Moderate mag. 5.5 earthquake - Gulf of Alaska, 17 mi south of Sand Point, Aleutians East County, Alaska, USA, on Monday, 27 July 2020 at 19:34 (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 6 days earlier.
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Moderate magnitude 5.5 earthquake at 44 km depth
27 Jul 19:39 UTC: First to report: USGS after 5 minutes.
Jul 27 19:48: Magnitude recalculated from 5.4 to 5.5.
Hypocenter depth recalculated from 28.0 to 44.1 km.
Jul 27 19:48: Magnitude recalculated from 5.4 to 5.5.
Hypocenter depth recalculated from 28.0 to 44.1 km.
Magnitude: 5.5
Depth: 44.1 km
Epicenter latitude / longitude: 55.0965°N / 160.4806°W
(Gulf of Alaska, Alaska, United States)Nearest volcano: Dana (93 km / 58 mi)
Nearby towns and cities:
27 km (17 mi) S of Sand Point (pop: 1,060) --> See nearby quakes!
110 km (69 mi) SSE of Nelson Lagoon (pop: 52) --> See nearby quakes!
117 km (73 mi) E of King Cove (pop: 1,010) --> See nearby quakes!
124 km (77 mi) SW of Perryville (pop: 113) --> See nearby quakes!
143 km (89 mi) E of Cold Bay (pop: 123) --> See nearby quakes!
168 km (104 mi) SW of Chignik Lake (pop: 73) --> See nearby quakes!
357 km (222 mi) ENE of Akutan (pop: 1,040) --> See nearby quakes!
414 km (257 mi) ENE of Unalaska (pop: 4,490) --> See nearby quakes!
6178 km (3839 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
6178 km (3839 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
20 km (12 mi) WSW of Shumagin s Island --> See nearby quakes!
346 km (215 mi) ENE of Rootok Island --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.1 x 1013 joules (3.12 gigawatt hours, equivalent to 2682 tons of TNT or 0.2 atomic bombs!) 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 5.5 | 44 km | 26 km S of Sand Point, Alaska (USA) | USGS |
| M 5.4 | 47 km | Alaska Peninsula (USA) | GFZ |
| M 5.5 | 60 km | Alaska Peninsula (USA) | EMSC |
| M 5.5 | 46 km | Alaska Peninsula (USA) | GeoAu |
| M 4.9 | 513 km | Unimak Island Region, Alaska (USA) | BMKG |
| M 5.5 | 50 km | Alaska Peninsula (USA) | BMKG |
User reports for this quake (2)
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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188.7 km NE of epicenter [Map] / Light shaking (MMI IV) (reported through our app)
Perryville (123 km NE of epicenter) [Map] / Weak shaking (MMI III) : light shaking (reported through our app)
Earlier earthquakes in the same area
Moderate mag. 5.5 earthquake - Gulf of Alaska, 17 mi south of Sand Point, Aleutians East County, Alaska, USA, on Monday, 27 July 2020 at 19:34 (GMT)
Click here to search our database for earlier earthquakes in the same area since 1900!
