2 2.9 0.23 3.67 1.72 92 18 7 5 B E COOK INLET. 99 2 16 12 1 53.91 60 51.88N 150 52.09W 11.6 2.8 0.23 1.32 1.55 64 21 13 24 A E KENAI PEN. 99 2 16 12 53 46.89 61 3.22N 145 29.20W 17.0 1.6 0.23 0.85 1.42 62 12 6 18 A E PR WILLIAM SOUND. 99 2 16 21 2 28.32 58 30.57N 142 44.62W 10.0G 4.1 0.24 7.21 14.62 225 18 7 176 D E GULF OF ALASKA. 99 2 17 0 30 22.96 55 6.49N 159 26.90W 7.3 3.5 0.27 10.96 6.03 229 17 12 46 D E ALASKA PEN. 99 2 17 2 11 48.56 62 4.97N 150 56.09W 70.0 3.3 0.19 1.59 3.24 80 21 4 50 B E CENTRAL AK. 99 2 17 4 29 13.47 53 28.85N 163 40.74W 0.0 3.6 0.16 22.71 24.16 232 16 6 125 D E UNIMAK IS. 99 2 17 4 31 45.70 59 59.33N 153 4.67W 2.5 0.4 0.02 2.02 2.28 185 5 6 2 A a COOK INLET. 99 2 17 4 45 41.79 61 6.47N 148 52.51W 37.0 0.8 0.06 4.06 14.38 92 8 4 40 D E PR WILLIAM SOUND. 99 2 17 7 58 27.60 65 25.02N 144 23.43W 13.5 2.6 0.22 6.82 4.30 179 15 5 53 C E N CENTRAL AK. 99 2 17 10 49 24.90 55 20.21N 159 53.09W 64.1 2.8 0.11 12.49 10.65 172 15 4 39 D E ALASKA PEN. 99 2 17 18 32 20.14 53 27.53N 163 39.14W 0.0 3.6 0.17 22.32 26.96 233 16 4 128 D E UNIMAK IS. 99 2 17 22 50 7.25 63 10.82N 150 41.89W 134.2 3.1 0.27 5.86 5.24 156 16 7 37 C E CENTRAL AK. 99 2 17 23 56 44.95 64 44.50N 147 25.25W 13.7 1.7 0.13 1.86 3.45 103 12 4 21 B E CENTRAL AK. 99 2 18 1 21 46.94 61 36.75N 147 51.93W 22.8 1.2 0.25 0.94 2.00 87 14 11 33 A E PR WILLIAM SOUND. 99 2 18 1 55 40.64 63 17.11N 149 17.66W 98.1 1.9 0.19 2.47 5.10 84 16 8 26 C E CENTRAL AK. 99 2 18 2 1 49.55 61 38.86N 146 27.01W 37.4 1.1 0.19 2.66 5.56 81 12 5 33 C E PR WILLIAM SOUND. 99 2 18 3 35 56.58 55 1.94N 161 43.22W 102.6 3.1 0.28 1.97 1.55 160 17 15 16 A E ALASKA PEN. 99 2 18 7 26 31.91 61 25.17N 146 50.84W 13.4 2.0 0.21 0.75 1.53 62 17 10 42 A E PR WILLIAM SOUND. 99 2 18 9 13 6.56 61 10.77N 151 56.67W 20.9 2.0 0.13 2.50 1.60 64 19 11 62 A E COOK INLET. 99 2 18 9 22 1.14 63 33.59N 150 31.35W 17.4 3.9 0.47 0.92 0.97 98 19 10 17 A E CENTRAL AK. 99 2 18 14 1 11.52 60 41.24N 151 2.78W 10.9 2.0 0.19 1.42 1.33 89 15 12 12 A E KENAI PEN. 99 2 18 14 4 50.26 60 46.84N 147 22.48W 2.8 1.4 0.42 1.10 1.99 123 14 8 43 A E PR WILLIAM SOUND. 99 2 18 16 24 20.13 59 48.77N 153 18.03W 116.2 2.3 0.26 2.57 2.74 107 18 17 18 B E COOK INLET. 99 2 18 19 52 11.31 59 30.34N 153 11.16W 97.9 2.9 0.23 1.85 3.14 124 19 13 17 B E COOK INLET. 99 2 18 23 30 40.27 59 17.11N 152 19.13W 63.8 2.6 0.30 0.94 3.10 117 20 13 57 B E COOK INLET. 99 2 19 2 23 9.25 60 3.81N 153 31.07W 143.7 2.2 0.25 4.97 8.29 90 13 3 25 C E COOK INLET. 99 2 19 2 24 13.63 62 10.24N 147 49.56W 46.1 2.3 0.14 3.05 9.22 53 12 6 46 C E CENTRAL AK. 99 2 19 4 27 32.59 61 41.33N 149 51.28W 38.5 2.1 0.15 2.85 3.23 62 22 5 4 B E COOK INLET. 99 2 19 6 23 20.17 63 4.03N 150 59.36W 134.5 2.4 0.24 2.42 5.32 77 10 4 55 C E CENTRAL AK. 99 2 19 7 0 50.90 61 25.52N 150 3.40W 48.0 1.4 0.18 5.51 6.79 63 14 5 27 C E COOK INLET. 99 2 19 10 3 12.52 63 3.21N 150 30.02W 95.1 1.9 0.16 8.70 10.45 83 10 4 46 D E CENTRAL AK. 99 2 19 12 5 27.26 59 54.19N 153 8.51W 120.9 1.9 0.13 8.87 10.31 64 12 4 7 D E COOK INLET. 99 2 19 17 41 25.06 61 3.06N 147 31.42W 8.9 1.0 0.16 3.38 3.86 97 9 5 20 B E PR WILLIAM SOUND. 99 2 19 17 42 0.70 61 3.41N 147 30.33W 9.7 0.6 0.19 4.27 4.26 71 10 6 20 B E PR WILLIAM SOUND. 99 2 19 19 0 45.39 61 14.49N 150 56.08W 61.2 2.3 0.17 4.54 11.74 74 15 3 58 D E COOK INLET. 99 2 19 20 1 26.68 60 10.53N 152 11.23W 79.1 1.5 0.08 7.61 13.95 89 11 4 42 D E COOK INLET. 99 2 19 20 37 55.85 59 25.32N 153 7.51W 102.1 1.2 0.46 11.79 11.43 126 11 3 18 D E COOK INLET. 99 2 20 7 18 11.34 61 17.76N 145 42.02W 23.5 1.1 0.15 1.71 2.86 70 13 5 25 B E PR WILLIAM SOUND. 99 2 20 9 24 15.37 61 25.44N 146 50.94W 13.0 1.6 0.26 1.15 1.80 76 15 9 43 A 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 _____________________________________________________________________________________________________________________________________________________ 99 2 20 16 6 43.46 61 20.88N 147 11.52W 14.0 2.3 0.44 0.87 1.91 42 16 9 36 A E PR WILLIAM SOUND. 99 2 21 3 33 22.64 60 18.06N 140 53.16W 2.0 3.0 0.44 1.18 2.02 137 14 5 29 A E YAKUTAT BAY. 99 2 21 8 41 32.17 60 54.63N 149 52.75W 42.2 1.6 0.16 4.68 10.30 74 15 6 33 D E KENAI PEN. 99 2 21 11 59 21.36 61 37.91N 149 38.42W 30.9 1.2 0.19 4.22 4.22 88 12 6 13 B E COOK INLET. 99 2 21 13 36 30.42 60 13.80N 152 54.00W 106.1 2.1 0.15 8.50 11.12 74 12 3 17 D E COOK INLET. 99 2 21 15 43 12.09 60 26.30N 150 48.10W 31.3 2.0 0.07 3.09 5.91 98 15 5 42 C E KENAI PEN. 99 2 21 23 39 11.45 60 41.95N 153 25.75W 14.1 1.9 0.17 3.70 1.87 83 17 6 31 B E COOK INLET.