2026-06-18 13:58:28 UPDATED: (M5.0) Andreanof Islands, Aleutian Islands, Alaska 51.4 -179.6 (70fa9)

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

Preliminary Report

Magnitude	5.0
Date-Time	Universal Time (UTC): 18 Jun 2026 13:58:28 Time near the Epicenter (1): 18 Jun 2026 03:58:28 Time in your area (1): 18 Jun 2026 19:28:28
Location	51.354N 179.574W
Depth	35 km
Distances	211.7 km (131.2 mi) WSW of Adak, Alaska 1396.3 km (865.7 mi) ESE of Klyuchi, Russia 1496.3 km (927.7 mi) ESE of Petropavlovsk-Kamchatsky, Russia 1499.8 km (929.8 mi) S of Anadyr, Russia 1511.7 km (937.3 mi) ESE of Vilyuchinsk, Russia
Location Uncertainty	Horizontal: 3.7 km; Vertical 7.5 km
Parameters	Nph = 61; Dmin = 57.4 km; Rmss = 0.97 seconds; Gp = 124° Version =
Event ID	us 7000subg ***This event supersedes event AKa2026lzjqmm.

(1) Nominal Standard Time; local and daylight savings time zone may differ.
For updates, maps, and technical information
see: Event Page or USGS Earthquake Hazards Program
National Earthquake Information Center
U.S. Geological Survey


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2026-06-18 13:58:28 (M5.1) Andreanof Islands, Aleutian Islands, Alaska 51.3 -179.5 (70fa9)

M5.1 Earthquake - Andreanof Islands, Aleutian Islands, Alaska

Preliminary Report

Magnitude	5.1
Date-Time	Universal Time (UTC): 18 Jun 2026 13:58:29 Time near the Epicenter (1): 18 Jun 2026 03:58:29 Time in your area (1): 18 Jun 2026 19:28:29
Location	51.337N 179.547W
Depth	27 km
Distances	210.5 km (130.5 mi) WSW of Adak, Alaska 1398.9 km (867.3 mi) ESE of Klyuchi, Russia 1498.6 km (929.1 mi) ESE of Petropavlovsk-Kamchatsky, Russia 1501.8 km (931.1 mi) S of Anadyr, Russia 1514.0 km (938.7 mi) ESE of Vilyuchinsk, Russia
Location Uncertainty	Horizontal: 5.8 km; Vertical 2.0 km
Parameters	Nph = 171; Dmin = 55.6 km; Rmss = 1.10 seconds; Gp = 200° Version =
Event ID	ak a2026lzjqmm

(1) Nominal Standard Time; local and daylight savings time zone may differ.
For updates, maps, and technical information
see: Event Page or USGS Earthquake Hazards Program
Alaska Earthquake Center
Geophysical Institute, University of Alaska Fairbanks

https://earthquake.alaska.edu

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2026-06-18 03:43:35 (M5.4) central Mid-Atlantic Ridge -0.5 -19.9 (70fa9)

M5.4 Earthquake - central Mid-Atlantic Ridge

Preliminary Report

Magnitude	5.4
Date-Time	Universal Time (UTC): 18 Jun 2026 03:43:36 Time near the Epicenter (1): 18 Jun 2026 02:43:36 Time in your area (1): 18 Jun 2026 09:13:36
Location	0.467S 19.933W
Depth	10 km
Distances	1027.6 km (637.1 mi) NW of Georgetown, Saint Helena 1208.9 km (749.5 mi) SW of Bonthe, Sierra Leone 1229.4 km (762.2 mi) SW of Goderich, Sierra Leone 1236.1 km (766.4 mi) SW of Waterloo, Sierra Leone 1238.0 km (767.5 mi) SW of Freetown, Sierra Leone
Location Uncertainty	Horizontal: 9.2 km; Vertical 1.9 km
Parameters	Nph = 106; Dmin = 1030.3 km; Rmss = 0.65 seconds; Gp = 46° Version =
Event ID	us 7000su8i

(1) Nominal Standard Time; local and daylight savings time zone may differ.
For updates, maps, and technical information
see: Event Page or USGS Earthquake Hazards Program
National Earthquake Information Center
U.S. Geological Survey


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Your account has aftershock exclusion turned on. This event fell into the 'US7000stti' exclusion region, but was large enough to trigger notification.
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2026-06-18 02:44:43 (M5.1) central Mid-Atlantic Ridge -0.3 -19.2 (70fa9)

M5.1 Earthquake - central Mid-Atlantic Ridge

Preliminary Report

Magnitude	5.1
Date-Time	Universal Time (UTC): 18 Jun 2026 02:44:43 Time near the Epicenter (1): 18 Jun 2026 01:44:43 Time in your area (1): 18 Jun 2026 08:14:43
Location	0.342S 19.203W
Depth	10 km
Distances	993.1 km (615.7 mi) NNW of Georgetown, Saint Helena 1144.5 km (709.6 mi) SW of Bonthe, Sierra Leone 1171.0 km (726.0 mi) SW of Goderich, Sierra Leone 1171.8 km (726.5 mi) SW of Robertsport, Liberia 1176.5 km (729.5 mi) SW of Waterloo, Sierra Leone
Location Uncertainty	Horizontal: 10.0 km; Vertical 1.9 km
Parameters	Nph = 69; Dmin = 995.6 km; Rmss = 0.97 seconds; Gp = 49° Version =
Event ID	us 7000su8c

(1) Nominal Standard Time; local and daylight savings time zone may differ.
For updates, maps, and technical information
see: Event Page or USGS Earthquake Hazards Program
National Earthquake Information Center
U.S. Geological Survey


Disclaimer

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