ssued: [April 21, 1998 Prepared by: Nan Macgregor-Scott No. 14 - 98 The following is a list of significant earthquakes during the time period April 13 - 19, 1998 April 13 at 15:53 UTC (07:53 am ADT), mb 4.4, 52 N 53Õ, 170 E 59Õ, depth fixed at 33 km (21 mi): A light earthquake was located by NEIC in the Near Islands region of Alaska about 94 mi (151 km) W of Attu 132 mi (212 km) W of Shemya Is 211 mi (340 km) WNW of Buldir Is 245 mi (393 km) ESE of Bering Is, Komandorsky 353 mi (568 km) WNW of Amchitka April 15 at 10:25 UTC (02:25 am ADT), ML 3.7, 53 N 20Õ, 164 W 22Õ, depth = 31 km (19 mi): A minor earthquake was located in the Unimak Island region of Alaska about 80 mi (129 km) SE of Akutan 96 mi (155 km) ESE of Dutch Harbor 97 mi (155 km) ESE of Unalaska 112 mi (180 km) SSW of False Pass 145 mi (233 km) SSW of Cold Bay April 15 at 13:28 UTC (05:28 am ADT), ML 3.7, 62 N 21Õ, 151 W 5Õ, depth = 77 km (48 mi): A minor earthquake was located in the central region of Alaska about 28 mi ( 45 km) N of Skwentna 31 mi ( 51 km) W of Talkeetna 54 mi ( 87 km) NW of Willow 70 mi (113 km) NW of Hatcher Pass 76 mi (122 km) NW of Wasilla April 16 at 00:13 UTC (04:13 pm ADT), ML 3.5, 59 N 49Õ, 152 W 11Õ, depth = 63 km (39 mi): A minor earthquake was located in the Cook Inlet region of Alaska about 13 mi ( 20 km) WNW of Anchor Point 24 mi ( 39 km) SW of Ninilchik 25 mi ( 41 km) WNW of Homer 31 mi ( 50 km) NNW of Seldovia 33 mi ( 53 km) NNW of English Bay April 16 at 07:56 UTC (11:56 pm ADT), ML 3.9, 62 N 6Õ, 147 W 15Õ, depth = 39 km (24 mi): A minor earthquake was located in the central region of Alaska about 55 mi ( 89 km) W of Glennallen 57 mi ( 92 km) W of Pump Station #11 61 mi ( 97 km) ENE of Sutton 64 mi (103 km) W of Copper Center 64 mi (104 km) WSW of Gakona April 17 at 21:20 UTC (01:20 pm ADT), ML 3.8, 61 N 30Õ, 151 W 26Õ, depth = 75 km (46 mi): A minor earthquake, felt lightly in Tyonek, was located in the Cook Inlet region of Alaska about 32 mi ( 51 km) NNW of Tyonek 33 mi ( 52 km) SSW of Skwentna 49 mi ( 79 km) WSW of Willow 55 mi ( 88 km) WNW of Anchorage 58 mi ( 93 km) WNW of Elmendorf AFB April 19 at 03:49 UTC (07:49 pm ADT), ML 4.4, 56 N 51Õ, 154 W 3Õ, depth = 10 km (6 mi): A light earthquake was located in the Kodiak Island region of Alaska about 37 mi ( 60 km) SW of Old Harbor 48 mi ( 77 km) S of Larsen Bay 52 mi ( 84 km) SSE of Karluk 83 mi (134 km) SSW of Port Lions 90 mi (144 km) SW of Kodiak _____________________________________________________________________________________________________________________________________________________ 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 4 13 1 19 25.75 62 24.86N 151 46.47W 99.1 3.3 0.29 2.14 5.27 61 19 6 78 C E CENTRAL AK. 98 4 13 2 45 32.92 63 1.40N 149 36.67W 83.6 2.4 0.12 4.03 3.95 64 15 6 5 B E CENTRAL AK. 98 4 13 2 58 2.91 61 27.34N 146 30.27W 15.6 2.2 0.13 0.98 2.89 54 16 5 31 B E PR WILLIAM SOUND. 98 4 13 6 16 9.63 60 33.12N 150 51.19W 14.0 2.6 0.32 0.97 1.86 59 15 6 30 A E KENAI PEN. 98 4 13 7 19 15.15 59 36.21N 152 22.44W 65.5 2.0 0.13 5.01 8.00 68 14 5 42 C E COOK INLET. 98 4 13 8 45 19.86 60 32.62N 150 53.13W 14.2 1.6 0.12 3.88 2.92 77 13 3 29 B E KENAI PEN. 98 4 13 9 56 50.34 62 40.66N 151 10.58W 83.4 1.8 0.13 7.50 17.02 89 13 3 56 D E CENTRAL AK. 98 4 13 10 15 32.18 61 27.05N 146 38.84W 24.8 2.6 0.21 0.89 2.12 84 13 6 39 A E PR WILLIAM SOUND. 98 4 13 11 43 38.65 60 58.83N 146 57.49W 21.6 1.1 0.13 1.82 3.46 82 12 4 13 B E PR WILLIAM SOUND. 98 4 13 11 51 50.43 60 1.51N 151 9.19W 36.4 1.3 0.17 4.16 4.09 69 12 3 8 B E KENAI PEN. 98 4 13 12 6 0.49 62 13.03N 150 9.20W 9.2 1.8 0.20 4.33 2.95 57 13 4 22 B E CENTRAL AK. 98 4 13 12 45 0.99 60 9.60N 151 58.46W 56.2 1.4 0.22 6.51 12.58 70 10 4 40 D E KENAI PEN. 98 4 13 12 45 25.35 62 11.77N 148 34.44W 34.0 1.0 0.06 10.91 21.30 97 9 3 45 D E CENTRAL AK. 98 4 13 15 35 10.57 59 7.52N 151 20.42W 30.0 2.2 0.14 6.12 7.15 143 15 4 41 C E KENAI PEN. 98 4 13 15 53 3.99 52 52.74N 170 59.46E 33.0N 4.4mb R NEAR ISLS. 98 4 13 16 19 18.54 61 11.72N 150 0.69W 44.0 1.2 0.17 4.45 11.74 124 11 5 25 D E COOK INLET. 98 4 13 16 35 7.46 62 48.09N 149 21.50W 70.4 1.9 0.25 4.55 9.08 71 13 6 24 C E CENTRAL AK. 98 4 13 17 2 12.94 61 8.84N 146 34.05W 15.0 0.9 0.13 7.03 8.15 91 9 4 10 C E PR WILLIAM SOUND. 98 4 13 17 23 24.47 61 7.40N 146 30.53W 17.8 0.2 0.16 23.04 13.59 128 5 4 9 D E PR WILLIAM SOUND. 98 4 13 19 24 41.58 64 50.73N 148 16.66W 16.8 1.7 0.12 2.69 4.05 89 13 6 13 B E CENTRAL AK. 98 4 13 22 11 56.61 61 27.69N 150 1.52W 45.7 1.2 0.15 5.53 7.42 91 12 4 35 C E COOK INLET. 98 4 13 22 56 32.42 63 17.65N 150 24.66W 123.6 2.8 0.19 2.77 4.09 55 17 9 19 B E CENTRAL AK. 98 4 14 4 23 30.23 61 23.19N 151 49.84W 105.1 2.3 0.25 1.47 2.10 63 16 11 13 A E COOK INLET. 98 4 14 6 36 4.53 61 48.05N 148 26.61W 12.4 1.3 0.38 1.33 1.08 179 13 13 6 A E PR WILLIAM SOUND. 98 4 14 7 0 23.37 64 4.22N 148 20.82W 107.7 2.5 0.20 1.46 2.80 52 18 12 46 B E CENTRAL AK. 98 4 14 7 57 53.82 60 58.82N 147 1.66W 15.3 1.5 0.46 0.98 1.86 70 15 8 12 A E PR WILLIAM SOUND. 98 4 14 8 46 51.62 59 49.67N 150 59.61W 39.0 3.2 0.23 1.00 1.72 71 28 23 9 A E KENAI PEN. 98 4 14 8 58 59.92 59 46.30N 153 1.20W 104.3 2.6 0.21 0.96 1.58 55 26 26 18 A E COOK INLET. 98 4 14 10 4 32.98 61 19.31N 146 46.44W 17.8 1.7 0.19 0.77 1.99 68 14 11 31 A E PR WILLIAM SOUND. 98 4 14 11 33 58.98 60 18.20N 150 36.81W 24.4 2.2 0.23 0.94 2.93 86 19 14 47 B E KENAI PEN. 98 4 14 12 33 27.07 59 36.59N 152 32.55W 74.1 3.0 0.24 1.01 1.80 67 30 25 39 A E COOK INLET. 98 4 14 13 11 22.79 61 38.19N 149 58.52W 46.8 2.3 0.28 0.94 1.85 85 17 12 5 A E COOK INLET. 98 4 14 13 17 18.09 60 41.99N 150 14.46W 42.2 1.7 0.19 1.49 6.74 64 23 15 54 C E KENAI PEN. 98 4 14 13 18 9.41 63 31.53N 150 52.37W 14.2 2.7 0.30 2.11 1.15 124 16 9 4 A E CENTRAL AK. 98 4 14 15 26 22.22 63 3.72N 150 33.35W 111.4 1.5 0.06 9.97 7.50 173 4 4 48 C E CENTRAL AK. 98 4 14 15 46 30.75 59 14.05N 152 23.23W 68.9 2.5 0.24 1.01 3.19 122 23 17 48 B E COOK INLET. 98 4 14 17 44 53.43 64 42.55N 146 42.24W 15.7 1.7 0.24 0.83 0.68 94 15 10 11 A E CENTRAL AK. 98 4 14 21 20 25.90 60 36.69N 150 37.50W 16.1 1.8 0.24 0.92 6.03 82 20 14 37 C E KENAI PEN. 98 4 15 0 5 29.18 61 29.32N 146 45.27W 7.1 0.6 0.10 8.59 25.63 127 4 3 44 D E PR WILLIAM SOUND. 98 4 15 2 59 28.25 61 45.56N 150 15.83W 40.2 2.0 0.20 3.59 6.40 85 12 7 24 C E COOK INLET. 98 4 15 5 10 38.46 63 29.95N 149 58.02W 63.4 1.2 0.52 21.01 77.82 245 11 2 128 D E CENTRAL AK. 98 4 15 5 51 27.93 60 32.74N 151 16.58W 47.5 2.3 0.20 1.79 3.07 51 15 4 22 B E KENAI PEN. 98 4 15 6 47 39.84 59 54.56N 153 18.23W 124.3 2.2 0.10 8.15 9.36 70 14 4 14 C E COOK INLET. 98 4 15 7 25 50.07 64 50.65N 147 17.30W 8.8 1.2 0.11 2.04 4.88 66 13 5 17 B E CENTRAL AK. 98 4 15 10 25 25.38 53 20.02N 164 22.32W 30.9 3.7 0.07 10.87 50.23 241 14 8 123 D E UNIMAK IS. 98 4 15 11 39 46.91 60 31.57N 150 52.87W 11.3 1.9 0.18 1.63 2.22 60 26 9 31 A E KENAI PEN. 98 4 15 13 28 34.37 62 21.05N 151 4.67W 76.8 3.7 0.25 1.29 3.64 77 18 6 42 B E CENTRAL AK. 98 4 15 22 36 2.64 59 10.47N 152 24.70W 47.9 2.2 0.13 3.52 7.23 96 14 5 52 C E COOK INLET. 98 4 16 0 13 8.93 59 48.70N 152 10.75W 63.3 3.5 0.25 0.63 2.05 41 30 26 35 A E COOK INLET. 98 4 16 1 22 44.22 61 17.21N 150 36.89W 54.6 1.9 0.23 2.82 4.95 96 18 17 56 B E 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 4 16 4 58 40.16 65 13.75N 148 31.47W 0.0 2.0 0.22 1.73 8.31 112 16 13 33 C E N CENTRAL AK. 98 4 16 7 22 13.98 60 11.96N 153 17.08W 139.6 2.1 0.23 3.41 3.97 147 16 7 18 B E COOK INLET. 98 4 16 7 54 3.91 60 1.23N 153 4.56W 0.0 -0.4 0.20 5.64 63.62 146 5 4 3 D a COOK INLET. 98 4 16 7 56 19.26 62 6.19N 147 14.56W 38.6 3.9 0.37 0.83 2.70 58 15 7 30 B E CENTRAL AK. 98 4 16 8 52 38.42 61 37.59N 146 30.91W 18.4 1.3 0.28 1.05 1.77 59 14 10 35 A E PR WILLIAM SOUND. 98 4 16 10 23 52.62 60 36.56N 152 5.89W 89.5 2.1 0.16 3.46 3.42 139 16 12 24 B E COOK INLET. 98 4 16 10 32 19.48 60 15.98N 150 34.56W 11.4 0.9 0.21 2.23 2.76 99 12 7 47 B E KENAI PEN. 98 4 16 10 32 24.25 60 7.59N 148 35.72W 22.2 1.4 0.18 1.63 4.41 151 13 6 42 B E KENAI PEN. 98 4 16 12 24 17.63 62 1.90N 150 33.39W 51.7 1.9 0.24 2.66 3.12 128 18 10 44 B E CENTRAL AK. 98 4 16 13 40 50.36 62 39.40N 150 31.67W 17.5 2.1 0.28 2.02 0.82 115 16 10 31 A E CENTRAL AK. 98 4 16 16 47 53.58 58 17.47N 154 59.68W 0.0 0.5 0.05 6.51 98.81 304 3 3 12 D a ALASKA PEN. 98 4 16 17 16 1.64 62 26.59N 149 41.23W 56.7 1.6 0.28 2.64 4.29 85 15 9 30 B E CENTRAL AK. 98 4 17 2 21 11.21 59 37.19N 151 58.78W 46.3 2.1 0.18 1.97 5.75 61 16 6 19 C E KENAI PEN. 98 4 17 5 42 49.73 63 11.68N 149 51.54W 16.6 0.9 0.15 6.61 4.20 118 7 4 27 C E CENTRAL AK. 98 4 17 5 43 31.29 63 13.81N 149 43.89W 17.0 2.3 0.13 0.81 1.07 43 23 5 29 A E CENTRAL AK. 98 4 17 5 43 50.73 63 16.07N 149 38.89W 0.0 2.1 0.17 3.74 16.72 99 12 4 32 D E CENTRAL AK. 98 4 17 5 44 18.80 63 5.75N 150 10.34W 22.0 1.3 0.37 31.31 21.29 140 5 3 30 D E CENTRAL AK. 98 4 17 5 49 32.91 59 55.00N 152 32.62W 87.0 2.4 0.11 3.61 8.28 54 13 7 29 C E COOK INLET. 98 4 17 6 4 8.78 60 36.49N 149 3.22W 13.3 0.7 0.09 11.47 8.27 147 5 4 21 D E KENAI PEN. 98 4 17 7 6 43.83 58 42.91N 154 27.75W 101.1 2.4 0.12 6.33 7.83 114 14 7 53 C E ALASKA PEN. 98 4 17 7 11 39.69 61 42.89N 146 52.94W 15.2 1.2 0.19 5.29 9.81 51 15 6 27 C E PR WILLIAM SOUND. 98 4 17 9 3 25.62 60 15.02N 152 41.04W 103.1 2.0 0.23 13.16 8.04 86 16 4 20 D E COOK INLET. 98 4 17 10 20 3.66 63 43.31N 148 27.92W 92.7 2.0 0.13 5.29 7.78 70 15 7 23 C E CENTRAL AK. 98 4 17 12 4 38.86 60 34.77N 142 46.68W 26.4 0.6 0.05 13.66 10.85 160 4 3 20 D E CAPE YAKATAGA. 98 4 17 12 8 29.29 53 32.82N 166 52.01W 0.0 2.2 0.13 12.30 12.90 302 10 6 28 D E FOX ISLS. 98 4 17 14 10 5.86 60 24.69N 147 44.94W 13.5 1.3 0.11 3.36 10.03 83 13 6 42 D E PR WILLIAM SOUND. 98 4 17 21 19 58.96 61 31.08N 151 22.74W 100.0 0.0 R COOK INLET. 98 4 17 21 20 2.03 61 30.12N 151 26.22W 74.8 3.8 0.19 1.42 2.47 62 18 6 37 A E COOK INLET. 98 4 17 23 58 1.56 61 41.17N 149 49.21W 40.1 1.8 0.21 4.17 7.35 58 11 5 5 C E COOK INLET. 98 4 18 0 47 1.41 62 15.08N 151 24.32W 0.0 1.5 0.15 44.06 35.30 265 5 4 110 D E CENTRAL AK. 98 4 18 2 54 36.02 61 7.87N 152 21.63W 4.1 0.4 0.08 2.59 1.39 148 5 5 7 B a COOK INLET. 98 4 18 3 35 22.98 60 18.31N 140 48.54W 9.6 2.5 0.25 3.67 6.02 153 14 7 79 C E YAKUTAT BAY. 98 4 18 3 50 36.69 60 25.05N 152 5.43W 82.4 1.2 0.12 16.69 9.93 146 8 8 35 D E COOK INLET. 98 4 18 5 14 48.66 54 33.30N 161 39.44W 12.4 2.3 0.20 3.78 6.57 239 12 8 60 C E ALASKA PEN. 98 4 18 5 13 25.30 61 14.13N 150 11.48W 45.8 1.6 0.23 1.84 4.89 90 15 11 34 B E COOK INLET. 98 4 18 6 17 15.98 55 28.23N 161 11.78W 95.2 2.4 0.13 2.88 3.79 172 11 9 35 B E ALASKA PEN. 98 4 18 6 47 33.78 60 7.72N 147 53.15W 13.8 2.8 0.30 2.92 6.00 187 16 10 85 C E PR WILLIAM SOUND. 98 4 18 8 55 16.35 59 52.41N 153 18.61W 120.8 2.4 0.27 2.78 2.12 116 19 15 16 B E COOK INLET. 98 4 18 10 57 35.04 60 48.25N 150 28.14W 9.2 1.7 0.22 1.78 2.48 108 14 11 42 A E KENAI PEN. 98 4 18 11 2 57.64 62 27.24N 149 15.85W 64.3 2.5 0.26 1.13 2.02 70 17 14 52 A E CENTRAL AK. 98 4 18 13 19 0.08 64 58.80N 150 12.70W 3.2 2.3 0.29 2.63 5.84 117 18 5 26 C E CENTRAL AK. 98 4 18 14 1 29.12 62 59.25N 150 55.14W 119.0 2.1 0.19 2.90 3.45 89 18 12 61 B E CENTRAL AK. 98 4 18 16 10 50.53 61 47.43N 148 14.43W 23.3 1.1 0.16 1.67 2.31 152 6 6 5 A E PR WILLIAM SOUND. 98 4 18 17 6 18.79 62 5.13N 147 13.68W 36.5 2.6 0.30 1.39 2.65 50 16 9 29 B E CENTRAL AK. 98 4 18 17 6 17.72 62 11.12N 147 11.73W 36.3 2.6 0.18 3.54 3.42 215 12 7 40 B CENTRAL AK. 98 4 18 17 42 57.71 62 13.34N 150 6.15W 4.1 1.4 0.31 2.64 3.38 60 16 6 22 B E CENTRAL AK. 98 4 18 18 30 56.86 61 35.49N 150 1.57W 36.2 1.6 0.27 1.92 2.02 97 15 10 10 A E COOK INLET. 98 4 18 21 25 39.38 61 26.15N 150 58.81W 56.2 1.7 0.21 4.25 5.23 84 17 9 57 C E COOK INLET. 98 4 18 22 49 57.38 62 0.82N 149 24.49W 42.0 2.2 0.24 1.09 3.20 73 17 6 37 B E CENTRAL AK. 98 4 18 23 36 53.53 60 3.77N 153 3.28W 1.1 0.2 0.11 4.46 1.65 164 6 3 0 B B 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 4 19 0 4 15.79 64 56.64N 151 30.77W 12.3 1.2 0.19 7.79 4.64 150 6 4 38 C E CENTRAL AK. 98 4 19 0 8 30.62 60 30.40N 151 14.11W 15.9 0.9 0.44 5.34 13.39 91 9 4 26 D E KENAI PEN. 98 4 19 0 36 45.08 63 33.42N 151 3.02W 8.3 1.5 0.16 5.83 2.35 94 11 4 6 C E CENTRAL AK. 98 4 19 1 19 48.98 53 9.98N 164 13.68W 36.1 2.9 0.15 25.73 98.93 282 12 6 143 D E UNIMAK IS. 98 4 19 1 55 58.37 59 59.70N 153 4.69W 2.2 -0.2 0.20 5.48 5.68 164 6 6 2 C a COOK INLET. 98 4 19 2 0 24.48 63 1.69N 150 26.65W 99.2 2.4 0.13 2.71 5.78 66 14 5 41 C E CENTRAL AK. 98 4 19 3 49 18.82 56 51.08N 154 3.32W 10.0G 4.4 0.17 11.27 12.56 230 15 3 137 D E KODIAK IS REG. 98 4 19 3 57 50.56 60 3.15N 151 34.33W 49.0 2.1 0.14 4.63 5.25 55 14 4 16 C E KENAI PEN. 98 4 19 4 36 22.77 61 53.34N 149 31.05W 41.3 1.7 0.17 2.60 6.27 81 11 3 33 C E COOK INLET. 98 4 19 7 11 47.01 60 26.29N 147 49.63W 15.0 1.9 0.10 2.66 7.61 79 13 6 44 C E PR WILLIAM SOUND. 98 4 19 7 36 39.89 63 19.49N 145 18.80W 6.1 1.6 0.18 3.90 6.75 85 14 4 24 C E E CENTRAL AK. 98 4 19 8 14 21.56 61 23.51N 147 8.11W 25.8 1.4 0.11 1.70 17.08 91 14 8 41 D E PR WILLIAM SOUND. 98 4 19 8 15 29.05 60 41.93N 147 14.21W 20.5 1.4 0.22 2.25 2.26 121 16 6 22 A E PR WILLIAM SOUND. 98 4 19 11 19 29.58 60 46.21N 150 51.92W 47.0 1.8 0.18 3.76 8.51 98 13 6 21 C E KENAI PEN. 98 4 19 15 50 59.39 63 8.10N 150 22.27W 116.6 2.6 0.17 3.06 5.07 62 14 5 35 C E CENTRAL AK. 98 4 19 18 49 58.83 60 16.46N 153 31.92W 178.5 2.5 0.27 12.37 14.40 116 15 3 32 D E COOK INLET. 98 4 19 19 34 49.68 60 18.94N 151 21.91W 46.2 2.0 0.11 3.73 4.99 64 14 6 31 B E KENAI PEN. 98 4 19 19 55 40.91 60 28.79N 150 52.72W 15.0 1.7 0.18 2.59 8.70 73 13 5 35 C E KENAI PEN. 98 4 19 20 35 52.37 65 12.24N 146 55.98W 20.7 1.4 0.16 3.34 1.38 116 12 7 32 B E N CENTRAL AK. 98 4 19 22 4 4.97 61 41.65N 149 33.50W 47.5 1.9 0.11 1.47 3.16 81 10 6 18 B E COOK INLET.