Mag. 4.9 earthquake - Gulf of Alaska, 22 mi west of Chernabura Island, Aleutians East County, Alaska, USA, on Sunday, 26 July 2020 at 21:35 (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 5 days earlier.
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Light magnitude 4.9 earthquake at 34 km depth
26 Jul 21:44 UTC: First to report: USGS after 9 minutes.
Hypocenter depth recalculated from 35.0 to 33.6 km.
Hypocenter depth recalculated from 35.0 to 33.6 km.
Magnitude: 4.9
Depth: 33.6 km
Epicenter latitude / longitude: 54.7791°N / 160.1163°W
(Gulf of Alaska, Alaska, United States)Nearest volcano: Dana (112 km / 70 mi)
Nearby towns and cities:
67 km (41 mi) SSE of Sand Point (pop: 1,060) --> See nearby quakes!
140 km (87 mi) SSW of Perryville (pop: 113) --> See nearby quakes!
144 km (90 mi) E of King Cove (pop: 1,010) --> See nearby quakes!
152 km (95 mi) SSE of Nelson Lagoon (pop: 52) --> See nearby quakes!
172 km (107 mi) ESE of Cold Bay (pop: 123) --> See nearby quakes!
185 km (115 mi) SSW of Chignik Lake (pop: 73) --> See nearby quakes!
200 km (124 mi) SSW of Chignik (pop: 87) --> See nearby quakes!
373 km (232 mi) ENE of Akutan (pop: 1,040) --> See nearby quakes!
6168 km (3833 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
6168 km (3833 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
36 km (22 mi) W of Chernabura Island --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.4 x 1012 joules (392 megawatt hours, equivalent to 338 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 4.9 | 34 km | 66 km SSE of Sand Point, Alaska (USA) | USGS |
| M 4.9 | 35 km | Alaska Peninsula (USA) | EMSC |
| M 5.1 | 31 km | Alaska Peninsula (USA) | GFZ |
| M 4.8 | 25 km | South of Alaska (USA) | BMKG |
| M 4.9 | 23 km | Alaska Peninsula (USA) | GeoAu |
User reports for this quake (4)
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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King Cove, Alaska (142.4 km WNW of epicenter) [Map] / Very weak shaking (MMI II) (reported through our app)
Portage la Prairie, Manitoba, Canada / not felt : Clock jumped off an in tact nail on wall at Approx.11:38-40 pm local time, fell vertically and broke an item as it dropped straight down, clock clasp also undamaged, Portage la Prairie, Mb, Ca. No other continental phenomena or closer quakes on july 26, 2020. No audible Buzz, hum or Low rumble as during other continental quakes. No trains or trucks passing. No shaking of any kind. 2/16th edge on nail head. Possibly related to this quake, or pre-quake Tremor?
Chignik Bay / Very weak shaking (MMI II)
Chignik Bay / Very weak shaking (MMI II)
Earlier earthquakes in the same area
Mag. 4.9 earthquake - Gulf of Alaska, 22 mi west of Chernabura Island, Aleutians East County, Alaska, USA, on Sunday, 26 July 2020 at 21:35 (GMT)
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