ssued: March 1, 1999 Prepared by: Lalitha Rao No. 09- 99 The following is a list of significant earthquakes during the time period February 22 - 28, 1999 February 22 at 12:50 UTC (03:50 am AST), ML 4.2, 57 N 50', 156 W 27', depth = 0 km (0 mi): A light earthquake was located in the Alaska Peninsula region of Alaska about 43 mi ( 69 km) SE of Egegik 46 mi ( 74 km) ENE of Pilot Point 59 mi ( 96 km) S of King Salmon 64 mi (103 km) SSE of South Naknek 65 mi (104 km) SSE of Naknek February 22 at 17:05 UTC (08:05 am AST), ML 3.8, 59 N 33', 153 W 8', depth = 116 km (72 mi): A minor earthquake was located in the Cook Inlet region of Alaska about 38 mi ( 61 km) ESE of Pedro Bay 45 mi ( 73 km) WNW of English Bay 48 mi ( 78 km) WNW of Port Graham 48 mi ( 78 km) WSW of Anchor Point 51 mi ( 82 km) W of Seldovia February 23 at 05:02 UTC (Feb.22, 08:02 pm AST), mb 4.3, 51 N 10', 168 W 22', depth fixed at 33 km (21 mi): A light earthquake was located by NEIC in the Fox Islands region of Alaska about 125 mi (201 km) S of Nikolski 177 mi (284 km) ESE of Amukta Pass 203 mi (326 km) SSW of Unalaska 204 mi (329 km) SSW of Dutch Harbor 233 mi (375 km) SSW of Akutan February 23 at 09:01 UTC (12:01 am AST), mb 4.9, 53 N 40', 171 E 9', depth fixed at 33 km (21 mi): A light earthquake was located by NEIC in the Near Islands region of Alaska about 101 mi (162 km) WNW of Attu 140 mi (226 km) WNW of Shemya Is 220 mi (354 km) WNW of Buldir Is 223 mi (359 km) ESE of Bering Is, Komandorsky 362 mi (583 km) WNW of Amchitka February 24 at 01:48 UTC (Feb.23, 04:48 pm AST), ML 4.2, 54 N 43', 161 W 26', depth = 17 km (10 mi): A light earthquake , felt lightly in King Cove, was located in the Alaska Peninsula region of Alaska about 42 mi ( 68 km) ESE of King Cove 57 mi ( 91 km) SW of Sand Point 61 mi ( 98 km) ESE of Cold Bay 80 mi (129 km) E of False Pass 89 mi (143 km) S of Nelson Lagoon February 24 at 10:47 UTC (01:47 am AST), ML 4.1, 53 N 40', 163 W 9', depth = 19 km (12 mi): A light earthquake was located in the Unimak Island region of Alaska about 82 mi (132 km) S of False Pass 102 mi (164 km) SSW of King Cove 106 mi (171 km) S of Cold Bay 112 mi (180 km) ESE of Akutan 139 mi (224 km) E of Dutch Harbor February 24 at 15:16 UTC (06:16 am AST), ML 3.7, 53 N 60', 164 W 3', depth = 31 km (19 mi): A minor earthquake was located in the Unimak Island region of Alaska about 64 mi (104 km) SSW of False Pass 71 mi (114 km) E of Akutan 98 mi (158 km) SSW of Cold Bay 101 mi (163 km) SW of King Cove 102 mi (163 km) E of Dutch Harbor February 25 at 08:41 UTC (Feb.24, 11:41 pm AST), mb 4.9, 52 N 13', 173 E 50', depth fixed at 33 km (21 mi): A light earthquake was located by NEIC in the Near Islands region of Alaska about 37 mi ( 59 km) SSW of Shemya Is 56 mi ( 90 km) SSE of Attu 90 mi (144 km) W of Buldir Is 227 mi (365 km) WNW of Amchitka 370 mi (595 km) ESE of Bering Is, Komandorsky February 25 at 20:18 UTC (11:18 am AST), ML 3.5, 57 N 55', 156 W 50', depth = 0 km (0 mi): A minor earthquake was located in the Alaska Peninsula region of Alaska about 28 mi ( 45 km) SE of Egegik 37 mi ( 60 km) NE of Pilot Point 54 mi ( 86 km) S of King Salmon 55 mi ( 89 km) S of South Naknek 56 mi ( 90 km) S of Naknek February 26 at 08:51 UTC (Feb.25, 11:51 pm AST), ML 3.4, 61 N 7', 149 W 33', depth = 34 km (21 mi): A minor earthquake, felt in Anchorage, was located in the Cook Inlet region of Alaska about 11 mi ( 17 km) SSE of Fort Richardson 12 mi ( 20 km) SE of Elmendorf AFB 14 mi ( 22 km) NNE of Hope 14 mi ( 22 km) ESE of Anchorage 15 mi ( 23 km) S of Eagle River _____________________________________________________________________________________________________________________________________________________ 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 22 4 56 26.81 60 2.02N 153 1.41W 118.6 2.9 0.21 1.82 2.12 77 20 14 4 A E COOK INLET. 99 2 22 7 36 43.55 60 39.03N 152 3.88W 80.7 1.9 0.31 2.49 2.05 57 18 12 35 A E COOK INLET. 99 2 22 7 40 21.98 60 59.62N 147 29.38W 30.0 1.1 0.18 1.02 2.97 70 14 8 25 B E PR WILLIAM SOUND. 99 2 22 10 44 27.62 62 25.45N 148 7.84W 23.8 2.6 0.18 0.89 13.60 46 15 10 69 D E CENTRAL AK. 99 2 22 12 50 49.39 57 50.12N 156 27.14W 0.4 4.2 0.32 2.08 1.93 163 16 13 57 A E ALASKA PEN. 99 2 22 12 59 19.15 60 48.29N 147 5.14W 22.1 0.8 0.23 0.84 1.23 96 13 8 8 A E PR WILLIAM SOUND. 99 2 22 14 12 58.05 59 59.71N 152 48.69W 105.8 3.1 0.26 1.28 1.51 51 19 19 12 A E COOK INLET. 99 2 22 17 5 31.03 59 33.15N 153 8.05W 115.7 3.8 0.24 1.29 2.58 72 22 15 12 B E COOK INLET. 99 2 22 18 44 19.32 60 47.57N 147 8.32W 17.5 1.1 0.39 0.75 1.14 87 14 5 10 A E PR WILLIAM SOUND. 99 2 22 19 4 13.27 59 58.33N 152 9.08W 69.2 2.0 0.31 1.90 2.29 76 15 12 45 A E COOK INLET. 99 2 22 20 36 2.05 53 31.87N 167 2.74W 2.4 3.2 0.15 6.00 3.24 315 16 12 31 C E FOX ISLS. 99 2 22 22 3 2.47 61 46.13N 149 44.90W 38.8 1.9 0.25 2.30 3.88 124 14 12 15 B E COOK INLET. 99 2 22 22 15 7.58 60 51.65N 147 13.52W 21.9 1.8 0.27 0.93 1.55 59 17 10 7 A E PR WILLIAM SOUND. 99 2 22 22 53 46.92 60 32.87N 153 25.43W 0.0 1.9 0.42 1.02 2.01 91 15 9 27 A E COOK INLET. 99 2 23 2 35 39.16 62 15.96N 151 18.43W 82.6 2.1 0.10 8.93 7.99 79 15 3 56 C E CENTRAL AK. 99 2 23 4 33 20.82 59 59.19N 148 56.38W 10.7 2.1 0.32 6.39 17.63 137 16 5 61 D E KENAI PEN. 99 2 23 5 2 43.79 51 9.66N 168 21.60W 33.0N 4.3mb R FOX ISLS. 99 2 23 5 29 25.47 60 20.07N 152 13.67W 69.0 1.9 0.20 3.71 5.92 83 15 4 31 C E COOK INLET. 99 2 23 6 10 29.92 63 26.09N 150 44.62W 146.8 2.2 0.16 7.35 8.33 66 12 4 16 C E CENTRAL AK. 99 2 23 7 48 36.36 60 4.96N 152 47.37W 91.0 1.7 0.24 6.59 7.85 59 11 4 9 C E COOK INLET. 99 2 23 8 36 8.56 60 25.80N 152 19.78W 89.7 2.2 0.36 3.88 5.89 88 15 5 24 C E COOK INLET. 99 2 23 9 1 40.30 53 40.32N 171 8.76E 33.0N 4.9mb R NEAR ISLS. 99 2 23 9 37 58.10 60 5.03N 152 48.86W 115.4 1.8 0.22 7.28 9.15 56 13 6 14 C E COOK INLET. 99 2 23 12 6 3.39 64 24.59N 147 44.00W 13.2 1.9 0.18 1.51 5.23 48 13 8 27 C E CENTRAL AK. 99 2 23 12 12 28.76 61 36.81N 146 28.24W 30.4 1.5 0.13 1.60 5.73 48 18 7 32 C E PR WILLIAM SOUND. 99 2 23 13 39 51.83 64 51.13N 149 5.01W 21.4 2.2 0.16 1.16 1.25 91 15 6 31 A E CENTRAL AK. 99 2 23 14 49 7.07 62 13.37N 150 5.24W 51.9 1.6 0.13 13.97 17.90 79 15 3 22 D E CENTRAL AK. 99 2 23 16 54 4.28 60 55.47N 147 48.39W 6.2 0.8 0.12 3.90 7.77 108 9 3 29 C E PR WILLIAM SOUND. 99 2 23 17 56 40.57 59 59.66N 147 44.09W 16.3 1.5 0.31 7.02 6.74 174 14 8 8 C E GULF OF ALASKA. 99 2 23 18 7 41.24 60 24.56N 152 56.38W 139.3 2.7 0.22 3.25 5.45 73 21 4 9 C E COOK INLET. 99 2 23 19 48 9.03 61 44.26N 150 41.12W 52.7 1.8 0.15 12.43 14.46 209 9 4 44 D E COOK INLET. 99 2 23 22 22 54.19 53 9.97N 162 4.57W 72.7 2.8 0.47 42.44 98.17 280 16 6 198 D E SOUTH OF AK. 99 2 24 0 27 16.54 61 37.45N 150 3.84W 53.2 1.4 0.16 2.89 3.06 199 17 7 10 B E COOK INLET. 99 2 24 0 27 29.69 64 48.43N 147 45.67W 12.4 1.0 0.14 1.22 2.03 105 7 6 18 A E CENTRAL AK. 99 2 24 1 48 38.40 54 43.24N 161 25.51W 16.6 4.2 0.26 2.16 3.60 197 16 9 55 B E ALASKA PEN. 99 2 24 2 50 48.95 59 33.19N 151 44.18W 60.7 1.8 0.29 1.77 3.92 142 15 13 13 B E KENAI PEN. 99 2 24 3 24 8.21 59 50.95N 150 46.87W 50.2 1.2 0.18 2.72 2.89 131 11 6 11 B E KENAI PEN. 99 2 24 5 42 38.03 65 13.81N 147 17.38W 14.2 1.9 0.18 1.23 2.27 96 14 5 27 A E N CENTRAL AK. 99 2 24 6 56 23.99 61 46.17N 150 40.61W 45.2 3.3 0.25 1.58 3.30 65 19 12 44 B E COOK INLET. 99 2 24 8 36 56.01 60 56.81N 147 1.45W 26.2 0.7 0.11 1.36 2.36 99 11 6 8 A E PR WILLIAM SOUND. 99 2 24 9 43 25.84 60 35.45N 150 15.24W 18.9 2.3 0.18 1.89 4.46 87 16 12 50 B E KENAI PEN. 99 2 24 10 47 39.80 53 40.35N 163 8.73W 19.3 4.1 0.17 25.46 51.60 256 14 6 115 D E UNIMAK IS. 99 2 24 11 50 47.79 60 29.67N 147 2.09W 20.0 1.2 0.23 0.93 7.34 128 16 9 35 C E PR WILLIAM SOUND. 99 2 24 15 16 16.13 53 59.84N 164 2.54W 31.3 3.7 0.24 5.98 12.88 229 19 8 64 D E UNIMAK IS. 99 2 24 15 34 54.74 63 6.81N 151 0.28W 130.2 2.4 0.27 1.25 1.54 71 17 11 49 A E CENTRAL AK. 99 2 24 16 34 0.89 60 46.20N 146 9.47W 17.9 1.7 0.16 0.82 1.57 92 17 7 24 A E PR WILLIAM SOUND. 99 2 24 17 20 1.20 54 34.50N 161 41.81W 1.5 2.8 0.30 2.11 1.95 209 17 14 57 A E ALASKA PEN. 99 2 24 19 19 58.29 59 48.51N 152 51.32W 94.9 3.2 0.24 1.13 2.06 60 19 17 20 A E COOK INLET. 99 2 24 20 32 42.61 65 0.05N 150 13.66W 9.0 1.3 0.09 5.89 3.09 174 4 3 24 C E N CENTRAL AK. 99 2 25 2 18 10.40 61 26.17N 147 30.58W 33.4 2.5 0.22 0.80 2.54 58 20 5 31 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 _____________________________________________________________________________________________________________________________________________________ 99 2 25 5 47 56.55 63 5.83N 150 37.21W 117.8 2.2 0.12 5.57 7.36 70 11 3 43 C E CENTRAL AK. 99 2 25 5 51 0.34 61 23.15N 146 34.23W 14.8 2.7 0.11 0.98 7.02 57 17 4 31 C E PR WILLIAM SOUND. 99 2 25 6 8 33.19 60 25.18N 144 35.28W 22.2 1.1 0.12 2.95 2.79 63 14 7 6 B E CAPE YAKATAGA. 99 2 25 6 31 1.98 62 59.30N 150 0.72W 88.4 2.1 0.12 2.76 5.41 74 15 5 19 C E CENTRAL AK. 99 2 25 6 39 0.30 61 59.57N 151 30.22W 86.4 2.1 0.10 8.24 8.16 85 13 3 79 C E COOK INLET. 99 2 25 8 41 16.82 52 12.66N 173 49.68E 33.0N 4.9mb R NEAR ISLS. 99 2 25 9 57 1.64 62 55.05N 149 2.00W 72.2 2.9 0.12 1.39 3.68 68 16 3 31 B E CENTRAL AK. 99 2 25 16 11 3.76 60 29.20N 147 22.44W 20.3 1.3 0.11 3.58 34.02 63 14 5 46 D E PR WILLIAM SOUND. 99 2 25 17 23 19.69 60 19.76N 152 5.43W 82.8 1.8 0.12 6.65 10.76 120 14 3 39 D E COOK INLET. 99 2 25 19 30 23.40 61 14.63N 150 16.51W 39.0 1.9 0.13 4.74 4.64 63 15 4 10 B E COOK INLET. 99 2 25 19 42 3.83 61 17.30N 150 9.20W 40.4 2.9 0.19 1.39 2.08 61 17 4 14 A E COOK INLET. 99 2 25 20 18 4.12 57 55.14N 156 50.12W 0.0 3.5 0.23 2.76 1.94 146 19 4 68 B E ALASKA PEN. 99 2 25 20 26 34.93 63 11.07N 151 20.72W 13.0 2.6 0.18 3.96 3.79 103 17 3 46 B E CENTRAL AK. 99 2 25 20 29 17.06 62 34.94N 149 32.46W 61.6 1.8 0.17 6.05 9.71 69 15 5 42 C E CENTRAL AK. 99 2 25 21 30 33.15 59 10.60N 152 48.51W 63.9 1.4 0.43 9.45 16.49 107 13 4 41 D E COOK INLET. 99 2 26 0 22 13.98 62 54.96N 149 35.42W 79.4 2.2 0.19 3.09 3.76 61 17 7 7 B E CENTRAL AK. 99 2 26 0 36 17.17 62 20.97N 147 26.80W 33.0 1.9 0.20 1.37 2.93 52 15 7 58 B E CENTRAL AK. 99 2 26 7 35 32.64 60 24.38N 151 49.33W 70.4 1.7 0.27 1.98 4.93 106 14 9 49 B E KENAI PEN. 99 2 26 7 49 9.35 62 59.67N 149 25.33W 83.0 2.3 0.16 2.04 2.48 59 15 10 11 A E CENTRAL AK. 99 2 26 8 17 43.58 57 17.56N 154 52.50W 62.1 2.9 0.20 3.36 8.54 190 16 9 94 C E KODIAK IS REG. 99 2 26 8 51 4.17 61 6.66N 149 33.44W 34.1 3.4 0.28 0.79 1.86 63 15 9 15 A E COOK INLET. 99 2 26 9 24 15.24 63 27.81N 145 31.60W 9.9 2.5 0.36 1.32 1.60 97 15 10 12 A E E CENTRAL AK. 99 2 26 12 37 10.45 60 27.13N 152 22.10W 91.5 2.2 0.36 2.35 3.82 65 16 9 22 B E COOK INLET. 99 2 26 13 53 0.08 61 22.91N 150 24.39W 41.7 2.0 0.27 1.55 2.22 61 17 11 27 A E COOK INLET. 99 2 26 16 6 4.56 63 8.47N 150 33.73W 115.2 2.1 0.22 5.84 5.42 212 16 5 37 C E CENTRAL AK. 99 2 26 16 17 36.97 62 34.23N 150 55.12W 96.7 0.8 0.09 10.55 6.70 226 7 3 38 D E CENTRAL AK. 99 2 26 17 2 57.09 54 59.06N 162 18.63W 86.8 2.9 0.39 2.95 3.13 127 17 12 4 B E ALASKA PEN. 99 2 26 17 14 45.00 60 6.26N 153 10.37W 153.1 2.6 0.25 6.36 3.95 136 15 8 8 C E COOK INLET. 99 2 26 21 46 58.35 60 6.10N 153 21.15W 155.8 2.8 0.24 2.61 3.50 79 16 10 17 B E COOK INLET. 99 2 26 22 6 5.76 62 46.75N 148 44.63W 58.8 3.0 0.27 0.99 3.14 54 16 9 51 B E CENTRAL AK. 99 2 26 23 43 1.65 60 23.99N 152 27.95W 90.2 3.2 0.20 2.24 1.46 65 17 12 17 A E COOK INLET. 99 2 27 1 45 15.07 61 20.36N 150 42.58W 43.9 2.2 0.24 5.27 14.33 92 14 7 56 D E COOK INLET. 99 2 27 4 58 14.82 60 11.41N 153 13.51W 127.0 2.3 0.15 5.57 6.89 95 13 6 17 C E COOK INLET. 99 2 27 6 30 46.58 60 18.76N 150 57.93W 54.8 1.6 0.45 5.11 20.88 77 13 5 35 D E KENAI PEN. 99 2 27 7 21 4.09 61 2.90N 146 57.40W 11.0 0.6 0.14 3.51 6.09 63 11 5 19 C E PR WILLIAM SOUND. 99 2 27 7 37 58.99 60 38.86N 151 58.96W 79.7 2.9 0.25 1.51 2.76 63 16 7 39 B E KENAI PEN. 99 2 27 8 50 16.42 60 21.72N 150 49.56W 41.8 1.8 0.32 4.32 21.56 82 12 5 44 D E KENAI PEN. 99 2 27 8 50 39.14 63 13.91N 151 5.88W 4.5 1.6 0.14 7.79 16.61 155 10 4 47 D E CENTRAL AK. 99 2 27 10 2 46.86 60 24.58N 150 58.23W 44.7 2.1 0.13 3.93 7.25 74 13 4 40 C E KENAI PEN. 99 2 27 10 11 31.20 60 35.63N 147 33.18W 3.0 1.3 0.26 3.11 9.05 85 12 3 41 C E PR WILLIAM SOUND. 99 2 27 11 10 48.70 61 25.15N 146 45.52W 17.7 1.1 0.12 3.52 11.06 57 14 4 39 D E PR WILLIAM SOUND. 99 2 27 12 6 58.85 60 36.58N 147 32.53W 10.0 1.4 0.14 3.00 10.77 83 14 4 39 D E PR WILLIAM SOUND. 99 2 27 12 9 38.65 60 33.06N 147 34.06W 0.0 1.9 0.43 3.68 5.15 71 17 7 45 C E PR WILLIAM SOUND. 99 2 27 12 57 15.77 64 49.38N 147 16.65W 1.7 1.1 0.08 1.24 13.51 62 12 4 19 D E CENTRAL AK. 99 2 27 16 1 15.03 60 16.58N 151 39.50W 61.3 2.1 0.21 3.31 12.40 63 16 3 33 D E KENAI PEN. 99 2 27 16 1 18.63 60 37.05N 147 32.19W 10.5 1.6 0.12 3.22 5.62 82 11 7 38 C E PR WILLIAM SOUND. 99 2 27 16 13 50.47 59 42.17N 153 27.22W 134.1 2.8 0.09 3.67 7.47 62 13 7 14 C E COOK INLET. 99 2 27 17 1 35.72 64 29.24N 150 42.46W 24.4 2.5 0.34 1.32 11.01 82 15 6 61 D E CENTRAL AK. 99 2 27 21 12 31.96 58 54.87N 152 39.64W 51.2 2.2 0.19 4.74 10.79 92 14 6 37 D E KODIAK IS REG. 99 2 27 21 50 15.70 59 51.76N 152 48.02W 90.3 1.8 0.18 7.06 12.87 58 13 3 18 D 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 _____________________________________________________________________________________________________________________________________________________ 99 2 28 4 14 9.52 58 41.12N 143 39.97W 10.0G 2.5 0.14 46.04 66.65 278 14 2 145 D E GULF OF ALASKA. 99 2 28 5 17 3.70 60 33.20N 141 14.06W 25.2 2.1 0.41 1.65 18.03 133 14 8 46 D E YAKUTAT BAY. 99 2 28 6 15 16.26 60 28.88N 152 20.11W 89.9 1.9 0.16 2.86 5.36 84 15 10 23 C E COOK INLET. 99 2 28 8 35 57.15 62 24.75N 148 12.28W 8.2 1.7 0.12 1.36 7.50 73 16 6 68 C E CENTRAL AK. 99 2 28 18 38 36.52 59 57.86N 152 51.87W 94.6 3.2 0.30 1.01 1.31 52 22 17 10 A E COOK INLET.