Issued: May 4, 1999 Prepared by: Lalitha Rao No. 17- 99 The following is a list of significant earthquakes during the time period April 26 - May 2, 1999 April 27 at 00:39 UTC (Apr.26, 04:39 pm ADT), ML 4.3, 54 N 39', 159 W 52', depth = 5 km (3 mi): A light earthquake was located south of Alaska about 54 mi ( 87 km) SSE of Sand Point 92 mi (148 km) SSW of Perryville 102 mi (164 km) ESE of King Cove 108 mi (173 km) SSE of Nelson Lagoon 120 mi (193 km) ESE of Cold Bay April 28 at 16:23 UTC (08:23 am ADT), mb 4.4, 52 N 7', 177 W 7', depth fixed at 33 km (21 mi): A light earthquake was located by NEIC in the Andreanof Islands region of Alaska about 25 mi ( 41 km) NW of Adak 124 mi (200 km) W of Atka 172 mi (276 km) ENE of Amchitka 218 mi (351 km) W of Amukta Pass 296 mi (477 km) E of Buldir Is April 28 at 22:10 UTC (02:10 pm ADT), ML 4.2, 53 N 36', 163 W 38', depth = 18 km (11 mi): A light earthquake was located in the Unimak Island region of Alaska about 87 mi (141 km) S of False Pass 95 mi (153 km) ESE of Akutan 115 mi (184 km) SSW of King Cove 116 mi (187 km) SSW of Cold Bay 120 mi (194 km) E of Dutch Harbor April 30 at 16:35 UTC (08:35 am ADT), ML 4.1, 53 N 46', 164 W 1', depth = 8 km (5 mi): A light earthquake, felt strongly in False Pass, was located in the Unimak Island region of Alaska about 76 mi (122 km) ESE of Akutan 79 mi (128 km) SSW of False Pass 103 mi (166 km) E of Dutch Harbor 103 mi (166 km) E of Unalaska 112 mi (180 km) SSW of Cold Bay _______________________________________________________________________________________________________________________________________________________ DATE TIME LATITUDE LONGITUDE DEPTH PREF. RMS SEH SEZ GAP PHASES MIN Q T REGION, OTHER MAGNITUDES, FELT REPORTS AND COMMENTS YEAR MO DY HR MN SEC DEG MIN DEG MIN KM MAG SEC. KM KM DEG P S DIS _______________________________________________________________________________________________________________________________________________________ 1999 4 26 0 30 13.96 55 48.63N 159 24.93W 107.3 3.5 0.20 4.38 5.72 177 15 12 86 C E ALASKA PEN. 1999 4 26 8 7 24.29 54 6.45N 164 9.39W 9.6 2.6 0.25 2.86 3.07 209 14 9 49 B E UNIMAK IS. 1999 4 26 10 48 13.02 61 26.83N 146 41.82W 19.4 0.9 0.21 1.60 4.20 120 13 6 40 B E PR WILLIAM SOUND. 1999 4 26 11 30 57.02 62 9.03N 148 40.60W 36.8 1.2 0.28 2.16 3.73 103 13 8 42 B E CENTRAL AK. 1999 4 26 12 5 50.23 60 40.02N 151 36.92W 70.9 3.2 0.22 1.23 2.22 60 17 10 22 A E KENAI PEN. 1999 4 26 13 46 11.94 57 39.19N 155 31.66W 7.8 2.1 0.20 7.27 8.07 209 11 5 45 C E ALASKA PEN. 1999 4 26 14 8 10.52 53 34.97N 165 47.54W 99.8 3.4 0.36 10.02 4.86 251 15 8 55 D E FOX ISLS. 1999 4 26 15 2 8.21 60 50.35N 152 6.83W 91.3 2.1 0.31 2.83 5.36 84 19 12 42 C E COOK INLET. 1999 4 26 15 54 45.46 61 45.26N 149 9.43W 15.6 1.9 0.48 0.71 0.81 85 15 9 12 A E COOK INLET. 1999 4 26 18 7 24.28 60 54.78N 147 18.74W 28.3 1.6 0.27 0.92 1.11 57 14 8 12 A E PR WILLIAM SOUND. 1999 4 26 19 3 30.65 60 38.09N 151 6.92W 14.5 1.9 0.17 2.84 2.34 74 15 9 14 B E KENAI PEN. 1999 4 26 19 56 44.84 54 47.66N 161 47.93W 9.7 2.2 0.23 2.13 3.16 185 15 12 35 B E ALASKA PEN. 1999 4 26 19 56 45.50 54 49.87N 161 49.93W 11.5 2.2 0.16 1.48 1.85 203 13 9 31 A E ALASKA PEN. 1999 4 26 20 6 28.15 60 29.29N 144 44.19W 0.7 1.9 0.45 2.98 4.02 101 15 7 12 B E CAPE YAKATAGA. 1999 4 26 20 6 59.89 63 17.59N 151 13.79W 5.8 1.2 0.57 5.00 4.22 186 12 5 33 C E CENTRAL AK. 1999 4 27 0 39 9.34 54 38.86N 159 51.72W 5.0 4.3 0.31 4.17 2.33 220 18 6 41 B E SOUTH OF AK. 1999 4 27 2 15 14.67 63 22.12N 150 10.59W 11.6 2.1 0.15 1.95 3.13 117 8 6 11 B CENTRAL AK. 1999 4 27 2 58 58.56 62 21.86N 148 27.82W 40.5 1.1 0.22 7.28 12.97 221 8 6 62 D E CENTRAL AK. 1999 4 27 4 40 53.40 61 21.72N 146 59.79W 15.2 1.2 0.21 2.13 11.07 94 10 8 40 D E PR WILLIAM SOUND. 1999 4 27 5 35 11.98 64 54.28N 148 59.37W 13.8 1.7 0.22 2.14 2.14 145 11 5 36 A E CENTRAL AK. 1999 4 27 9 26 3.79 61 51.25N 147 23.96W 36.0 1.7 0.33 1.30 1.84 67 15 11 4 A E PR WILLIAM SOUND. 1999 4 27 11 10 47.05 58 22.77N 153 7.68W 56.6 3.0 0.24 3.50 7.37 204 14 11 50 C E KODIAK IS REG. 1999 4 27 15 54 50.73 60 5.66N 151 49.38W 56.9 1.6 0.15 23.42 33.36 297 7 6 63 D E KENAI PEN. 1999 4 27 18 45 6.71 63 15.73N 151 3.45W 6.4 2.8 0.30 1.51 1.46 166 15 10 33 A E CENTRAL AK. 1999 4 27 18 46 9.58 61 0.03N 150 13.54W 15.1 2.1 0.39 3.94 9.76 72 16 5 62 C E COOK INLET. 1999 4 27 23 50 43.64 57 43.36N 155 29.79W 114.1 3.5 0.28 29.00 48.42 332 13 7 252 D E ALASKA PEN. 1999 4 28 5 24 21.37 60 4.01N 152 14.40W 74.6 1.4 0.27 1.38 3.47 78 15 13 40 B E COOK INLET. 1999 4 28 5 38 7.20 61 32.83N 146 30.79W 34.0 1.5 0.37 0.88 2.13 69 17 11 32 A E PR WILLIAM SOUND. 1999 4 28 6 4 7.04 54 7.75N 162 50.49W 22.2 2.7 0.29 4.43 10.54 228 15 9 82 D E ALASKA PEN. 1999 4 28 6 5 48.25 60 41.08N 151 43.41W 75.5 2.0 0.24 2.05 3.86 65 17 12 27 B E KENAI PEN. 1999 4 28 6 43 40.43 54 8.62N 162 49.99W 20.0 2.8 0.18 2.36 5.46 259 14 13 81 C E ALASKA PEN. 1999 4 28 7 34 28.54 61 9.91N 152 17.91W 130.1 2.0 0.17 2.57 5.06 54 18 8 67 C E COOK INLET. 1999 4 28 8 19 25.50 60 52.53N 151 43.77W 95.0 2.0 0.17 4.97 4.85 99 17 14 31 B E KENAI PEN. 1999 4 28 13 44 40.80 60 1.02N 151 48.09W 60.1 1.9 0.27 2.27 3.81 65 17 13 29 B E KENAI PEN. 1999 4 28 13 53 41.89 62 59.15N 150 55.30W 117.1 2.7 0.22 2.21 3.28 89 17 9 61 B E CENTRAL AK. 1999 4 28 15 13 9.80 61 33.68N 146 31.05W 34.4 1.6 0.29 1.76 3.79 108 14 8 33 B E PR WILLIAM SOUND. 1999 4 28 15 14 4.48 63 30.31N 150 59.66W 1.3 0.9 0.22 3.15 7.71 201 9 4 6 C E CENTRAL AK. 1999 4 28 15 49 41.62 60 9.54N 152 28.78W 93.2 1.8 0.16 2.66 2.72 127 14 12 28 B E COOK INLET. 1999 4 28 16 11 5.76 60 46.92N 146 50.26W 19.9 1.4 0.26 1.23 1.11 73 15 11 14 A E PR WILLIAM SOUND. 1999 4 28 16 23 17.65 52 6.54N 177 6.72W 33.0N 4.4mb R ANDREANOF ISLS. 1999 4 28 16 47 6.17 61 22.55N 146 36.99W 18.3 1.7 0.41 1.34 3.14 54 15 10 31 B E PR WILLIAM SOUND. 1999 4 28 18 46 54.03 60 2.05N 153 7.28W 119.6 1.9 0.34 4.43 5.01 66 14 6 4 C E COOK INLET. 1999 4 28 18 54 34.23 62 41.93N 150 55.45W 89.1 2.3 0.25 2.79 3.56 83 16 9 47 B E CENTRAL AK. 1999 4 28 20 36 10.50 60 37.81N 150 25.64W 47.0 1.3 0.24 3.64 7.94 106 13 10 46 C E KENAI PEN. 1999 4 28 22 10 7.68 53 35.80N 163 37.96W 18.4 4.2 0.10 16.93 39.89 261 18 2 116 D E UNIMAK IS. 1999 4 29 1 27 23.86 62 22.45N 148 13.22W 12.5 1.8 0.22 1.19 5.47 45 17 9 63 C E CENTRAL AK. 1999 4 29 2 35 26.78 63 29.31N 150 1.81W 124.1 2.4 0.26 2.41 4.33 69 17 8 13 B E CENTRAL AK. 1999 4 29 3 44 7.60 59 8.01N 152 35.42W 70.9 2.2 0.23 2.29 3.97 109 15 13 53 B E COOK INLET. 1999 4 29 4 41 6.08 60 19.47N 141 33.02W 0.0 2.9 0.44 0.91 1.60 103 14 10 38 A E YAKUTAT BAY. 1999 4 29 5 6 11.08 63 25.96N 151 16.96W 13.6 2.6 0.35 2.38 2.16 109 18 8 22 A E CENTRAL AK. _______________________________________________________________________________________________________________________________________________________ DATE TIME LATITUDE LONGITUDE DEPTH PREF. RMS SEH SEZ GAP PHASES MIN Q T REGION, OTHER MAGNITUDES, FELT REPORTS AND COMMENTS YEAR MO DY HR MN SEC DEG MIN DEG MIN KM MAG SEC. KM KM DEG P S DIS _______________________________________________________________________________________________________________________________________________________ 1999 4 29 5 22 57.81 62 47.22N 148 48.43W 60.7 2.0 0.16 1.08 3.52 67 16 11 47 B E CENTRAL AK. 1999 4 29 7 38 12.57 61 49.45N 148 31.74W 12.0 1.4 0.35 1.13 1.00 76 15 9 10 A E PR WILLIAM SOUND. 1999 4 29 8 25 55.14 60 17.72N 151 42.03W 73.7 2.1 0.25 1.22 4.38 85 19 14 36 B E KENAI PEN. 1999 4 29 11 31 45.32 61 33.92N 146 36.51W 6.0 1.0 0.18 1.30 1.78 72 15 7 38 A E PR WILLIAM SOUND. 1999 4 29 12 22 39.35 53 37.31N 165 24.71W 53.5 2.9 0.41 5.24 8.29 218 18 9 58 C E FOX ISLS. 1999 4 29 12 55 2.44 60 43.72N 146 27.16W 22.8 1.9 0.19 0.77 1.30 70 16 10 8 A E PR WILLIAM SOUND. 1999 4 29 19 4 34.34 58 5.82N 143 9.86W 10.0G 3.4 0.17 5.09 20.55 221 17 4 216 D E GULF OF ALASKA. 1999 4 29 19 10 24.08 61 0.11N 147 6.91W 15.6 0.6 0.26 0.97 1.59 118 11 6 14 A E PR WILLIAM SOUND. 1999 4 29 20 36 9.37 61 32.72N 146 29.25W 30.3 1.9 0.29 0.87 3.03 40 19 15 31 B E PR WILLIAM SOUND. 1999 4 29 23 32 55.62 59 52.07N 152 38.24W 82.4 1.9 0.28 2.10 3.31 59 18 12 26 B E COOK INLET. 1999 4 29 23 42 51.35 62 36.29N 149 0.35W 58.4 2.7 0.20 1.06 3.66 67 16 13 53 B E CENTRAL AK. 1999 4 29 23 47 39.00 59 46.67N 152 56.99W 104.9 3.7 0.23 1.12 2.33 70 20 16 21 A E COOK INLET. 1999 4 30 5 36 35.28 61 32.43N 152 15.64W 134.3 2.7 0.11 5.27 7.51 111 17 9 105 C E COOK INLET. 1999 4 30 6 54 14.84 60 39.94N 148 52.27W 24.1 1.3 0.18 0.95 1.80 96 14 10 33 A E KENAI PEN. 1999 4 30 9 53 21.86 60 20.49N 150 20.80W 10.6 1.7 0.15 1.73 5.08 103 17 11 57 C E KENAI PEN. 1999 4 30 12 34 53.19 61 29.47N 149 40.35W 37.2 2.0 0.26 1.41 2.31 51 17 9 21 A E COOK INLET. 1999 4 30 12 35 22.42 64 29.70N 147 34.16W 10.9 0.4 0.19 3.50 8.59 186 5 4 20 C E CENTRAL AK. 1999 4 30 12 43 6.62 61 1.55N 147 4.06W 15.1 0.8 0.31 0.84 1.81 54 14 9 16 A E PR WILLIAM SOUND. 1999 4 30 13 20 19.49 62 7.91N 147 26.30W 40.5 1.6 0.37 1.53 2.90 46 16 11 34 B E CENTRAL AK. 1999 4 30 13 53 35.72 58 43.97N 152 53.17W 59.4 3.0 0.17 1.46 2.85 89 15 15 32 B E KODIAK IS REG. 1999 4 30 16 35 34.49 53 45.75N 164 1.06W 7.6 4.1 0.18 3.97 9.90 226 18 4 87 C E UNIMAK IS. 1999 4 30 16 44 15.62 53 48.37N 164 2.50W 26.0 3.3 0.26 2.90 46.48 224 17 10 82 D E UNIMAK IS. 1999 4 30 16 56 55.33 61 16.21N 151 56.23W 99.9 2.8 0.29 2.53 4.36 52 17 8 70 B E COOK INLET. 1999 4 30 18 47 20.15 62 29.22N 150 46.74W 81.3 2.2 0.33 1.74 3.15 74 18 11 28 B E CENTRAL AK. 1999 4 30 20 16 31.76 63 23.76N 151 26.84W 9.1 3.3 0.28 3.89 2.78 81 19 5 102 B E CENTRAL AK. 1999 4 30 20 33 28.73 61 0.88N 147 22.19W 4.6 0.7 0.29 2.20 2.01 117 8 5 21 A E PR WILLIAM SOUND. 1999 4 30 21 34 22.49 63 30.34N 150 54.63W 77.8 2.6 0.42 6.98 9.19 198 16 5 87 C E CENTRAL AK. 1999 4 30 22 5 30.10 61 48.39N 150 54.62W 56.9 1.8 0.33 3.44 4.17 78 17 7 57 B E COOK INLET. 1999 4 30 23 32 21.96 53 48.37N 167 8.67W 97.7 3.1 0.21 19.93 3.59 312 14 14 13 D E FOX ISLS. 1999 4 30 23 53 40.56 61 52.93N 150 57.85W 75.7 1.9 0.25 3.38 4.47 82 17 13 63 B E COOK INLET. 1999 5 1 1 21 31.62 61 32.46N 141 12.03W 0.0 3.7 0.79 2.29 2.31 163 16 12 65 A E CAPE YAKATAGA. 1999 5 1 2 1 7.28 61 35.21N 146 33.36W 14.4 2.0 0.46 1.05 5.12 46 19 10 35 C E PR WILLIAM SOUND. 1999 5 1 2 3 52.35 61 33.88N 146 35.12W 14.3 1.6 0.24 2.75 4.20 40 19 8 36 B E PR WILLIAM SOUND. 1999 5 1 2 4 58.15 59 31.37N 152 22.77W 73.0 1.8 0.22 2.25 2.76 164 12 9 50 B E COOK INLET. 1999 5 1 3 25 23.10 61 4.80N 151 20.74W 73.2 3.0 0.24 2.41 4.19 52 18 11 38 B E COOK INLET. 1999 5 1 6 4 5.32 60 45.22N 151 40.86W 71.2 3.3 0.21 1.22 2.27 65 19 12 24 A E KENAI PEN. 1999 5 1 7 24 18.34 61 24.90N 146 44.78W 21.7 0.8 0.21 1.81 3.30 112 10 6 39 B E PR WILLIAM SOUND. 1999 5 1 10 2 35.03 61 57.66N 150 52.46W 64.0 1.9 0.26 4.84 5.24 78 18 8 59 C E COOK INLET. 1999 5 1 10 37 17.17 60 56.85N 147 1.26W 25.0 1.0 0.11 1.01 1.91 100 9 6 9 A E PR WILLIAM SOUND. 1999 5 1 11 18 43.76 62 5.05N 151 47.11W 87.9 2.3 0.35 4.32 7.50 56 20 11 86 C E CENTRAL AK. 1999 5 1 13 21 38.61 61 18.78N 146 48.76W 27.4 0.9 0.20 2.73 6.54 76 9 6 31 C E PR WILLIAM SOUND. 1999 5 1 13 27 51.73 61 12.94N 150 36.27W 42.7 2.6 0.14 1.39 2.19 74 15 9 24 A E COOK INLET. 1999 5 1 13 42 39.97 58 42.83N 154 2.63W 94.6 2.5 0.21 2.74 2.70 95 19 14 22 B E ALASKA PEN. 1999 5 1 13 49 37.39 58 15.77N 154 54.31W 98.7 3.5 0.24 3.42 3.03 129 14 12 15 B E ALASKA PEN. 1999 5 1 14 52 29.44 59 53.98N 152 48.40W 100.9 2.2 0.24 2.34 3.18 92 16 12 16 B E COOK INLET. 1999 5 1 15 49 47.75 64 40.43N 149 31.75W 21.9 2.3 0.24 2.19 1.36 85 15 7 24 A E CENTRAL AK. 1999 5 1 16 58 17.19 61 60.00N 149 23.13W 47.5 1.7 0.30 2.89 4.58 101 16 9 35 B E CENTRAL AK. 1999 5 1 18 27 36.23 60 47.03N 150 21.59W 3.1 2.1 0.60 2.37 3.12 74 17 5 44 B E KENAI PEN. 1999 5 1 18 45 0.11 62 17.35N 153 22.12W 3.2 3.1 0.26 3.71 6.91 75 17 10 153 C E CENTRAL AK. 1999 5 1 19 5 34.50 61 20.01N 147 35.14W 31.0 1.2 0.13 1.03 2.30 64 15 8 19 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 YEAR MO DY HR MN SEC DEG MIN DEG MIN KM MAG SEC. KM KM DEG P S DIS _______________________________________________________________________________________________________________________________________________________ 1999 5 1 19 11 16.59 61 0.05N 147 1.24W 17.7 0.5 0.22 1.60 2.24 68 11 5 14 A E PR WILLIAM SOUND. 1999 5 1 21 4 18.88 63 49.24N 148 32.04W 96.0 2.6 0.20 2.33 6.10 59 15 8 49 C E CENTRAL AK. 1999 5 1 23 46 28.92 62 6.52N 147 58.64W 28.4 1.8 0.21 1.21 4.74 52 19 11 38 B E CENTRAL AK.