Mag. 4.5 earthquake - Gulf of Alaska, 3.9 mi northwest of Big Koniuji Island, Aleutians East County, Alaska, USA, on Friday, 24 July 2020 at 03:12 (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 1 day 21 hours earlier.
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Light magnitude 4.5 earthquake at 48 km depth
24 Jul 03:42 UTC: First to report: USGS after 29 minutes.
Magnitude: 4.5
Depth: 48.2 km
Epicenter latitude / longitude: 55.1761°N / 159.622°W
(Gulf of Alaska, Alaska, United States)Nearest volcano: Stepovak Bay 2 (86 km / 53 mi)
Nearby towns and cities:
58 km (36 mi) ESE of Sand Point (pop: 1,060) --> See nearby quakes!
87 km (54 mi) SSW of Perryville (pop: 113) --> See nearby quakes!
132 km (82 mi) SSW of Chignik Lake (pop: 73) --> See nearby quakes!
146 km (91 mi) SSW of Chignik (pop: 87) --> See nearby quakes!
172 km (107 mi) E of King Cove (pop: 1,010) --> See nearby quakes!
413 km (256 mi) ENE of Akutan (pop: 1,040) --> See nearby quakes!
469 km (291 mi) ENE of Unalaska (pop: 4,490) --> See nearby quakes!
530 km (329 mi) WSW of Kodiak (pop: 6,250) --> See nearby quakes!
6123 km (3805 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
6123 km (3805 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
6 km (4 mi) NW of Big Koniuji Island --> See nearby quakes!
44 km (27 mi) N of Chernabura Island --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 3.5 x 1011 joules (98.6 megawatt hours, equivalent to 84.8 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 4.5 | 48 km | 58 km ESE of Sand Point, Alaska (USA) | USGS |
| M 3.8 | 43 km | Alaska Peninsula (USA) | EMSC |
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Earlier earthquakes in the same area
Mag. 4.5 earthquake - Gulf of Alaska, 3.9 mi northwest of Big Koniuji Island, Aleutians East County, Alaska, USA, on Friday, 24 July 2020 at 03:12 (GMT)
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