ssued: July 27, 1998 Prepared by: Nan Macgregor-Scott No. 28 - 98 The following is a list of significant earthquakes during the time period July 20 - 26, 1998 July 20 at 21:12 UTC (01:12 pm ADT), mb 4.9, 59 N 35Õ, 153 W 20Õ, depth = 109 km (67 mi): A light earthquake was located by NEIC in the Cook Inlet region of Alaska about 31 mi ( 49 km) ESE of Pedro Bay 52 mi ( 84 km) WNW of English Bay 54 mi ( 88 km) WSW of Anchor Point 55 mi ( 88 km) SE of Port Alsworth 55 mi ( 89 km) WNW of Port Graham July 21 at 08:03 UTC (12:03 am ADT), ML 4.3, 59 N 53Õ, 153 W 8Õ, depth = 123 km (76 mi): A light earthquake was located in the Cook Inlet region of Alaska about 35 mi ( 56 km) ENE of Pedro Bay 46 mi ( 74 km) W of Anchor Point 47 mi ( 75 km) ESE of Port Alsworth 52 mi ( 84 km) WSW of Ninilchik 56 mi ( 90 km) NW of English Bay July 26 at 04:15 UTC (08:15 pm ADT), ML 3.6, 53 N 8Õ, 164 W 24Õ, depth = 28 km (17 mi): A minor earthquake was located in the Unimak Island region of Alaska about 90 mi (144 km) SE of Akutan 102 mi (164 km) ESE of Unalaska 102 mi (164 km) ESE of Dutch Harbor 126 mi (203 km) SSW of False Pass 158 mi (254 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 YR MO DY HR MN SEC DEG MIN DEG MIN KM MAG SEC. KM KM DEG P S DIS _____________________________________________________________________________________________________________________________________________________ 98 7 20 0 36 43.39 61 30.28N 150 44.44W 56.0 2.1 0.30 5.09 11.68 71 14 8 49 D E COOK INLET. 98 7 20 2 54 11.35 63 12.79N 150 42.62W 136.8 3.4 0.25 2.48 4.18 72 16 4 34 B E CENTRAL AK. 98 7 20 3 43 49.43 63 32.64N 150 58.89W 9.5 2.4 0.12 3.97 2.33 80 10 3 3 B E CENTRAL AK. 98 7 20 8 31 54.70 63 21.49N 151 17.82W 9.9 2.1 0.22 6.50 4.57 80 12 3 29 C E CENTRAL AK. 98 7 20 9 44 52.51 60 39.01N 147 34.90W 12.4 1.2 0.22 3.79 6.11 78 14 6 37 C E PR WILLIAM SOUND. 98 7 20 12 0 5.86 61 37.66N 149 59.96W 38.3 2.4 0.13 3.06 3.39 104 16 7 7 B E COOK INLET. 98 7 20 21 12 44.89 59 35.31N 153 20.10W 108.6 2.6 0.26 12.22 12.97 88 10 3 24 D E COOK INLET. 98 7 21 2 55 2.80 60 52.15N 151 33.60W 64.7 2.3 0.25 1.67 5.01 77 16 12 22 C E KENAI PEN. 98 7 21 3 57 4.93 64 36.49N 149 18.85W 18.3 2.2 0.34 1.00 0.93 119 13 6 12 A E CENTRAL AK. 98 7 21 6 52 42.03 62 31.11N 150 27.27W 66.1 2.3 0.15 2.77 2.76 186 15 10 16 B E CENTRAL AK. 98 7 21 7 2 32.20 62 48.04N 149 38.85W 76.4 3.2 0.12 1.37 1.94 59 16 12 20 A E CENTRAL AK. 98 7 21 8 3 30.39 59 52.78N 153 7.96W 122.6 4.3 0.26 1.22 2.36 99 30 19 9 A E COOK INLET. 98 7 21 18 45 21.37 65 8.48N 148 34.80W 18.5 2.0 0.22 4.15 3.24 202 6 4 45 B E N CENTRAL AK. 98 7 21 20 11 58.41 62 36.49N 149 10.74W 72.0 2.7 0.28 1.25 2.23 49 18 11 47 A E CENTRAL AK. 98 7 22 0 27 11.09 58 15.53N 155 33.39W 10.0 0.3 0.29 4.41 5.10 149 9 7 8 C a ALASKA PEN. 98 7 22 0 33 4.67 64 53.07N 147 43.41W 15.4 0.5 0.27 10.41 13.76 154 5 2 7 D E CENTRAL AK. 98 7 22 0 34 23.47 59 40.92N 153 34.73W 114.3 2.6 0.09 3.41 7.27 66 26 4 20 C E COOK INLET. 98 7 22 2 26 17.00 60 18.92N 153 18.91W 0.0 2.4 0.14 1.22 3.59 89 27 5 30 B E COOK INLET. 98 7 22 3 38 36.16 61 4.83N 151 33.74W 82.1 3.3 0.22 1.77 4.01 60 18 6 42 B E COOK INLET. 98 7 22 8 37 56.18 54 36.08N 163 30.09W 5.7 1.8 0.13 3.42 5.56 190 14 6 16 C E UNIMAK IS. 98 7 22 10 18 32.33 60 31.92N 149 1.93W 15.9 0.9 0.15 5.87 8.97 85 8 3 19 C E KENAI PEN. 98 7 22 10 19 7.66 60 19.98N 151 28.90W 88.4 1.9 0.12 4.81 8.79 90 10 2 34 C E KENAI PEN. 98 7 22 12 59 2.97 63 16.49N 149 37.25W 93.5 1.6 0.35 7.14 9.37 97 12 4 33 C E CENTRAL AK. 98 7 22 17 14 18.55 62 13.73N 151 4.21W 58.4 2.1 0.32 5.47 14.53 158 11 5 46 D E CENTRAL AK. 98 7 22 21 5 39.99 61 36.25N 146 36.68W 29.6 2.0 0.19 2.48 10.24 57 15 8 39 D E PR WILLIAM SOUND. 98 7 22 22 35 4.36 59 49.13N 151 56.62W 77.7 2.1 0.32 10.54 11.63 81 10 4 25 D E KENAI PEN. 98 7 23 0 34 56.57 62 48.44N 149 37.17W 76.0 2.3 0.16 1.20 2.37 105 17 10 19 A E CENTRAL AK. 98 7 23 5 53 33.07 57 45.28N 142 55.22W 10.0G 3.1 0.30 22.87 40.11 272 15 7 257 D E GULF OF ALASKA. 98 7 23 6 12 57.40 64 1.72N 149 31.71W 144.2 2.5 0.22 1.63 3.83 100 15 8 16 B E CENTRAL AK. 98 7 23 6 14 7.99 59 19.24N 151 38.16W 67.6 2.2 0.28 1.36 2.68 164 22 16 15 B E KENAI PEN. 98 7 23 7 58 28.50 62 2.59N 149 0.10W 38.4 2.0 0.26 1.59 3.35 75 17 12 30 B E CENTRAL AK. 98 7 23 8 44 46.30 61 9.68N 145 50.67W 23.5 2.0 0.33 0.92 1.27 67 15 10 27 A E PR WILLIAM SOUND. 98 7 23 8 45 21.56 58 11.01N 155 17.38W 1.5 0.4 0.11 1.44 2.91 95 6 5 4 B a ALASKA PEN. 98 7 23 8 45 23.14 57 55.66N 156 24.04W 12.0 1.6 0.15 3.62 5.51 317 10 10 48 C a ALASKA PEN. 98 7 23 9 41 47.78 63 16.49N 151 19.03W 4.7 1.7 0.29 3.52 4.06 211 14 4 37 B E CENTRAL AK. 98 7 23 10 30 43.26 63 16.94N 151 20.94W 7.9 2.7 0.26 1.90 1.17 106 16 8 37 A E CENTRAL AK. 98 7 23 11 34 32.96 54 56.18N 161 42.70W 75.9 1.9 0.22 3.15 3.15 170 13 10 26 B E ALASKA PEN. 98 7 23 12 6 25.25 58 4.42N 156 25.43W 2.2 3.0 0.18 1.66 1.00 165 15 12 38 A E ALASKA PEN. 98 7 23 13 33 27.63 63 14.59N 150 25.23W 118.3 2.3 0.16 2.50 4.12 149 15 9 24 B E CENTRAL AK. 98 7 23 15 23 5.87 61 22.73N 146 41.29W 12.6 2.6 0.22 0.89 1.96 58 18 12 33 A E PR WILLIAM SOUND. 98 7 23 15 35 13.16 61 22.64N 147 35.10W 25.3 2.3 0.20 0.75 2.73 54 17 10 24 B E PR WILLIAM SOUND. 98 7 23 16 15 6.12 60 21.49N 153 33.45W 169.1 3.3 0.22 2.32 3.82 98 26 10 41 B E COOK INLET. 98 7 23 19 6 45.24 54 9.44N 166 0.53W 4.2 0.4 0.06 2.05 3.27 139 4 4 2 B a FOX ISLS. 98 7 23 20 4 7.33 61 43.15N 150 47.62W 50.2 0.38 1.18 2.21 78 17 11 29 A E COOK INLET. 98 7 23 21 20 28.33 61 19.81N 150 47.92W 49.6 1.8 0.17 1.79 2.81 75 19 15 15 B E COOK INLET. 98 7 24 2 21 28.31 62 1.17N 149 44.62W 44.5 1.6 0.29 5.19 10.05 94 13 7 42 D E CENTRAL AK. 98 7 24 9 11 8.00 61 32.43N 146 20.56W 31.5 1.0 0.15 4.13 8.28 53 15 4 23 C E PR WILLIAM SOUND. 98 7 24 9 11 24.05 61 33.63N 146 19.90W 31.0 1.5 0.17 3.94 6.13 58 15 8 23 C E PR WILLIAM SOUND. 98 7 24 12 18 24.59 63 14.40N 151 23.74W 4.1 2.4 0.28 5.36 7.69 105 17 6 42 C E CENTRAL AK. 98 7 24 20 36 56.27 61 28.83N 146 27.06W 6.2 1.4 0.20 2.88 4.18 56 14 7 28 B 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 7 24 21 16 26.32 60 33.41N 150 48.85W 18.7 1.4 0.14 2.29 4.88 82 10 4 31 B E KENAI PEN. 98 7 24 21 59 11.37 62 53.71N 150 27.84W 100.5 1.8 0.12 6.90 8.84 95 11 6 43 C E CENTRAL AK. 98 7 25 0 4 37.12 62 2.92N 150 15.41W 44.7 2.0 0.24 3.28 5.89 99 13 6 40 C E CENTRAL AK. 98 7 25 0 50 36.92 60 54.95N 149 15.15W 25.9 2.2 0.22 0.86 5.16 90 17 11 40 C E KENAI PEN. 98 7 25 3 14 25.86 61 54.09N 151 14.43W 75.5 1.6 0.18 5.08 10.98 144 10 4 76 D E COOK INLET. 98 7 25 5 34 35.67 62 11.76N 149 39.89W 40.4 0.34 2.43 5.58 106 14 6 39 C E CENTRAL AK. 98 7 25 9 7 51.41 61 32.93N 149 54.28W 46.3 2.6 0.32 0.86 1.69 57 16 14 11 A E COOK INLET. 98 7 25 10 30 39.99 61 39.62N 146 38.17W 19.7 0.32 1.53 2.79 84 14 7 41 B E PR WILLIAM SOUND. 98 7 25 19 20 33.12 60 52.41N 146 53.95W 22.3 2.6 0.30 0.72 1.03 65 17 11 11 A E PR WILLIAM SOUND. 98 7 25 20 36 11.78 63 14.85N 151 6.89W 3.0 2.5 0.28 2.34 2.78 171 16 13 35 B E CENTRAL AK. 98 7 26 0 8 3.05 59 58.05N 148 28.21W 35.5 1.0 0.31 14.72 64.40 220 4 3 57 D E KENAI PEN. 98 7 26 1 40 10.51 61 3.60N 152 13.96W 121.5 3.1 0.19 4.26 10.26 66 21 3 16 D E COOK INLET. 98 7 26 2 10 18.59 61 41.64N 151 51.13W 100.6 2.8 0.26 5.88 7.16 101 15 4 61 C E COOK INLET. 98 7 26 3 34 25.57 60 29.06N 147 12.24W 13.4 1.4 0.15 2.92 4.41 59 14 5 40 B E PR WILLIAM SOUND. 98 7 26 4 15 8.85 53 7.64N 164 24.08W 27.7 3.6 0.21 17.61 38.80 243 16 5 139 D E UNIMAK IS. 98 7 26 6 14 26.17 61 41.86N 152 6.19W 119.9 2.3 0.12 9.13 11.88 104 15 4 48 D E COOK INLET. 98 7 26 8 21 12.43 61 59.19N 149 28.88W 46.5 1.0 0.14 9.24 13.44 112 10 3 38 D E COOK INLET. 98 7 26 15 51 26.89 63 34.86N 150 45.15W 10.8 2.6 0.20 2.00 1.26 110 16 4 9 A E CENTRAL AK. 98 7 26 22 31 45.95 64 47.12N 147 31.67W 12.4 0.8 0.34 4.08 8.02 74 10 3 19 C E CENTRAL AK.