2021-12-25 14:36:00 (M5.3) Pacific-Antarctic Ridge -56.0 -144.3 (70fa9)

M5.3 Earthquake - Pacific-Antarctic Ridge

Preliminary Report

Magnitude	5.3
Date-Time	25 Dec 2021 14:36:01 UTC 25 Dec 2021 04:36:01 near epicenter 25 Dec 2021 20:06:01 standard time in your timezone
Location	55.991S 144.313W
Depth	10 km
Distances	2637.7 km (1635.4 mi) ESE of Waitangi, New Zealand 3300.5 km (2046.3 mi) E of Dunedin, New Zealand 3323.3 km (2060.5 mi) E of Oamaru, New Zealand 3328.6 km (2063.7 mi) E of Christchurch, New Zealand 3333.1 km (2066.5 mi) ESE of Masterton, New Zealand
Location Uncertainty	Horizontal: 12.3 km; Vertical 1.2 km
Parameters	Nph = 36; Dmin = 3159.8 km; Rmss = 1.10 seconds; Gp = 54° Version =
Event ID	us 6000gf8r

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2021-12-25 12:39:05 (M5.4) Fiji region -17.5 -177.2 (70fa9)

M5.4 Earthquake - Fiji region

Preliminary Report

Magnitude	5.4
Date-Time	25 Dec 2021 12:39:06 UTC 26 Dec 2021 01:39:06 near epicenter 25 Dec 2021 18:09:06 standard time in your timezone
Location	17.464S 177.202W
Depth	235 km
Distances	362.2 km (224.6 mi) SSE of Alo, Wallis and Futuna 383.1 km (237.5 mi) ESE of Labasa, Fiji 457.9 km (283.9 mi) NNW of Nuku�alofa, Tonga 467.9 km (290.1 mi) E of Suva, Fiji 544.2 km (337.4 mi) E of Ba, Fiji
Location Uncertainty	Horizontal: 14.4 km; Vertical 7.1 km
Parameters	Nph = 64; Dmin = 1701.9 km; Rmss = 1.58 seconds; Gp = 80° Version =
Event ID	us 6000gf7t

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2021-12-25 12:39:09 UPDATED: (M5.9) Tonga -17.0 -173.5 (70fa9)

M5.9 Earthquake - Tonga

Preliminary Report

Magnitude	5.9
Date-Time	25 Dec 2021 12:39:09 UTC 26 Dec 2021 01:39:09 near epicenter 25 Dec 2021 18:09:09 standard time in your timezone
Location	17.019S 173.512W
Depth	8 km
Distances	121.7 km (75.4 mi) SSE of Hihifo, Tonga 399.2 km (247.5 mi) SSW of Apia, Samoa 421.6 km (261.4 mi) SW of T?funa, American Samoa 427.5 km (265.0 mi) SW of Pago Pago, American Samoa 489.5 km (303.5 mi) NNE of Nuku�alofa, Tonga
Location Uncertainty	Horizontal: 9.6 km; Vertical 4.5 km
Parameters	Nph = 131; Dmin = 390.7 km; Rmss = 0.58 seconds; Gp = 41° Version =
Event ID	us 6000gf7u

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2021-12-25 12:19:56 (M5.0) Vanuatu -18.9 169.2 (70fa9)

M5.0 Earthquake - Vanuatu

Preliminary Report

Magnitude	5.0
Date-Time	25 Dec 2021 12:19:57 UTC 25 Dec 2021 23:19:57 near epicenter 25 Dec 2021 17:49:57 standard time in your timezone
Location	18.917S 169.223E
Depth	217 km
Distances	69.4 km (43.0 mi) N of Isangel, Vanuatu 162.2 km (100.6 mi) SE of Port-Vila, Vanuatu 301.7 km (187.1 mi) NE of W�, New Caledonia 435.1 km (269.8 mi) SSE of Luganville, Vanuatu 460.3 km (285.4 mi) NE of Dumb�a, New Caledonia
Location Uncertainty	Horizontal: 5.0 km; Vertical 7.4 km
Parameters	Nph = 60; Dmin = 439.6 km; Rmss = 0.56 seconds; Gp = 74° Version =
Event ID	us 6000gf7p

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2021-12-25 09:20:12 (M5.4) South Indian Ocean -36.4 53.3 (70fa9)

M5.4 Earthquake - South Indian Ocean

Preliminary Report

Magnitude	5.4
Date-Time	25 Dec 2021 09:20:13 UTC 25 Dec 2021 13:20:13 near epicenter 25 Dec 2021 14:50:13 standard time in your timezone
Location	36.357S 53.313E
Depth	10 km
Distances	1393.4 km (863.9 mi) SSE of T�lanaro, Madagascar 1418.2 km (879.3 mi) SSE of Ambovombe, Madagascar 1419.1 km (879.8 mi) SSE of Amboasary, Madagascar 1435.3 km (889.9 mi) SSE of Tsiombe, Madagascar 1459.1 km (904.6 mi) SE of Kopoky, Madagascar
Location Uncertainty	Horizontal: 9.7 km; Vertical 1.8 km
Parameters	Nph = 80; Dmin = 1125.7 km; Rmss = 0.62 seconds; Gp = 17° Version =
Event ID	us 6000gf6p

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2021-12-24 21:39:23 (M5.0) South Sandwich Islands region -58.0 -23.1 (70fa9)

M5.0 Earthquake - South Sandwich Islands region

Preliminary Report

Magnitude	5.0
Date-Time	24 Dec 2021 21:39:24 UTC 24 Dec 2021 19:39:24 near epicenter 25 Dec 2021 03:09:24 standard time in your timezone
Location	58.024S 23.098W
Depth	10 km
Distances	2460.2 km (1525.3 mi) SSW of Edinburgh of the Seven Seas, Saint Helena 2760.3 km (1711.4 mi) ENE of Ushuaia, Argentina 2776.8 km (1721.6 mi) E of R�o Grande, Argentina 2985.5 km (1851.0 mi) E of R�o Gallegos, Argentina 2997.0 km (1858.1 mi) E of Punta Arenas, Chile
Location Uncertainty	Horizontal: 8.3 km; Vertical 1.6 km
Parameters	Nph = 46; Dmin = 929.4 km; Rmss = 0.80 seconds; Gp = 49° Version =
Event ID	us 6000gf4f

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2021-12-24 21:34:02 (M5.0) New Guinea, Papua New Guinea -6.0 142.4 (70fa9)

M5.0 Earthquake - New Guinea, Papua New Guinea

Preliminary Report

Magnitude	5.0
Date-Time	24 Dec 2021 21:34:03 UTC 25 Dec 2021 08:34:03 near epicenter 25 Dec 2021 03:04:03 standard time in your timezone
Location	5.956S 142.357E
Depth	10 km
Distances	66.4 km (41.2 mi) W of Tari, Papua New Guinea 119.5 km (74.1 mi) E of Kiunga, Papua New Guinea 145.4 km (90.1 mi) W of Mendi, Papua New Guinea 207.7 km (128.8 mi) W of Mount Hagen, Papua New Guinea 301.4 km (186.8 mi) SSW of Wewak, Papua New Guinea
Location Uncertainty	Horizontal: 9.6 km; Vertical 1.6 km
Parameters	Nph = 32; Dmin = 1169.7 km; Rmss = 1.01 seconds; Gp = 69° Version =
Event ID	us 6000gf49

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2021-12-24 13:43:22 (M5.7) China-Laos border region 22.4 101.7 (70fa9)

M5.7 Earthquake - China-Laos border region

Preliminary Report

Magnitude	5.7
Date-Time	24 Dec 2021 13:43:23 UTC 24 Dec 2021 20:43:23 near epicenter 24 Dec 2021 19:13:23 standard time in your timezone
Location	22.364N 101.688E
Depth	10 km
Distances	86.8 km (53.8 mi) NNW of Ph�ngsali, Laos 106.7 km (66.2 mi) ENE of Jinghong, China 154.4 km (95.7 mi) WNW of M??ng Lay, Vietnam 175.4 km (108.8 mi) NW of Dien Bien Phu, Vietnam 186.6 km (115.7 mi) SW of Gejiu, China
Location Uncertainty	Horizontal: 3.8 km; Vertical 1.8 km
Parameters	Nph = 127; Dmin = 247.4 km; Rmss = 0.64 seconds; Gp = 21° Version =
Event ID	us 6000gf1y

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2021-12-24 10:57:43 (M5.3) Gulf of Aden 14.8 52.2 (70fa9)

M5.3 Earthquake - Gulf of Aden

Preliminary Report

Magnitude	5.3
Date-Time	24 Dec 2021 10:57:43 UTC 24 Dec 2021 13:57:43 near epicenter 24 Dec 2021 16:27:43 standard time in your timezone
Location	14.825N 52.181E
Depth	10 km
Distances	153.0 km (94.9 mi) S of Al Ghayz?ah, Yemen 317.2 km (196.6 mi) SW of ?al?lah, Oman 330.7 km (205.0 mi) E of Mukalla, Yemen 348.8 km (216.3 mi) NNE of Bereeda, Somalia 447.5 km (277.4 mi) NE of Qandala, Somalia
Location Uncertainty	Horizontal: 3.8 km; Vertical 1.8 km
Parameters	Nph = 80; Dmin = 1074.3 km; Rmss = 0.75 seconds; Gp = 55° Version =
Event ID	us 6000gf1c

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2021-12-24 01:41:22 (M5.1) Pacific-Antarctic Ridge -54.2 -136.6 (70fa9)

M5.1 Earthquake - Pacific-Antarctic Ridge

Preliminary Report

Magnitude	5.1
Date-Time	24 Dec 2021 01:41:23 UTC 23 Dec 2021 16:41:23 near epicenter 24 Dec 2021 07:11:23 standard time in your timezone
Location	54.170S 136.646W
Depth	10 km
Distances	3080.4 km (1909.9 mi) E of Waitangi, New Zealand 3790.3 km (2350.0 mi) E of Masterton, New Zealand 3802.4 km (2357.5 mi) E of Dunedin, New Zealand 3804.5 km (2358.8 mi) E of Gisborne, New Zealand 3807.0 km (2360.4 mi) E of Hastings, New Zealand
Location Uncertainty	Horizontal: 12.5 km; Vertical 1.9 km
Parameters	Nph = 34; Dmin = 3528.4 km; Rmss = 0.60 seconds; Gp = 106° Version =
Event ID	us 6000geys

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2021-12-23 22:39:06 (M5.2) Nicobar Islands, India region 7.1 92.6 (70fa9)

M5.2 Earthquake - Nicobar Islands, India region

Preliminary Report

Magnitude	5.2
Date-Time	23 Dec 2021 22:39:07 UTC 24 Dec 2021 04:09:07 near epicenter 24 Dec 2021 04:09:07 standard time in your timezone
Location	7.089N 92.558E
Depth	10 km
Distances	332.7 km (206.3 mi) WNW of Sabang, Indonesia 351.5 km (218.0 mi) WNW of Banda Aceh, Indonesia 421.1 km (261.1 mi) WNW of Sigli, Indonesia 461.4 km (286.1 mi) WNW of Reuleuet, Indonesia 503.7 km (312.3 mi) WNW of Bireun, Indonesia
Location Uncertainty	Horizontal: 7.9 km; Vertical 1.9 km
Parameters	Nph = 107; Dmin = 527.0 km; Rmss = 0.76 seconds; Gp = 82° Version =
Event ID	us 6000gexl

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2021-12-22 23:22:58 (M6.0) off the coast of Jalisco, Mexico 18.9 -107.2 (70fa9)

M6.0 Earthquake - off the coast of Jalisco, Mexico

Preliminary Report

Magnitude	6.0
Date-Time	22 Dec 2021 23:22:59 UTC 22 Dec 2021 16:22:59 near epicenter 23 Dec 2021 04:52:59 standard time in your timezone
Location	18.899N 107.169W
Depth	8 km
Distances	217.9 km (135.1 mi) SW of La Cruz de Loreto, Mexico 276.6 km (171.5 mi) W of Cihuatl�n, Mexico 278.4 km (172.6 mi) SW of Puerto Vallarta, Mexico 281.5 km (174.5 mi) SW of Bucer�as, Mexico 364.4 km (225.9 mi) W of Colima, Mexico
Location Uncertainty	Horizontal: 8.4 km; Vertical 4.3 km
Parameters	Nph = 98; Dmin = 629.5 km; Rmss = 1.45 seconds; Gp = 181° Version =
Event ID	us 6000gepm

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2021-12-22 13:49:52 (M5.1) South Sandwich Islands region -57.8 -25.5 (70fa9)

M5.1 Earthquake - South Sandwich Islands region

Preliminary Report

Magnitude	5.1
Date-Time	22 Dec 2021 13:49:53 UTC 22 Dec 2021 11:49:53 near epicenter 22 Dec 2021 19:19:53 standard time in your timezone
Location	57.782S 25.454W
Depth	35 km
Distances	2497.1 km (1548.2 mi) SSW of Edinburgh of the Seven Seas, Saint Helena 2629.0 km (1630.0 mi) ENE of Ushuaia, Argentina 2643.1 km (1638.7 mi) E of R�o Grande, Argentina 2849.2 km (1766.5 mi) E of R�o Gallegos, Argentina 2864.1 km (1775.7 mi) E of Punta Arenas, Chile
Location Uncertainty	Horizontal: 6.0 km; Vertical 1.9 km
Parameters	Nph = 88; Dmin = 1818.8 km; Rmss = 0.79 seconds; Gp = 83° Version =
Event ID	us 6000geiv

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2021-12-22 12:27:37 (M5.0) Molucca Sea 2.4 126.9 (70fa9)

M5.0 Earthquake - Molucca Sea

Preliminary Report

Magnitude	5.0
Date-Time	22 Dec 2021 12:27:37 UTC 22 Dec 2021 21:27:37 near epicenter 22 Dec 2021 17:57:37 standard time in your timezone
Location	2.403N 126.929E
Depth	10 km
Distances	141.4 km (87.7 mi) WNW of Tobelo, Indonesia 185.3 km (114.9 mi) NNW of Ternate, Indonesia 197.0 km (122.2 mi) NNW of Sofifi, Indonesia 252.8 km (156.8 mi) ENE of Manado, Indonesia 255.1 km (158.2 mi) ENE of Tondano, Indonesia
Location Uncertainty	Horizontal: 7.8 km; Vertical 1.8 km
Parameters	Nph = 88; Dmin = 186.6 km; Rmss = 0.82 seconds; Gp = 45° Version =
Event ID	us 6000gehc

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2021-12-22 09:19:55 (M5.4) New Britain region, Papua New Guinea -4.6 152.6 (70fa9)

M5.4 Earthquake - New Britain region, Papua New Guinea

Preliminary Report

Magnitude	5.4
Date-Time	22 Dec 2021 09:19:55 UTC 22 Dec 2021 20:19:55 near epicenter 22 Dec 2021 14:49:55 standard time in your timezone
Location	4.636S 152.635E
Depth	54 km
Distances	52.0 km (32.2 mi) SE of Kokopo, Papua New Guinea 294.8 km (182.8 mi) ENE of Kimbe, Papua New Guinea 306.3 km (189.9 mi) SE of Kavieng, Papua New Guinea 369.5 km (229.1 mi) WNW of Arawa, Papua New Guinea 665.9 km (412.9 mi) ENE of Lae, Papua New Guinea
Location Uncertainty	Horizontal: 7.8 km; Vertical 6.3 km
Parameters	Nph = 69; Dmin = 71.7 km; Rmss = 0.96 seconds; Gp = 56° Version =
Event ID	us 6000geg0

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2021-12-22 05:51:51 (M5.9) South Sandwich Islands region -57.8 -25.3 (70fa9)

M5.9 Earthquake - South Sandwich Islands region

Preliminary Report

Magnitude	5.9
Date-Time	22 Dec 2021 05:51:51 UTC 22 Dec 2021 03:51:51 near epicenter 22 Dec 2021 11:21:51 standard time in your timezone
Location	57.780S 25.264W
Depth	35 km
Distances	2491.6 km (1544.8 mi) SSW of Edinburgh of the Seven Seas, Saint Helena 2640.2 km (1636.9 mi) ENE of Ushuaia, Argentina 2654.4 km (1645.7 mi) E of R�o Grande, Argentina 2860.5 km (1773.5 mi) E of R�o Gallegos, Argentina 2875.3 km (1782.7 mi) E of Punta Arenas, Chile
Location Uncertainty	Horizontal: 9.8 km; Vertical 1.8 km
Parameters	Nph = 82; Dmin = 800.3 km; Rmss = 1.00 seconds; Gp = 38° Version =
Event ID	us 6000geea

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2021-12-21 22:42:14 UPDATED: (M6.0) Southern Alaska 60.2 -153.3 (70fa9)

M6.0 Earthquake - Southern Alaska

Preliminary Report

Magnitude	6.0
Date-Time	21 Dec 2021 22:42:15 UTC 21 Dec 2021 13:42:15 near epicenter 22 Dec 2021 04:12:15 standard time in your timezone
Location	60.160N 153.317W
Depth	114 km
Distances	55.6 km (34.5 mi) E of Port Alsworth, Alaska 220.8 km (136.9 mi) SW of Anchorage, Alaska 242.0 km (150.0 mi) SW of Eagle River, Alaska 252.1 km (156.3 mi) SW of Knik-Fairview, Alaska 1004.3 km (622.6 mi) WSW of Whitehorse, Canada
Location Uncertainty	Horizontal: 0.0 km; Vertical 0.2 km
Parameters	Nph = 158; Dmin = 0.0 km; Rmss = 0.81 seconds; Gp = 0° Version = 1
Event ID	ak 021gbh4rso ***This event has been revised.

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Alaska Earthquake Center
Geophysical Institute, University of Alaska Fairbanks

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2021-12-21 22:42:14 UPDATED: (M5.0) Southern Alaska 60.2 -153.3 (70fa9)

M5.0 Earthquake - Southern Alaska

Preliminary Report

Magnitude	5.0
Date-Time	21 Dec 2021 22:42:15 UTC 21 Dec 2021 13:42:15 near epicenter 22 Dec 2021 04:12:15 standard time in your timezone
Location	60.165N 153.311W
Depth	115 km
Distances	55.9 km (34.7 mi) E of Port Alsworth, Alaska 220.2 km (136.5 mi) WSW of Anchorage, Alaska 241.4 km (149.7 mi) SW of Eagle River, Alaska 251.5 km (155.9 mi) SW of Knik-Fairview, Alaska 1003.8 km (622.4 mi) WSW of Whitehorse, Canada
Location Uncertainty	Horizontal: 0.0 km; Vertical 0.2 km
Parameters	Nph = 137; Dmin = 0.0 km; Rmss = 0.83 seconds; Gp = 0° Version = 1
Event ID	ak 021gbh4rso ***This event has been revised.

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Geophysical Institute, University of Alaska Fairbanks

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2021-12-21 22:42:14 UPDATED: (M5.9) Southern Alaska 60.2 -153.3 (70fa9)

M5.9 Earthquake - Southern Alaska

Preliminary Report

Magnitude	5.9
Date-Time	21 Dec 2021 22:42:14 UTC 21 Dec 2021 13:42:14 near epicenter 22 Dec 2021 04:12:14 standard time in your timezone
Location	60.157N 153.286W
Depth	133 km
Distances	57.4 km (35.6 mi) E of Port Alsworth, Alaska 219.5 km (136.1 mi) SW of Anchorage, Alaska 240.7 km (149.2 mi) SW of Eagle River, Alaska 250.9 km (155.6 mi) SW of Knik-Fairview, Alaska 1002.6 km (621.6 mi) WSW of Whitehorse, Canada
Location Uncertainty	Horizontal: 0.0 km; Vertical 0.4 km
Parameters	Nph = 109; Dmin = 0.0 km; Rmss = 0.74 seconds; Gp = 0° Version = 1
Event ID	ak 021gbh4rso

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Geophysical Institute, University of Alaska Fairbanks

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2021-12-21 16:46:59 (M5.0) Izu Islands, Japan region 31.1 142.3 (70fa9)

M5.0 Earthquake - Izu Islands, Japan region

Preliminary Report

Magnitude	5.0
Date-Time	21 Dec 2021 16:46:59 UTC 22 Dec 2021 01:46:59 near epicenter 21 Dec 2021 22:16:59 standard time in your timezone
Location	31.103N 142.333E
Depth	10 km
Distances	486.3 km (301.5 mi) SSE of Katsuura, Japan 488.0 km (302.6 mi) SSE of Tateyama, Japan 489.4 km (303.5 mi) SSE of Kamogawa, Japan 493.9 km (306.2 mi) SSE of ?hara, Japan 539.7 km (334.6 mi) SSE of Chiba, Japan
Location Uncertainty	Horizontal: 6.5 km; Vertical 1.8 km
Parameters	Nph = 48; Dmin = 325.9 km; Rmss = 0.44 seconds; Gp = 98° Version =
Event ID	us 6000ge6n

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2021-12-21 04:24:35 (M5.0) South Atlantic Ocean -54.3 -40.5 (70fa9)

M5.0 Earthquake - South Atlantic Ocean

Preliminary Report

Magnitude	5.0
Date-Time	21 Dec 2021 04:24:36 UTC 21 Dec 2021 02:24:36 near epicenter 21 Dec 2021 09:54:36 standard time in your timezone
Location	54.268S 40.492W
Depth	10 km
Distances	1724.5 km (1069.2 mi) ENE of Tolhuin, Argentina 1773.4 km (1099.5 mi) E of R�o Grande, Argentina 1790.1 km (1109.9 mi) ENE of Ushuaia, Argentina 1911.4 km (1185.1 mi) ESE of Puerto Deseado, Argentina 1939.5 km (1202.5 mi) E of R�o Gallegos, Argentina
Location Uncertainty	Horizontal: 14.5 km; Vertical 1.9 km
Parameters	Nph = 27; Dmin = 261.0 km; Rmss = 0.83 seconds; Gp = 171° Version =
Event ID	us 6000ge2u

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2021-12-21 01:34:31 (M5.2) Vanuatu -15.9 167.8 (70fa9)

M5.2 Earthquake - Vanuatu

Preliminary Report

Magnitude	5.2
Date-Time	21 Dec 2021 01:34:31 UTC 21 Dec 2021 12:34:31 near epicenter 21 Dec 2021 07:04:31 standard time in your timezone
Location	15.927S 167.799E
Depth	161 km
Distances	45.3 km (28.1 mi) ENE of Lakatoro, Vanuatu 81.8 km (50.7 mi) ESE of Luganville, Vanuatu 207.7 km (128.7 mi) NNW of Port-Vila, Vanuatu 555.2 km (344.2 mi) N of W�, New Caledonia 703.4 km (436.1 mi) NNE of Pa�ta, New Caledonia
Location Uncertainty	Horizontal: 10.0 km; Vertical 6.2 km
Parameters	Nph = 32; Dmin = 83.0 km; Rmss = 0.54 seconds; Gp = 190° Version =
Event ID	us 6000ge1l

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2021-12-20 20:10:18 UPDATED: (M6.2) near the coast of Northern California 40.3 -124.7 (70fa9)

M6.2 Earthquake - near the coast of Northern California

Preliminary Report

Magnitude	6.2
Date-Time	20 Dec 2021 20:10:18 UTC 20 Dec 2021 12:10:18 near epicenter 21 Dec 2021 01:40:18 standard time in your timezone
Location	40.315N 124.739W
Depth	9 km
Distances	49.7 km (30.8 mi) SW of Ferndale, California 58.5 km (36.3 mi) WSW of Fortuna, California 72.8 km (45.2 mi) SW of Eureka, California 81.9 km (50.8 mi) SW of Bayside, California 339.1 km (210.3 mi) WNW of Sacramento, California
Location Uncertainty	Horizontal: 0.6 km; Vertical 0.9 km
Parameters	Nph = 65; Dmin = 0.0 km; Rmss = 0.17 seconds; Gp = 224° Version = 3
Event ID	nc 73666231 ***This event has been revised.

For updates, maps, and technical information
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CISN Northern California Management Center
U.S. Geological Survey
Berkeley Seismological Laboratory
http://www.cisn.org/ncmc.html

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2021-12-20 20:10:18 UPDATED: (M5.8) near the coast of Northern California 40.3 -124.7 (70fa9)

M5.8 Earthquake - near the coast of Northern California

Preliminary Report

Magnitude	5.8
Date-Time	20 Dec 2021 20:10:18 UTC 20 Dec 2021 12:10:18 near epicenter 21 Dec 2021 01:40:18 standard time in your timezone
Location	40.315N 124.739W
Depth	9 km
Distances	49.7 km (30.8 mi) SW of Ferndale, California 58.5 km (36.3 mi) WSW of Fortuna, California 72.8 km (45.2 mi) SW of Eureka, California 81.9 km (50.8 mi) SW of Bayside, California 339.1 km (210.3 mi) WNW of Sacramento, California
Location Uncertainty	Horizontal: 0.6 km; Vertical 0.9 km
Parameters	Nph = 65; Dmin = 0.0 km; Rmss = 0.17 seconds; Gp = 224° Version = 2
Event ID	nc 73666231 ***This event supersedes event EW1640031020.

For updates, maps, and technical information
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Berkeley Seismological Laboratory
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2021-12-20 16:34:27 (M5.1) Tucuman-Santiago del Estero region, Argentina -26.1 -64.7 (70fa9)

M5.1 Earthquake - Tucuman-Santiago del Estero region, Argentina

Preliminary Report

Magnitude	5.1
Date-Time	20 Dec 2021 16:34:27 UTC 20 Dec 2021 14:34:27 near epicenter 20 Dec 2021 22:04:27 standard time in your timezone
Location	26.150S 64.673W
Depth	10 km
Distances	39.3 km (24.4 mi) N of Burruyac�, Argentina 87.0 km (53.9 mi) NNE of Alderetes, Argentina 87.1 km (54.0 mi) NE of Taf� Viejo, Argentina 92.7 km (57.4 mi) NE of San Miguel de Tucum�n, Argentina 97.9 km (60.7 mi) NE of Yerba Buena, Argentina
Location Uncertainty	Horizontal: 2.1 km; Vertical 1.9 km
Parameters	Nph = 49; Dmin = 450.5 km; Rmss = 1.28 seconds; Gp = 62° Version =
Event ID	us 6000gdvs

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2021-12-20 16:05:26 (M5.0) Hokkaido, Japan region 42.4 142.7 (70fa9)

M5.0 Earthquake - Hokkaido, Japan region

Preliminary Report

Magnitude	5.0
Date-Time	20 Dec 2021 16:05:27 UTC 21 Dec 2021 01:05:27 near epicenter 20 Dec 2021 21:35:27 standard time in your timezone
Location	42.390N 142.699E
Depth	48 km
Distances	28.1 km (17.4 mi) ENE of Shizunai-furukawach?, Japan 71.7 km (44.5 mi) SW of Obihiro, Japan 78.4 km (48.6 mi) SSW of Otofuke, Japan 94.1 km (58.4 mi) ESE of Tomakomai, Japan 133.6 km (82.8 mi) SE of Sapporo, Japan
Location Uncertainty	Horizontal: 5.7 km; Vertical 5.6 km
Parameters	Nph = 93; Dmin = 56.3 km; Rmss = 0.95 seconds; Gp = 80° Version =
Event ID	us 6000gdup

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2021-12-20 03:39:34 (M6.0) South Sandwich Islands region -56.9 -24.1 (70fa9)

M6.0 Earthquake - South Sandwich Islands region

Preliminary Report

Magnitude	6.0
Date-Time	20 Dec 2021 03:39:34 UTC 20 Dec 2021 01:39:34 near epicenter 20 Dec 2021 09:09:34 standard time in your timezone
Location	56.853S 24.092W
Depth	10 km
Distances	2367.4 km (1467.8 mi) SSW of Edinburgh of the Seven Seas, Saint Helena 2731.8 km (1693.7 mi) ENE of Ushuaia, Argentina 2742.0 km (1700.1 mi) ENE of R�o Grande, Argentina 2942.6 km (1824.4 mi) E of R�o Gallegos, Argentina 2964.0 km (1837.7 mi) ENE of Punta Arenas, Chile
Location Uncertainty	Horizontal: 5.6 km; Vertical 1.8 km
Parameters	Nph = 86; Dmin = 832.2 km; Rmss = 0.79 seconds; Gp = 33° Version =
Event ID	us 6000gdqc

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2021-12-20 01:36:25 (M5.3) eastern New Guinea region, Papua New Guinea -5.4 146.8 (70fa9)

M5.3 Earthquake - eastern New Guinea region, Papua New Guinea

Preliminary Report

Magnitude	5.3
Date-Time	20 Dec 2021 01:36:25 UTC 20 Dec 2021 12:36:25 near epicenter 20 Dec 2021 07:06:25 standard time in your timezone
Location	5.366S 146.843E
Depth	231 km
Distances	118.1 km (73.2 mi) E of Madang, Papua New Guinea 151.1 km (93.7 mi) N of Lae, Papua New Guinea 179.8 km (111.5 mi) ENE of Goroka, Papua New Guinea 204.5 km (126.8 mi) N of Bulolo, Papua New Guinea 218.5 km (135.5 mi) N of Wau, Papua New Guinea
Location Uncertainty	Horizontal: 8.2 km; Vertical 8.7 km
Parameters	Nph = 46; Dmin = 603.7 km; Rmss = 0.72 seconds; Gp = 49° Version =
Event ID	us 6000gdpm

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2021-12-19 21:06:14 (M5.6) Laos 19.6 101.3 (70fa9)

M5.6 Earthquake - Laos

Preliminary Report

Magnitude	5.6
Date-Time	19 Dec 2021 21:06:15 UTC 20 Dec 2021 04:06:15 near epicenter 20 Dec 2021 02:36:15 standard time in your timezone
Location	19.555N 101.326E
Depth	10 km
Distances	52.1 km (32.3 mi) NW of Sainyabuli, Laos 56.7 km (35.1 mi) ENE of Chiang Klang, Thailand 92.4 km (57.3 mi) WSW of Luang Prabang, Laos 102.9 km (63.8 mi) NE of Nan, Thailand 107.7 km (66.8 mi) E of Chiang Kham, Thailand
Location Uncertainty	Horizontal: 4.9 km; Vertical 1.8 km
Parameters	Nph = 90; Dmin = 124.4 km; Rmss = 1.15 seconds; Gp = 39° Version =
Event ID	us 6000gdng

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2021-12-19 16:28:22 (M6.3) Fiji -16.3 178.6 (70fa9)

M6.3 Earthquake - Fiji

Preliminary Report

Magnitude	6.3
Date-Time	19 Dec 2021 16:28:23 UTC 20 Dec 2021 05:28:23 near epicenter 19 Dec 2021 21:58:23 standard time in your timezone
Location	16.279S 178.552E
Depth	10 km
Distances	88.5 km (54.9 mi) W of Labasa, Fiji 167.4 km (103.8 mi) NE of Ba, Fiji 188.9 km (117.1 mi) NE of Lautoka, Fiji 206.4 km (128.0 mi) N of Suva, Fiji 207.5 km (128.6 mi) NE of Nadi, Fiji
Location Uncertainty	Horizontal: 8.4 km; Vertical 1.9 km
Parameters	Nph = 64; Dmin = 170.5 km; Rmss = 0.61 seconds; Gp = 43° Version =
Event ID	us 6000gdma

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2021-12-19 03:19:45 (M5.3) Andaman Islands, India region 13.7 92.8 (70fa9)

M5.3 Earthquake - Andaman Islands, India region

Preliminary Report

Magnitude	5.3
Date-Time	19 Dec 2021 03:19:46 UTC 19 Dec 2021 08:49:46 near epicenter 19 Dec 2021 08:49:46 standard time in your timezone
Location	13.670N 92.760E
Depth	10 km
Distances	218.0 km (135.2 mi) N of Bamboo Flat, India 221.7 km (137.5 mi) N of Port Blair, India 402.8 km (249.7 mi) SW of Mawlamyinegyunn, Myanmar 404.0 km (250.5 mi) SSW of Pathein, Myanmar 405.9 km (251.7 mi) SW of Bogale, Myanmar
Location Uncertainty	Horizontal: 7.8 km; Vertical 1.8 km
Parameters	Nph = 97; Dmin = 691.1 km; Rmss = 0.88 seconds; Gp = 82° Version =
Event ID	us 6000gdim

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2021-12-18 23:54:27 (M5.5) northern Qinghai, China 38.9 92.6 (70fa9)

M5.5 Earthquake - northern Qinghai, China

Preliminary Report

Magnitude	5.5
Date-Time	18 Dec 2021 23:54:27 UTC 19 Dec 2021 07:54:27 near epicenter 19 Dec 2021 05:24:27 standard time in your timezone
Location	38.926N 92.615E
Depth	10 km
Distances	440.4 km (273.1 mi) S of Hami, China 452.3 km (280.4 mi) WSW of Laojunmiao, China 498.4 km (309.0 mi) WSW of Jiayuguan, China 516.8 km (320.4 mi) WSW of Jiuquan, China 684.7 km (424.5 mi) SE of �r�mqi, China
Location Uncertainty	Horizontal: 7.5 km; Vertical 1.8 km
Parameters	Nph = 137; Dmin = 1204.7 km; Rmss = 0.63 seconds; Gp = 36° Version =
Event ID	us 6000gdhy

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2021-12-18 20:14:16 (M5.1) southeast of the Loyalty Islands -21.4 170.2 (70fa9)

M5.1 Earthquake - southeast of the Loyalty Islands

Preliminary Report

Magnitude	5.1
Date-Time	18 Dec 2021 20:14:16 UTC 19 Dec 2021 07:14:16 near epicenter 19 Dec 2021 01:44:16 standard time in your timezone
Location	21.412S 170.151E
Depth	10 km
Distances	226.1 km (140.2 mi) SSE of Isangel, Vanuatu 304.7 km (188.9 mi) E of W�, New Caledonia 382.3 km (237.1 mi) ENE of Mont-Dore, New Caledonia 390.8 km (242.3 mi) ENE of Dumb�a, New Caledonia 394.4 km (244.5 mi) ENE of Noum�a, New Caledonia
Location Uncertainty	Horizontal: 8.0 km; Vertical 1.9 km
Parameters	Nph = 48; Dmin = 309.0 km; Rmss = 0.76 seconds; Gp = 88° Version =
Event ID	us 6000gdgp

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2021-12-18 20:05:44 (M6.0) Prince Edward Islands region -47.1 33.5 (70fa9)

M6.0 Earthquake - Prince Edward Islands region

Preliminary Report

Magnitude	6.0
Date-Time	18 Dec 2021 20:05:44 UTC 18 Dec 2021 22:05:44 near epicenter 19 Dec 2021 01:35:44 standard time in your timezone
Location	47.100S 33.455E
Depth	10 km
Distances	1599.7 km (991.8 mi) SSE of Port Alfred, South Africa 1601.1 km (992.7 mi) SSE of Port Elizabeth, South Africa 1628.8 km (1009.9 mi) SSE of Kruisfontein, South Africa 1629.6 km (1010.3 mi) SSE of Uitenhage, South Africa 1662.5 km (1030.8 mi) SSE of Bhisho, South Africa
Location Uncertainty	Horizontal: 10.1 km; Vertical 1.9 km
Parameters	Nph = 71; Dmin = 1405.8 km; Rmss = 0.66 seconds; Gp = 49° Version =
Event ID	us 6000gdgn

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