2025-12-20 12:58:54 (M5.2) Hokkaido, Japan region 42.7 146.0 (70fa9)

M5.2 Earthquake - Hokkaido, Japan region

Preliminary Report

Magnitude	5.2
Date-Time	Universal Time (UTC): 20 Dec 2025 12:58:55 Time near the Epicenter (1): 20 Dec 2025 23:58:55 Time in your area (1): 20 Dec 2025 18:28:55
Location	42.724N 145.981E
Depth	42 km
Distances	74.4 km (46.1 mi) SSE of Nemuro, Japan 123.0 km (76.3 mi) SE of Nakashibetsu, Japan 124.7 km (77.3 mi) SSE of Shibetsu, Japan 134.2 km (83.2 mi) ESE of Kushiro, Japan 380.1 km (235.7 mi) E of Sapporo, Japan
Location Uncertainty	Horizontal: 9.8 km; Vertical 7.7 km
Parameters	Nph = 53; Dmin = 245.6 km; Rmss = 0.71 seconds; Gp = 135° Version =
Event ID	us 6000rw6s

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2025-12-20 12:30:32 (M5.3) Hokkaido, Japan region 42.7 146.0 (70fa9)

M5.3 Earthquake - Hokkaido, Japan region

Preliminary Report

Magnitude	5.3
Date-Time	Universal Time (UTC): 20 Dec 2025 12:30:32 Time near the Epicenter (1): 20 Dec 2025 23:30:32 Time in your area (1): 20 Dec 2025 18:00:32
Location	42.730N 145.985E
Depth	39 km
Distances	74.0 km (45.9 mi) SSE of Nemuro, Japan 122.8 km (76.1 mi) SE of Nakashibetsu, Japan 124.4 km (77.1 mi) SSE of Shibetsu, Japan 134.4 km (83.3 mi) ESE of Kushiro, Japan 380.4 km (235.8 mi) E of Sapporo, Japan
Location Uncertainty	Horizontal: 8.6 km; Vertical 6.4 km
Parameters	Nph = 79; Dmin = 246.2 km; Rmss = 0.59 seconds; Gp = 97° Version =
Event ID	us 6000rw6m

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2025-12-20 10:33:26 (M5.0) Minahasa, Sulawesi, Indonesia 0.5 121.9 (70fa9)

M5.0 Earthquake - Minahasa, Sulawesi, Indonesia

Preliminary Report

Magnitude	5.0
Date-Time	Universal Time (UTC): 20 Dec 2025 10:33:26 Time near the Epicenter (1): 20 Dec 2025 18:33:26 Time in your area (1): 20 Dec 2025 16:03:26
Location	0.495N 121.889E
Depth	124 km
Distances	130.7 km (81.0 mi) W of Gorontalo, Indonesia 188.6 km (116.9 mi) NNW of Luwuk, Indonesia 244.4 km (151.5 mi) NNE of Poso, Indonesia 273.0 km (169.3 mi) NE of Palu, Indonesia 283.6 km (175.8 mi) W of Modisi, Indonesia
Location Uncertainty	Horizontal: 7.8 km; Vertical 7.3 km
Parameters	Nph = 54; Dmin = 351.4 km; Rmss = 0.75 seconds; Gp = 63° Version =
Event ID	us 6000rw6b

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2025-12-20 10:25:04 (M5.3) Balleny Islands region -63.7 172.4 (70fa9)

M5.3 Earthquake - Balleny Islands region

Preliminary Report

Magnitude	5.3
Date-Time	Universal Time (UTC): 20 Dec 2025 10:25:04 Time near the Epicenter (1): 20 Dec 2025 21:25:04 Time in your area (1): 20 Dec 2025 15:55:04
Location	63.692S 172.383E
Depth	10 km
Distances	1915.6 km (1187.7 mi) S of Papatowai, New Zealand 1941.2 km (1203.5 mi) S of Invercargill, New Zealand 1969.7 km (1221.2 mi) S of Gore, New Zealand 1986.8 km (1231.8 mi) S of Dunedin, New Zealand 2071.6 km (1284.4 mi) S of Oamaru, New Zealand
Location Uncertainty	Horizontal: 12.9 km; Vertical 1.9 km
Parameters	Nph = 26; Dmin = 1588.1 km; Rmss = 0.78 seconds; Gp = 114° Version =
Event ID	us 6000rw6a

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2025-12-20 06:57:09 (M5.6) Balleny Islands region -63.9 172.7 (70fa9)

M5.6 Earthquake - Balleny Islands region

Preliminary Report

Magnitude	5.6
Date-Time	Universal Time (UTC): 20 Dec 2025 06:57:10 Time near the Epicenter (1): 20 Dec 2025 19:57:10 Time in your area (1): 20 Dec 2025 12:27:10
Location	63.894S 172.707E
Depth	10 km
Distances	1940.0 km (1202.8 mi) S of Papatowai, New Zealand 1966.1 km (1219.0 mi) S of Invercargill, New Zealand 1994.3 km (1236.5 mi) S of Gore, New Zealand 2010.7 km (1246.6 mi) S of Dunedin, New Zealand 2095.1 km (1299.0 mi) S of Oamaru, New Zealand
Location Uncertainty	Horizontal: 11.7 km; Vertical 1.9 km
Parameters	Nph = 27; Dmin = 1305.3 km; Rmss = 0.97 seconds; Gp = 119° Version =
Event ID	us 6000rw5u

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2025-12-19 21:59:54 (M5.1) Ecuador -0.7 -78.0 (70fa9)

M5.1 Earthquake - Ecuador

Preliminary Report

Magnitude	5.1
Date-Time	Universal Time (UTC): 19 Dec 2025 21:59:54 Time near the Epicenter (1): 19 Dec 2025 16:59:54 Time in your area (1): 20 Dec 2025 03:29:54
Location	0.685S 77.989W
Depth	10 km
Distances	32.0 km (19.8 mi) NW of Archidona, Ecuador 39.3 km (24.4 mi) NNW of Tena, Ecuador 67.2 km (41.7 mi) ESE of Machachi, Ecuador 75.1 km (46.5 mi) ENE of Latacunga, Ecuador 78.0 km (48.3 mi) ENE of San Miguel de Salcedo, Ecuador
Location Uncertainty	Horizontal: 5.3 km; Vertical 1.9 km
Parameters	Nph = 56; Dmin = 46.5 km; Rmss = 1.67 seconds; Gp = 52° Version =
Event ID	us 6000rw3h

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2025-12-18 14:42:38 (M5.0) Kuril Islands 43.4 148.0 (70fa9)

M5.0 Earthquake - Kuril Islands

Preliminary Report

Magnitude	5.0
Date-Time	Universal Time (UTC): 18 Dec 2025 14:42:39 Time near the Epicenter (1): 19 Dec 2025 01:42:39 Time in your area (1): 18 Dec 2025 20:12:39
Location	43.431N 147.963E
Depth	40 km
Distances	108.2 km (67.1 mi) ESE of Shikotan, Russia 193.9 km (120.2 mi) E of Nemuro, Japan 230.2 km (142.7 mi) E of Shibetsu, Japan 242.3 km (150.2 mi) E of Nakashibetsu, Japan 538.4 km (333.8 mi) E of Sapporo, Japan
Location Uncertainty	Horizontal: 11.6 km; Vertical 9.3 km
Parameters	Nph = 45; Dmin = 424.0 km; Rmss = 0.90 seconds; Gp = 196° Version =
Event ID	us 6000rvpe

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2025-12-19 05:39:10 (M5.3) Hindu Kush region, Afghanistan 36.3 69.2 (70fa9)

M5.3 Earthquake - Hindu Kush region, Afghanistan

Preliminary Report

Magnitude	5.3
Date-Time	Universal Time (UTC): 19 Dec 2025 05:39:10 Time near the Epicenter (1): 19 Dec 2025 10:09:10 Time in your area (1): 19 Dec 2025 11:09:10
Location	36.283N 69.205E
Depth	35 km
Distances	25.1 km (15.6 mi) NNE of Nahrīn, Afghanistan 45.1 km (28.0 mi) S of Khanabad, Afghanistan 47.8 km (29.6 mi) ENE of Baghlān, Afghanistan 58.0 km (35.9 mi) NE of Pul-e Khumrī, Afghanistan 58.3 km (36.1 mi) SSW of Taloqan, Afghanistan
Location Uncertainty	Horizontal: 7.8 km; Vertical 1.9 km
Parameters	Nph = 114; Dmin = 263.4 km; Rmss = 0.95 seconds; Gp = 43° Version =
Event ID	us 6000rvxc

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2025-12-19 05:00:19 (M5.7) Fiji region -15.6 -179.7 (70fa9)

M5.7 Earthquake - Fiji region

Preliminary Report

Magnitude	5.7
Date-Time	Universal Time (UTC): 19 Dec 2025 05:00:19 Time near the Epicenter (1): 19 Dec 2025 18:00:19 Time in your area (1): 19 Dec 2025 10:30:19
Location	15.602S 179.691W
Depth	10 km
Distances	136.7 km (84.7 mi) NE of Labasa, Fiji 333.6 km (206.8 mi) NE of Nasinu, Fiji 344.9 km (213.9 mi) NE of Suva, Fiji 353.3 km (219.0 mi) NE of Ba, Fiji 377.8 km (234.2 mi) NE of Lautoka, Fiji
Location Uncertainty	Horizontal: 11.1 km; Vertical 1.9 km
Parameters	Nph = 37; Dmin = 139.4 km; Rmss = 1.27 seconds; Gp = 130° Version =
Event ID	us 6000rvx4

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2025-12-19 04:02:39 (M5.1) Mindanao, Philippines 8.6 126.8 (70fa9)

M5.1 Earthquake - Mindanao, Philippines

Preliminary Report

Magnitude	5.1
Date-Time	Universal Time (UTC): 19 Dec 2025 04:02:39 Time near the Epicenter (1): 19 Dec 2025 12:02:39 Time in your area (1): 19 Dec 2025 09:32:39
Location	8.617N 126.775E
Depth	65 km
Distances	55.5 km (34.4 mi) ENE of Hinatuan, Philippines 67.2 km (41.7 mi) NE of Bislig, Philippines 68.9 km (42.7 mi) ENE of Tagbina, Philippines 74.9 km (46.4 mi) E of Lianga, Philippines 140.4 km (87.0 mi) ESE of Butuan, Philippines
Location Uncertainty	Horizontal: 9.8 km; Vertical 7.3 km
Parameters	Nph = 47; Dmin = 215.8 km; Rmss = 0.72 seconds; Gp = 98° Version =
Event ID	us 6000rvwy

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2025-12-18 11:32:50 (M5.0) Taiwan 24.1 121.8 (70fa9)

M5.0 Earthquake - Taiwan

Preliminary Report

Magnitude	5.0
Date-Time	Universal Time (UTC): 18 Dec 2025 11:32:50 Time near the Epicenter (1): 18 Dec 2025 19:32:50 Time in your area (1): 18 Dec 2025 17:02:50
Location	24.067N 121.768E
Depth	32 km
Distances	19.4 km (12.0 mi) ENE of Hualien City, Taiwan 76.4 km (47.4 mi) S of Yilan, Taiwan 82.0 km (50.8 mi) E of Puli, Taiwan 102.6 km (63.6 mi) SSE of Daxi, Taiwan 110.8 km (68.7 mi) E of Zhongxing New Village, Taiwan
Location Uncertainty	Horizontal: 3.5 km; Vertical 5.2 km
Parameters	Nph = 45; Dmin = 21.1 km; Rmss = 0.98 seconds; Gp = 67° Version =
Event ID	us 6000rvnk

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2025-12-18 07:27:47 (M5.5) Babuyan Islands region, Philippines 19.9 121.2 (70fa9)

M5.5 Earthquake - Babuyan Islands region, Philippines

Preliminary Report

Magnitude	5.5
Date-Time	Universal Time (UTC): 18 Dec 2025 07:27:47 Time near the Epicenter (1): 18 Dec 2025 15:27:47 Time in your area (1): 18 Dec 2025 12:57:47
Location	19.907N 121.243E
Depth	40 km
Distances	96.9 km (60.1 mi) SW of Basco, Philippines 144.8 km (89.8 mi) N of Claveria, Philippines 176.6 km (109.5 mi) NNW of Aparri, Philippines 201.0 km (124.6 mi) NNW of Magapit, Philippines 258.6 km (160.3 mi) NNW of Tuguegarao, Philippines
Location Uncertainty	Horizontal: 11.6 km; Vertical 9.5 km
Parameters	Nph = 32; Dmin = 322.5 km; Rmss = 0.78 seconds; Gp = 106° Version =
Event ID	us 6000rvmn

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2025-12-18 05:30:18 (M5.0) Molucca Sea 1.4 125.8 (70fa9)

M5.0 Earthquake - Molucca Sea

Preliminary Report

Magnitude	5.0
Date-Time	Universal Time (UTC): 18 Dec 2025 05:30:18 Time near the Epicenter (1): 18 Dec 2025 13:30:18 Time in your area (1): 18 Dec 2025 11:00:18
Location	1.402N 125.783E
Depth	76 km
Distances	73.0 km (45.3 mi) E of Bitung, Indonesia 97.5 km (60.4 mi) E of Tondano, Indonesia 104.3 km (64.7 mi) E of Manado, Indonesia 109.4 km (67.8 mi) E of Tomohon, Indonesia 183.1 km (113.5 mi) NE of Modisi, Indonesia
Location Uncertainty	Horizontal: 4.9 km; Vertical 7.3 km
Parameters	Nph = 58; Dmin = 369.4 km; Rmss = 1.16 seconds; Gp = 85° Version =
Event ID	us 6000rvmc

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2025-12-18 01:59:31 (M5.2) Vanuatu -20.3 169.3 (70fa9)

M5.2 Earthquake - Vanuatu

Preliminary Report

Magnitude	5.2
Date-Time	Universal Time (UTC): 18 Dec 2025 01:59:31 Time near the Epicenter (1): 18 Dec 2025 12:59:31 Time in your area (1): 18 Dec 2025 07:29:31
Location	20.273S 169.344E
Depth	51 km
Distances	81.2 km (50.4 mi) S of Isangel, Vanuatu 228.2 km (141.5 mi) ENE of Wé, New Caledonia 301.0 km (186.6 mi) SSE of Port-Vila, Vanuatu 362.8 km (224.9 mi) NE of Mont-Dore, New Caledonia 365.2 km (226.4 mi) NE of Dumbéa, New Caledonia
Location Uncertainty	Horizontal: 3.7 km; Vertical 6.8 km
Parameters	Nph = 62; Dmin = 325.0 km; Rmss = 0.83 seconds; Gp = 63° Version =
Event ID	us 6000rvl8

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2025-12-17 23:07:46 (M5.6) south of Panama 6.7 -82.5 (70fa9)

M5.6 Earthquake - south of Panama

Preliminary Report

Magnitude	5.6
Date-Time	Universal Time (UTC): 17 Dec 2025 23:07:47 Time near the Epicenter (1): 17 Dec 2025 17:07:47 Time in your area (1): 18 Dec 2025 04:37:47
Location	6.699N 82.541W
Depth	10 km
Distances	152.0 km (94.2 mi) SSE of Burica, Panama 178.1 km (110.4 mi) SSE of Puerto Armuelles, Panama 186.0 km (115.3 mi) S of Pedregal, Panama 191.5 km (118.7 mi) S of David, Panama 192.0 km (119.1 mi) S of Las Lomas, Panama
Location Uncertainty	Horizontal: 8.4 km; Vertical 5.8 km
Parameters	Nph = 58; Dmin = 372.7 km; Rmss = 1.04 seconds; Gp = 145° Version =
Event ID	us 6000rvkl

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2025-12-17 22:30:07 (M5.0) Vanuatu -18.5 168.6 (70fa9)

M5.0 Earthquake - Vanuatu

Preliminary Report

Magnitude	5.0
Date-Time	Universal Time (UTC): 17 Dec 2025 22:30:07 Time near the Epicenter (1): 18 Dec 2025 09:30:07 Time in your area (1): 18 Dec 2025 04:00:07
Location	18.460S 168.571E
Depth	95 km
Distances	84.6 km (52.4 mi) SSE of Port-Vila, Vanuatu 141.2 km (87.5 mi) NNW of Isangel, Vanuatu 304.6 km (188.8 mi) NNE of Wé, New Caledonia 358.3 km (222.1 mi) SSE of Luganville, Vanuatu 465.1 km (288.4 mi) NNE of Dumbéa, New Caledonia
Location Uncertainty	Horizontal: 8.0 km; Vertical 8.2 km
Parameters	Nph = 34; Dmin = 363.5 km; Rmss = 0.46 seconds; Gp = 82° Version =
Event ID	us 6000rvkd

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2025-12-17 17:23:28 (M5.4) Fiji region -16.6 -177.3 (70fa9)

M5.4 Earthquake - Fiji region

Preliminary Report

Magnitude	5.4
Date-Time	Universal Time (UTC): 17 Dec 2025 17:23:28 Time near the Epicenter (1): 18 Dec 2025 06:23:28 Time in your area (1): 17 Dec 2025 22:53:28
Location	16.646S 177.301W
Depth	401 km
Distances	272.6 km (169.0 mi) SSE of Alo, Wallis and Futuna 356.7 km (221.1 mi) E of Labasa, Fiji 471.9 km (292.6 mi) ENE of Nasinu, Fiji 483.1 km (299.5 mi) ENE of Suva, Fiji 543.7 km (337.1 mi) E of Ba, Fiji
Location Uncertainty	Horizontal: 9.9 km; Vertical 6.7 km
Parameters	Nph = 74; Dmin = 355.4 km; Rmss = 0.90 seconds; Gp = 27° Version =
Event ID	us 6000rvhm

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2025-12-17 17:05:57 (M5.7) South Sandwich Islands region -58.7 -25.2 (70fa9)

M5.7 Earthquake - South Sandwich Islands region

Preliminary Report

Magnitude	5.7
Date-Time	Universal Time (UTC): 17 Dec 2025 17:05:57 Time near the Epicenter (1): 17 Dec 2025 15:05:57 Time in your area (1): 17 Dec 2025 22:35:57
Location	58.675S 25.247W
Depth	35 km
Distances	2574.1 km (1595.9 mi) E of Tolhuin, Argentina 2579.5 km (1599.3 mi) SSW of Edinburgh of the Seven Seas, Saint Helena 2623.0 km (1626.3 mi) E of Ushuaia, Argentina 2641.8 km (1637.9 mi) E of Río Grande, Argentina 2853.8 km (1769.4 mi) E of Río Gallegos, Argentina
Location Uncertainty	Horizontal: 10.4 km; Vertical 1.9 km
Parameters	Nph = 60; Dmin = 847.1 km; Rmss = 0.48 seconds; Gp = 82° Version =
Event ID	us 6000rvhe

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2025-12-17 01:44:10 (M5.2) east of the Kuril Islands 43.5 148.2 (70fa9)

M5.2 Earthquake - east of the Kuril Islands

Preliminary Report

Magnitude	5.2
Date-Time	Universal Time (UTC): 17 Dec 2025 01:44:11 Time near the Epicenter (1): 17 Dec 2025 12:44:11 Time in your area (1): 17 Dec 2025 07:14:11
Location	43.452N 148.174E
Depth	10 km
Distances	123.4 km (76.5 mi) ESE of Shikotan, Russia 211.0 km (130.8 mi) E of Nemuro, Japan 246.8 km (153.0 mi) E of Shibetsu, Japan 259.2 km (160.7 mi) E of Nakashibetsu, Japan 555.6 km (344.4 mi) E of Sapporo, Japan
Location Uncertainty	Horizontal: 9.6 km; Vertical 1.9 km
Parameters	Nph = 64; Dmin = 440.9 km; Rmss = 1.03 seconds; Gp = 77° Version =
Event ID	us 6000rve6

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2025-12-16 23:34:14 (M5.1) Kuril Islands 44.4 149.6 (70fa9)

M5.1 Earthquake - Kuril Islands

Preliminary Report

Magnitude	5.1
Date-Time	Universal Time (UTC): 16 Dec 2025 23:34:15 Time near the Epicenter (1): 17 Dec 2025 10:34:15 Time in your area (1): 17 Dec 2025 05:04:15
Location	44.380N 149.558E
Depth	35 km
Distances	162.8 km (101.0 mi) SE of Kuril'sk, Russia 341.1 km (211.5 mi) ENE of Nemuro, Japan 363.8 km (225.5 mi) E of Shibetsu, Japan 379.4 km (235.2 mi) ENE of Nakashibetsu, Japan 603.4 km (374.1 mi) ESE of Yuzhno-Sakhalinsk, Russia
Location Uncertainty	Horizontal: 10.8 km; Vertical 1.7 km
Parameters	Nph = 40; Dmin = 557.1 km; Rmss = 1.27 seconds; Gp = 113° Version =
Event ID	us 6000rvd5

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2025-12-16 23:35:25 UPDATED: (M5.0) Gulf of Alaska 56.4 -148.8 (70fa9)

M5.0 Earthquake - Gulf of Alaska

Preliminary Report

Magnitude	5.0
Date-Time	Universal Time (UTC): 16 Dec 2025 23:35:25 Time near the Epicenter (1): 16 Dec 2025 13:35:25 Time in your area (1): 17 Dec 2025 05:05:25
Location	56.430N 148.779W
Depth	8 km
Distances	250.0 km (155.0 mi) ESE of Chiniak, Alaska 537.2 km (333.1 mi) S of Anchorage, Alaska 546.7 km (339.0 mi) S of Eagle River, Alaska 568.1 km (352.2 mi) S of Knik-Fairview, Alaska 887.0 km (549.9 mi) WSW of Juneau, Alaska
Location Uncertainty	Horizontal: 8.8 km; Vertical 8.4 km
Parameters	Nph = 33; Dmin = 275.7 km; Rmss = 0.63 seconds; Gp = 140° Version =
Event ID	us 6000rvd3

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2025-12-16 13:45:25 (M5.0) southern Mid-Atlantic Ridge -43.8 -16.3 (70fa9)

M5.0 Earthquake - southern Mid-Atlantic Ridge

Preliminary Report

Magnitude	5.0
Date-Time	Universal Time (UTC): 16 Dec 2025 13:45:26 Time near the Epicenter (1): 16 Dec 2025 12:45:26 Time in your area (1): 16 Dec 2025 19:15:26
Location	43.780S 16.313W
Depth	10 km
Distances	818.8 km (507.6 mi) SSW of Edinburgh of the Seven Seas, Saint Helena 3176.7 km (1969.6 mi) W of Retreat, South Africa 3179.8 km (1971.5 mi) W of Cape Town, South Africa 3180.0 km (1971.6 mi) W of Claremont, South Africa 3181.9 km (1972.8 mi) W of Rondebosch, South Africa
Location Uncertainty	Horizontal: 13.4 km; Vertical 1.9 km
Parameters	Nph = 30; Dmin = 818.9 km; Rmss = 0.34 seconds; Gp = 91° Version =
Event ID	us 6000rv9r

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2025-12-16 13:44:14 (M5.1) southern Mid-Atlantic Ridge -43.7 -16.3 (70fa9)

M5.1 Earthquake - southern Mid-Atlantic Ridge

Preliminary Report

Magnitude	5.1
Date-Time	Universal Time (UTC): 16 Dec 2025 13:44:15 Time near the Epicenter (1): 16 Dec 2025 12:44:15 Time in your area (1): 16 Dec 2025 19:14:15
Location	43.724S 16.270W
Depth	10 km
Distances	811.7 km (503.3 mi) SSW of Edinburgh of the Seven Seas, Saint Helena 3172.4 km (1966.9 mi) W of Retreat, South Africa 3175.4 km (1968.8 mi) W of Cape Town, South Africa 3175.7 km (1969.0 mi) W of Claremont, South Africa 3177.6 km (1970.1 mi) W of Rondebosch, South Africa
Location Uncertainty	Horizontal: 10.9 km; Vertical 1.9 km
Parameters	Nph = 46; Dmin = 1878.6 km; Rmss = 0.57 seconds; Gp = 87° Version =
Event ID	us 6000rv9p

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2025-12-16 09:18:45 (M5.3) Solomon Islands -11.7 163.4 (70fa9)

M5.3 Earthquake - Solomon Islands

Preliminary Report

Magnitude	5.3
Date-Time	Universal Time (UTC): 16 Dec 2025 09:18:45 Time near the Epicenter (1): 16 Dec 2025 20:18:45 Time in your area (1): 16 Dec 2025 14:48:45
Location	11.703S 163.373E
Depth	10 km
Distances	210.4 km (130.4 mi) SE of Kirakira, Solomon Islands 451.0 km (279.6 mi) ESE of Honiara, Solomon Islands 457.4 km (283.6 mi) ESE of Malango, Solomon Islands 588.6 km (364.9 mi) NW of Luganville, Vanuatu 853.5 km (529.2 mi) NW of Port-Vila, Vanuatu
Location Uncertainty	Horizontal: 8.4 km; Vertical 1.9 km
Parameters	Nph = 60; Dmin = 450.4 km; Rmss = 0.90 seconds; Gp = 55° Version =
Event ID	us 6000rv8z

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2025-12-15 23:41:48 (M5.3) Ionian Sea 37.5 20.2 (70fa9)

M5.3 Earthquake - Ionian Sea

Preliminary Report

Magnitude	5.3
Date-Time	Universal Time (UTC): 15 Dec 2025 23:41:48 Time near the Epicenter (1): 16 Dec 2025 00:41:48 Time in your area (1): 16 Dec 2025 05:11:48
Location	37.476N 20.230E
Depth	13 km
Distances	59.5 km (36.9 mi) WSW of Lithakiá, Greece 67.8 km (42.0 mi) WSW of Zakynthos, Greece 105.2 km (65.2 mi) WSW of Amaliáda, Greece 109.3 km (67.7 mi) WSW of Pýrgos, Greece 157.5 km (97.7 mi) WSW of Pátra, Greece
Location Uncertainty	Horizontal: 5.3 km; Vertical 4.3 km
Parameters	Nph = 70; Dmin = 153.8 km; Rmss = 1.37 seconds; Gp = 46° Version =
Event ID	us 6000rv5e

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2025-12-15 23:06:14 UPDATED: (M5.7) Rota region, Northern Mariana Islands 14.3 145.8 (70fa9)

M5.7 Earthquake - Rota region, Northern Mariana Islands

Preliminary Report

Magnitude	5.7
Date-Time	Universal Time (UTC): 15 Dec 2025 23:06:15 Time near the Epicenter (1): 16 Dec 2025 10:06:15 Time in your area (1): 16 Dec 2025 04:36:15
Location	14.350N 145.839E
Depth	99 km
Distances	72.4 km (44.9 mi) SSE of San Jose Village, Northern Mariana Islands 95.8 km (59.4 mi) S of Saipan, Northern Mariana Islands 136.6 km (84.7 mi) NE of Yigo Village, Guam 142.0 km (88.0 mi) NE of Dededo Village, Guam 148.9 km (92.3 mi) NE of Tamuning-Tumon-Harmon Village, Guam
Location Uncertainty	Horizontal: 7.5 km; Vertical 5.5 km
Parameters	Nph = 87; Dmin = 97.9 km; Rmss = 1.11 seconds; Gp = 38° Version =
Event ID	us 6000rv4q

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2025-12-15 19:48:31 (M5.0) Southwest Indian Ridge -28.3 62.8 (70fa9)

M5.0 Earthquake - Southwest Indian Ridge

Preliminary Report

Magnitude	5.0
Date-Time	Universal Time (UTC): 15 Dec 2025 19:48:31 Time near the Epicenter (1): 15 Dec 2025 23:48:31 Time in your area (1): 16 Dec 2025 01:18:31
Location	28.305S 62.794E
Depth	10 km
Distances	955.8 km (592.6 mi) S of Baie aux Huîtres, Mauritius 957.0 km (593.4 mi) S of Port Mathurin, Mauritius 1015.2 km (629.4 mi) SSE of Plaine Magnien, Mauritius 1015.7 km (629.7 mi) SSE of Mahébourg, Mauritius 1016.2 km (630.0 mi) SSE of Surinam, Mauritius
Location Uncertainty	Horizontal: 8.9 km; Vertical 1.9 km
Parameters	Nph = 51; Dmin = 948.2 km; Rmss = 1.01 seconds; Gp = 52° Version =
Event ID	us 6000rv2c

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2025-12-15 18:03:53 UPDATED: (M5.0) Andreanof Islands, Aleutian Islands, Alaska 51.5 -176.5 (70fa9)

M5.0 Earthquake - Andreanof Islands, Aleutian Islands, Alaska

Preliminary Report

Magnitude	5.0
Date-Time	Universal Time (UTC): 15 Dec 2025 18:03:53 Time near the Epicenter (1): 15 Dec 2025 08:03:53 Time in your area (1): 15 Dec 2025 23:33:53
Location	51.518N 176.454W
Depth	56 km
Distances	41.5 km (25.7 mi) SSE of Adak, Alaska 1512.7 km (937.9 mi) S of Anadyr, Russia 1575.6 km (976.9 mi) ESE of Klyuchi, Russia 1700.2 km (1054.1 mi) ESE of Petropavlovsk-Kamchatsky, Russia 1715.7 km (1063.7 mi) ESE of Yelizovo, Russia
Location Uncertainty	Horizontal: 4.6 km; Vertical 2.8 km
Parameters	Nph = 113; Dmin = 38.5 km; Rmss = 0.73 seconds; Gp = 136° Version =
Event ID	us 6000rv18 ***This event supersedes event AK2025yqeqgg.

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2025-12-15 00:43:17 (M5.2) South Sandwich Islands region -58.7 -25.7 (70fa9)

M5.2 Earthquake - South Sandwich Islands region

Preliminary Report

Magnitude	5.2
Date-Time	Universal Time (UTC): 15 Dec 2025 00:43:18 Time near the Epicenter (1): 14 Dec 2025 22:43:18 Time in your area (1): 15 Dec 2025 06:13:18
Location	58.717S 25.723W
Depth	94 km
Distances	2546.2 km (1578.6 mi) E of Tolhuin, Argentina 2595.1 km (1609.0 mi) E of Ushuaia, Argentina 2613.9 km (1620.6 mi) E of Río Grande, Argentina 2826.1 km (1752.2 mi) E of Río Gallegos, Argentina 2833.3 km (1756.6 mi) E of Punta Arenas, Chile
Location Uncertainty	Horizontal: 12.1 km; Vertical 7.1 km
Parameters	Nph = 48; Dmin = 826.0 km; Rmss = 0.56 seconds; Gp = 75° Version =
Event ID	us 6000ruvy

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2025-12-14 14:26:53 (M5.1) near the west coast of Honshu, Japan 37.1 136.6 (70fa9)

M5.1 Earthquake - near the west coast of Honshu, Japan

Preliminary Report

Magnitude	5.1
Date-Time	Universal Time (UTC): 14 Dec 2025 14:26:54 Time near the Epicenter (1): 14 Dec 2025 23:26:54 Time in your area (1): 14 Dec 2025 19:56:54
Location	37.092N 136.587E
Depth	29 km
Distances	29.0 km (18.0 mi) NW of Hakui, Japan 32.0 km (19.8 mi) WSW of Anamizu, Japan 34.1 km (21.2 mi) W of Nanao, Japan 44.3 km (27.5 mi) NW of Himimachi, Japan 54.6 km (33.9 mi) N of Kanazawa, Japan
Location Uncertainty	Horizontal: 6.0 km; Vertical 4.7 km
Parameters	Nph = 57; Dmin = 156.6 km; Rmss = 0.90 seconds; Gp = 58° Version =
Event ID	us 6000rutf

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2025-12-14 12:03:27 (M5.0) Molucca Sea 2.0 126.4 (70fa9)

M5.0 Earthquake - Molucca Sea

Preliminary Report

Magnitude	5.0
Date-Time	Universal Time (UTC): 14 Dec 2025 12:03:28 Time near the Epicenter (1): 14 Dec 2025 20:03:28 Time in your area (1): 14 Dec 2025 17:33:28
Location	1.997N 126.439E
Depth	60 km
Distances	158.3 km (98.1 mi) ENE of Bitung, Indonesia 169.9 km (105.3 mi) NW of Ternate, Indonesia 177.2 km (109.9 mi) W of Tobelo, Indonesia 185.9 km (115.2 mi) ENE of Manado, Indonesia 186.3 km (115.5 mi) ENE of Tondano, Indonesia
Location Uncertainty	Horizontal: 7.5 km; Vertical 6.9 km
Parameters	Nph = 81; Dmin = 320.4 km; Rmss = 0.81 seconds; Gp = 55° Version =
Event ID	us 6000rut1

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2025-12-14 09:44:42 (M5.2) southeast of Easter Island -35.8 -102.3 (70fa9)

M5.2 Earthquake - southeast of Easter Island

Preliminary Report

Magnitude	5.2
Date-Time	Universal Time (UTC): 14 Dec 2025 09:44:43 Time near the Epicenter (1): 14 Dec 2025 02:44:43 Time in your area (1): 14 Dec 2025 15:14:43
Location	35.782S 102.319W
Depth	10 km
Distances	1170.3 km (725.6 mi) SE of Hanga Roa, Chile 2552.6 km (1582.6 mi) WNW of Ancud, Chile 2559.8 km (1587.1 mi) WNW of Lebu, Chile 2563.8 km (1589.6 mi) WNW of Castro, Chile 2587.6 km (1604.3 mi) WNW of Valdivia, Chile
Location Uncertainty	Horizontal: 15.5 km; Vertical 1.9 km
Parameters	Nph = 49; Dmin = 2664.5 km; Rmss = 0.67 seconds; Gp = 152° Version =
Event ID	us 6000rusr

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2025-12-14 00:58:14 (M5.1) southern Sumatra, Indonesia -3.3 101.3 (70fa9)

M5.1 Earthquake - southern Sumatra, Indonesia

Preliminary Report

Magnitude	5.1
Date-Time	Universal Time (UTC): 14 Dec 2025 00:58:14 Time near the Epicenter (1): 14 Dec 2025 07:58:14 Time in your area (1): 14 Dec 2025 06:28:14
Location	3.264S 101.314E
Depth	54 km
Distances	121.3 km (75.2 mi) WNW of Bengkulu, Indonesia 133.8 km (83.0 mi) S of Sungai Penuh, Indonesia 136.1 km (84.4 mi) W of Curup, Indonesia 172.1 km (106.7 mi) W of Lubuklinggau, Indonesia 215.4 km (133.5 mi) SSW of Muara Bungo, Indonesia
Location Uncertainty	Horizontal: 7.6 km; Vertical 4.8 km
Parameters	Nph = 61; Dmin = 218.8 km; Rmss = 0.77 seconds; Gp = 114° Version =
Event ID	us 6000rur4

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