ssued: July 13, 1998 Prepared by: Nan Macgregor-Scott No. 26 - 98 The following is a list of significant earthquakes during the time period July 6 - 12, 1998 July 8 at 08:18 UTC (12:18 am ADT), ML 4.2, 52 N 56Í, 178 E 46Í, depth = 14 km (9 mi): A light earthquake was located in the Rat Islands region of Alaska about 98 mi (157 km) N of Amchitka 126 mi (203 km) ENE of Buldir Is 195 mi (314 km) E of Shemya Is 207 mi (334 km) WNW of Adak 231 mi (372 km) E of Attu July 9 at 19:39 UTC (11:39 am ADT), ML 6.4, 60 N 23Í, 152 W 49Í, depth = 134 km (83 mi): A strong earthquake, felt throughout southcentral Alaska and the Interior, was located in the Cook Inlet region. This deep event was felt sharply in the Anchorage and Kenai Peninsula areas, with no injuries and only minor damage reported. The epicenter was located about 46 mi ( 74 km) WNW of Ninilchik 51 mi ( 81 km) WNW of Clam Gulch 53 mi ( 85 km) ENE of Port Alsworth 53 mi ( 86 km) W of Kasilof 55 mi ( 88 km) W of Kenai July 9 at 19:50 UTC (11:50 am ADT), ML 3.9, 60 N 23Í, 153 W 3Í, depth = 140 km (87 mi): A minor earthquake was located in the Cook Inlet region of Alaska about 45 mi ( 72 km) ENE of Port Alsworth 53 mi ( 86 km) WNW of Ninilchik 55 mi ( 89 km) NE of Pedro Bay 58 mi ( 94 km) WNW of Clam Gulch 60 mi ( 97 km) NW of Anchor Point July 10 at 09:48 UTC (01:48 am ADT), ML 4.2, 55 N 19Í, 158 W 54Í, depth = 51 km (32 mi): A light earthquake was located in the Alaska Peninsula region of Alaska about 43 mi ( 68 km) SSE of Perryville 63 mi (101 km) E of Sand Point 71 mi (114 km) SSW of Chignik 74 mi (119 km) SSW of Chignik Lagoon 102 mi (164 km) ESE of Nelson Lagoon July 12 at 11:15 UTC (03:15 am ADT), mb 5.1, 52 N 49Í, 174 W 45Í, depth = 185 km (115 mi): A moderate earthquake was located by NEIC in the Andreanof Islands region of Alaska about 50 mi ( 80 km) NNW of Atka 104 mi (167 km) NE of Adak 121 mi (194 km) WNW of Amukta Pass 247 mi (397 km) W of Nikolski 280 mi (451 km) ENE of Amchitka _____________________________________________________________________________________________________________________________________________________ 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 6 2 0 45.67 53 50.98N 166 30.95W 0.0 0.6 0.22 11.52 98.81 213 7 2 12 D a FOX ISLS. 98 7 6 2 54 10.77 60 20.87N 152 12.04W 70.3 2.0 0.29 5.08 8.01 109 15 3 32 C E COOK INLET. 98 7 6 5 18 41.17 65 4.90N 148 37.30W 24.9 1.5 0.22 6.18 99.00 134 6 5 59 D E N CENTRAL AK. 98 7 6 6 27 14.47 56 53.73N 155 1.44W 76.4 2.0 0.44 55.87 90.40 275 10 3 130 D E ALASKA PEN. 98 7 6 6 31 34.22 57 59.21N 156 37.60W 6.4 0.33 12.12 15.73 185 12 4 54 D E ALASKA PEN. 98 7 6 8 15 32.66 63 16.23N 151 5.45W 5.2 1.8 0.19 5.24 8.96 183 10 5 33 C E CENTRAL AK. 98 7 6 8 22 50.17 62 8.59N 153 26.59W 6.2 1.9 0.43 4.01 11.47 94 11 5 112 D E CENTRAL AK. 98 7 6 9 22 19.13 57 48.37N 151 15.53W 0.8 3.1 0.25 15.06 16.79 210 14 6 74 D E KODIAK IS REG. 98 7 6 11 0 17.39 63 25.51N 149 48.94W 108.7 1.9 0.16 9.26 13.57 71 11 3 24 D E CENTRAL AK. 98 7 6 11 56 55.04 60 14.19N 152 42.79W 0.0 1.0 0.15 4.48 5.79 122 7 5 22 C E COOK INLET. 98 7 6 15 5 57.95 60 19.44N 141 4.46W 11.9 1.8 0.14 1.63 6.19 128 14 6 37 C E YAKUTAT BAY. 98 7 6 17 1 25.28 59 26.54N 150 23.26W 27.8 2.1 0.10 6.34 18.47 208 10 4 46 D E KENAI PEN. 98 7 6 17 15 9.01 54 49.12N 161 45.48W 59.3 3.3 0.17 2.32 3.11 201 15 5 36 B E ALASKA PEN. 98 7 6 17 24 23.40 61 26.32N 147 48.23W 35.2 2.1 0.11 1.22 4.37 83 10 6 35 B E PR WILLIAM SOUND. 98 7 6 17 40 12.20 60 2.16N 153 4.29W 0.0 -0.1 0.03 1.11 10.34 117 6 7 3 D a COOK INLET. 98 7 6 17 49 45.80 64 29.28N 148 50.00W 94.4 2.3 0.30 10.88 14.64 134 8 3 15 D E CENTRAL AK. 98 7 6 18 53 51.93 61 43.27N 150 45.99W 55.1 2.1 0.10 2.45 4.69 80 14 6 29 B E COOK INLET. 98 7 6 20 52 21.86 58 11.02N 155 16.69W 1.2 1.0 0.10 1.07 3.52 89 10 5 4 B a ALASKA PEN. 98 7 6 23 38 23.57 60 12.11N 152 41.34W 95.8 2.4 0.20 3.29 5.95 62 14 4 20 C E COOK INLET. 98 7 7 1 49 21.02 63 4.74N 150 56.85W 133.1 2.5 0.19 2.57 3.34 93 15 11 53 B E CENTRAL AK. 98 7 7 1 53 30.16 60 9.78N 152 51.28W 110.7 0.29 2.14 3.09 114 16 12 11 B E COOK INLET. 98 7 7 3 29 36.48 60 12.61N 152 43.86W 0.5 1.3 0.26 0.85 1.43 117 13 11 19 A E COOK INLET. 98 7 7 9 31 50.19 62 51.06N 149 56.79W 79.6 2.7 0.23 1.41 1.36 108 16 15 21 A E CENTRAL AK. 98 7 7 10 22 50.09 60 34.21N 145 28.26W 1.9 1.5 0.18 1.31 3.35 107 13 11 48 B E PR WILLIAM SOUND. 98 7 7 10 23 5.19 63 15.59N 151 5.56W 0.8 1.6 0.25 4.20 14.52 214 10 3 34 D E CENTRAL AK. 98 7 7 11 13 30.24 60 5.66N 152 7.58W 77.4 2.0 0.29 2.72 4.47 91 16 13 46 B E COOK INLET. 98 7 7 11 26 22.21 60 20.68N 151 48.28W 12.8 1.8 0.24 0.76 1.48 87 17 7 42 A E KENAI PEN. 98 7 7 11 39 20.11 60 33.76N 145 25.36W 5.8 1.7 0.12 2.55 7.23 106 15 4 46 C E PR WILLIAM SOUND. 98 7 7 14 20 4.47 60 16.53N 151 0.88W 37.8 2.9 0.37 0.67 2.47 71 21 13 30 A E KENAI PEN. 98 7 7 21 21 47.02 59 59.72N 153 3.67W 2.6 0.8 0.10 0.88 1.27 138 8 8 2 A a COOK INLET. 98 7 8 0 57 21.62 60 33.61N 150 29.16W 14.2 2.0 0.14 4.94 15.63 112 8 5 62 D E KENAI PEN. 98 7 8 2 6 54.76 59 56.21N 153 42.70W 162.0 3.0 0.15 6.55 8.70 122 14 3 32 C E COOK INLET. 98 7 8 3 36 28.32 60 47.49N 147 30.26W 23.7 1.7 0.35 1.42 1.90 65 15 6 24 A E PR WILLIAM SOUND. 98 7 8 4 7 27.71 58 29.77N 150 53.20W 5.2 2.4 0.29 7.46 11.38 163 11 4 88 D E GULF OF ALASKA. 98 7 8 4 31 55.58 59 1.99N 152 44.04W 61.7 2.2 0.20 4.35 8.46 77 11 7 51 C E COOK INLET. 98 7 8 5 27 12.12 62 1.02N 149 27.00W 0.0 1.7 0.07 2.77 9.87 107 8 4 47 C E CENTRAL AK. 98 7 8 7 10 54.97 62 9.18N 148 50.66W 39.8 1.9 0.18 3.93 7.30 78 14 10 47 C E CENTRAL AK. 98 7 8 8 18 57.87 52 13.92N 178 31.32E 117.3 4.8mb R RAT ISLS. 98 7 8 8 18 58.74 52 56.07N 178 45.65E 13.9 4.2 0.12 29.16 19.49 163 15 2 315 D E RAT ISLS. 98 7 8 10 6 58.68 62 34.89N 148 50.90W 53.5 1.9 0.17 2.31 12.93 61 14 10 60 D E CENTRAL AK. 98 7 8 11 25 49.49 58 14.38N 142 43.08W 10.0G 2.3 0.23 44.50 58.42 285 14 5 212 D E GULF OF ALASKA. 98 7 8 12 48 26.24 60 55.63N 152 38.11W 125.9 2.8 0.16 7.07 6.54 97 16 4 44 C E COOK INLET. 98 7 8 20 21 43.09 63 16.71N 151 5.80W 11.5 2.4 0.10 2.23 3.95 76 10 4 32 B E CENTRAL AK. 98 7 9 3 33 43.81 61 41.11N 149 34.39W 26.5 1.5 0.27 1.52 2.38 149 14 9 17 A E COOK INLET. 98 7 9 5 2 12.88 62 35.42N 149 48.21W 65.3 3.2 0.37 1.39 3.20 65 17 7 44 B E CENTRAL AK. 98 7 9 7 55 21.08 57 55.46N 152 15.63W 37.6 2.9 0.14 5.32 7.04 170 20 5 24 C E KODIAK IS REG. 98 7 9 13 46 49.63 59 38.33N 140 7.68W 21.1 2.6 0.30 1.87 4.27 178 14 10 25 B YAKUTAT BAY. 98 7 9 14 57 52.20 62 16.12N 151 10.60W 0.0 2.5 0.41 2.72 1.87 212 15 7 49 B E CENTRAL AK. 98 7 9 17 5 28.43 60 39.52N 151 54.83W 96.2 2.0 0.13 5.28 5.98 147 8 3 29 C E KENAI PEN. 98 7 9 19 39 46.57 60 23.44N 152 49.27W 133.6 6.4 0.36 2.41 5.28 93 17 3 13 C COOK INLET. _____________________________________________________________________________________________________________________________________________________ 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 9 19 50 18.38 60 23.09N 153 3.35W 139.6 3.9 0.23 2.54 2.87 77 28 14 21 B E COOK INLET. 98 7 9 20 4 14.86 61 38.89N 151 29.83W 69.3 2.3 0.32 1.73 3.58 55 17 11 37 B E COOK INLET. 98 7 9 21 45 15.71 60 3.34N 153 3.46W 0.0 -0.5 0.33 1.83 2.95 89 5 4 1 B a COOK INLET. 98 7 9 22 12 56.50 59 31.74N 150 17.65W 16.2 1.6 0.07 4.27 7.53 228 4 3 43 C E KENAI PEN. 98 7 9 22 40 45.67 61 40.33N 149 41.04W 5.1 0.23 4.19 9.14 135 5 2 31 C E COOK INLET. 98 7 9 23 5 58.17 60 9.52N 148 23.14W 20.0 2.4 0.27 1.89 3.67 134 15 7 32 B E KENAI PEN. 98 7 10 1 51 36.44 60 43.68N 151 34.57W 67.1 2.0 0.17 1.89 3.27 55 13 4 19 B E KENAI PEN. 98 7 10 1 56 12.23 60 39.33N 152 9.33W 78.1 2.7 0.16 3.14 6.27 79 15 5 16 C E COOK INLET. 98 7 10 1 59 9.45 60 49.95N 140 19.09W 5.6 1.7 0.37 11.18 7.06 184 14 4 57 D E YAKUTAT BAY. 98 7 10 8 41 32.92 60 51.44N 143 58.87W 20.2 1.4 0.13 1.11 25.14 69 16 7 47 D E CAPE YAKATAGA. 98 7 10 9 48 55.70 55 18.59N 158 53.82W 51.2 4.2 0.16 10.70 11.54 214 17 6 102 D E ALASKA PEN. 98 7 10 15 29 17.82 61 33.49N 146 24.67W 31.7 2.0 0.28 1.39 2.19 80 13 5 27 A E PR WILLIAM SOUND. 98 7 10 15 48 32.24 61 30.52N 146 25.39W 21.8 1.5 0.16 2.71 8.21 74 13 4 27 C E PR WILLIAM SOUND. 98 7 10 16 51 47.68 61 6.41N 143 11.51W 0.0 0.0 0.40 10.72 23.01 143 5 3 39 D E CAPE YAKATAGA. 98 7 11 2 29 49.66 61 23.11N 146 39.76W 15.8 1.4 0.25 0.70 2.47 108 12 10 33 A E PR WILLIAM SOUND. 98 7 11 3 42 50.60 63 33.62N 150 44.44W 10.4 2.4 0.35 1.73 1.16 96 15 7 9 A E CENTRAL AK. 98 7 11 5 42 57.18 63 32.43N 150 47.38W 11.9 2.3 0.34 1.85 1.58 114 15 8 7 A E CENTRAL AK. 98 7 11 14 58 31.40 59 59.12N 153 18.43W 126.8 2.5 0.16 2.97 3.08 69 19 12 13 B E COOK INLET. 98 7 11 22 15 9.81 63 16.33N 151 3.17W 5.0 2.1 0.20 2.74 4.95 203 15 3 32 B E CENTRAL AK. 98 7 12 0 36 6.38 63 0.40N 150 57.61W 109.2 2.3 0.14 4.46 8.03 75 14 7 60 C E CENTRAL AK. 98 7 12 0 47 16.54 63 2.10N 150 28.67W 103.7 1.8 0.32 9.15 10.28 168 12 5 43 D E CENTRAL AK. 98 7 12 11 15 58.24 52 49.32N 174 45.18W 184.6 5.1mb R ANDREANOF ISLS. 98 7 12 13 59 49.09 62 5.66N 152 15.95W 137.0 2.7 0.19 4.68 14.49 85 16 5 102 D E CENTRAL AK. 98 7 12 14 21 4.01 61 29.51N 149 43.40W 36.4 1.4 0.34 5.39 7.55 93 10 5 20 C E COOK INLET. 98 7 12 15 37 57.05 59 50.41N 151 41.32W 47.5 3.2 0.22 0.92 2.21 47 30 9 20 A E KENAI PEN.