Moderate mag. 5.0 earthquake - Gulf of Alaska, 43 mi east of Simeonof Island, Aleutians East County, Alaska, USA, on Thursday, 30 July 2020 at 16:08 (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 8 days earlier.
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Moderate magnitude 5.0 earthquake at 2 km depth
30 Jul 16:14 UTC: First to report: USGS after 6 minutes.
Jul 30 16:29: Magnitude recalculated from 5.1 to 4.9.
Hypocenter depth recalculated from 20.0 to 23.2 km.
Jul 30 16:37: Magnitude recalculated from 4.9 to 5.0.
Hypocenter depth recalculated from 23.2 to 1.8 km.
Jul 30 16:29: Magnitude recalculated from 5.1 to 4.9.
Hypocenter depth recalculated from 20.0 to 23.2 km.
Jul 30 16:37: Magnitude recalculated from 4.9 to 5.0.
Hypocenter depth recalculated from 23.2 to 1.8 km.
Magnitude: 5
Depth: 1.8 km
Epicenter latitude / longitude: 54.845°N / 158.1992°W
(Gulf of Alaska, Alaska, United States)Nearest volcano: Kupreanof (157 km / 98 mi)
Nearby towns and cities:
133 km (83 mi) SSE of Perryville (pop: 113) --> See nearby quakes!
156 km (97 mi) ESE of Sand Point (pop: 1,060) --> See nearby quakes!
161 km (100 mi) SSE of Chignik Lake (pop: 73) --> See nearby quakes!
164 km (102 mi) S of Chignik Lagoon (pop: 78) --> See nearby quakes!
229 km (142 mi) ESE of Nelson Lagoon (pop: 52) --> See nearby quakes!
235 km (146 mi) S of Port Heiden (pop: 98) --> See nearby quakes!
264 km (164 mi) E of King Cove (pop: 1,010) --> See nearby quakes!
484 km (301 mi) SW of Kodiak (pop: 6,250) --> See nearby quakes!
6050 km (3759 mi) NW of Washington (District of Columbia) (pop: 601,700) --> See nearby quakes!
6050 km (3759 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
69 km (43 mi) E of Simeonof Island --> See nearby quakes!
87 km (54 mi) E of Chernabura Island --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 2 x 1012 joules (554 megawatt hours, equivalent to 477 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 5.0 | 1.8 km | 132 km SSE of Perryville, Alaska (USA) | USGS |
| M 4.8 | 19 km | Alaska Peninsula (USA) | GFZ |
| M 4.9 | 10 km | Alaska Peninsula (USA) | EMSC |
| M 4.9 | 25 km | South of Alaska (USA) | GeoAu |
| M 5.2 | 99 km | Alaska Peninsula (USA) | BMKG |
User reports for this quake (1)
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
162.9 km N of epicenter [Map] / Moderate shaking (MMI V) (reported through our app)
Earlier earthquakes in the same area
Moderate mag. 5.0 earthquake - Gulf of Alaska, 43 mi east of Simeonof Island, Aleutians East County, Alaska, USA, on Thursday, 30 July 2020 at 16:08 (GMT)
Click here to search our database for earlier earthquakes in the same area since 1900!
