Mag. 3.7 earthquake - Gulf of Alaska, 46 mi south of Sand Point, Aleutians East County, Alaska, USA, on Wednesday, 22 July 2020 at 15:21 (GMT) -
This quake was likely an aftershock of the 7.8 quake Gulf of Alaska, 31 mi east of Simeonof Island, Aleutians East County, Alaska, USA, 22 July 2020 06:12 GMT, which had occurred 9 hours earlier.
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Minor magnitude 3.7 earthquake at 23 km depth
22 Jul 15:34 UTC: First to report: USGS after 13 minutes.
Jul 22 21:32: Magnitude recalculated from 3.4 to 3.7.
Hypocenter depth recalculated from 15.4 to 23.3 km.
Jul 22 21:32: Magnitude recalculated from 3.4 to 3.7.
Hypocenter depth recalculated from 15.4 to 23.3 km.
Magnitude: 3.7
Depth: 23.3 km
Epicenter latitude / longitude: 54.6736°N / 160.6044°W
(Gulf of Alaska, Alaska, United States)Nearest volcano: Dana (104 km / 65 mi)
Nearby towns and cities:
74 km (46 mi) S of Sand Point (pop: 1,060) --> See nearby quakes!
118 km (73 mi) ESE of King Cove (pop: 1,010) --> See nearby quakes!
147 km (91 mi) ESE of Cold Bay (pop: 123) --> See nearby quakes!
152 km (95 mi) SSE of Nelson Lagoon (pop: 52) --> See nearby quakes!
166 km (103 mi) SW of Perryville (pop: 113) --> See nearby quakes!
181 km (113 mi) E of False Pass (pop: 40) --> See nearby quakes!
340 km (211 mi) ENE of Akutan (pop: 1,040) --> See nearby quakes!
395 km (246 mi) ENE of Unalaska (pop: 4,490) --> See nearby quakes!
6202 km (3854 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
6202 km (3854 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
61 km (38 mi) SSW of Shumagin s Island --> See nearby quakes!
69 km (43 mi) W of Chernabura Island --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 2.2 x 1010 joules (6.22 megawatt hours, equivalent to 5.35 tons of TNT) More info
Data for the same earthquake reported by different agencies
Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
| Magnitude | Depth | Location | Source |
| M 3.7 | 23 km | 74 km S of Sand Point, Alaska (USA) | USGS |
| M 3.4 | 15 km | Alaska Peninsula (USA) | EMSC |
User reports for this quake (1)
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Leave a comment if you find a particular report interesting or want to add to it.
Flag as inappropriate.
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Send your own user report!
Charlo MT / Weak shaking (MMI III) : Woke up with a slight rumble and a little c shaking it was after 2:20 am I know that for sure. Even my dogs started howling which they always do when we are about to or is having a earth quake.
Earlier earthquakes in the same area
Mag. 3.7 earthquake - Gulf of Alaska, 46 mi south of Sand Point, Aleutians East County, Alaska, USA, on Wednesday, 22 July 2020 at 15:21 (GMT)
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