Mag. 4.4 earthquake - Gulf of Alaska, 23 mi northeast of Simeonof Island, USA, on Sunday, 26 July 2020 at 10:00 (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 4 days earlier.
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Light magnitude 4.4 earthquake at 34 km depth
26 Jul 10:14 UTC: First to report: USGS after 14 minutes.
Jul 26 20:46: Magnitude recalculated from 4.7 to 4.4.
Hypocenter depth recalculated from 38.7 to 33.7 km.
Jul 26 20:46: Magnitude recalculated from 4.7 to 4.4.
Hypocenter depth recalculated from 38.7 to 33.7 km.
Magnitude: 4.4
Depth: 33.7 km
Epicenter latitude / longitude: 55.0707°N / 158.7582°W
(Gulf of Alaska, Alaska, United States)Nearest volcano: Kupreanof (40 km / 25 mi)
Nearby towns and cities:
97 km (60 mi) SSE of Perryville (pop: 113) --> See nearby quakes!
114 km (71 mi) ESE of Sand Point (pop: 1,060) --> See nearby quakes!
132 km (82 mi) S of Chignik Lake (pop: 73) --> See nearby quakes!
138 km (86 mi) S of Chignik Lagoon (pop: 78) --> See nearby quakes!
227 km (141 mi) E of King Cove (pop: 1,010) --> See nearby quakes!
464 km (288 mi) ENE of Akutan (pop: 1,040) --> See nearby quakes!
483 km (300 mi) SW of Kodiak Station (pop: 1,300) --> See nearby quakes!
494 km (307 mi) SW of Kodiak (pop: 6,250) --> See nearby quakes!
6076 km (3775 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
6076 km (3775 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
38 km (23 mi) ENE of Simeonof Island --> See nearby quakes!
60 km (37 mi) ENE of Chernabura Island --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 2.5 x 1011 joules (69.8 megawatt hours, equivalent to 60 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 4.8 | 10 km | Alaska Peninsula (USA) | GFZ |
| M 4.4 | 34 km | 96 km SSE of Perryville, Alaska (USA) | USGS |
| M 4.7 | 40 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. 4.4 earthquake - Gulf of Alaska, 23 mi northeast of Simeonof Island, USA, on Sunday, 26 July 2020 at 10:00 (GMT)
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