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Knik-Fairview, Matanuska-Susitna, Alaska (977.2 km NNE of epicenter) [Map] / not felt (reported through our app)
Moderate mag. 5.0 earthquake - 59 mi southeast of Sand Point, Aleutians East, Alaska, USA, on 19 Oct 9:18 pm (GMT -11)
This quake was likely an aftershock of the 7.6 quake 60 mi southeast of Sand Point, Aleutians East, Alaska, USA, Oct 19, 2020 11:54 am (GMT -9), which had occurred 11 hours earlier.
Moderate magnitude 5.0 earthquake at 27 km depth
20 Oct 08:30 UTC: First to report: GFZ after 11 minutes.
20 Oct 09:02: Magnitude recalculated from 4.8 to 5.0. Hypocenter depth recalculated from 10.0 to 27.0 km (from 6.2 to 16.8 mi). Epicenter location corrected by 15.1 km (9.4 mi) towards NE.
20 Oct 09:02: Magnitude recalculated from 4.8 to 5.0. Hypocenter depth recalculated from 10.0 to 27.0 km (from 6.2 to 16.8 mi). Epicenter location corrected by 15.1 km (9.4 mi) towards NE.
Earthquake details
| Date & time | Oct 20, 2020 08:18:42 UTC |
| Local time at epicenter | 19 Oct 9:18 pm (GMT -11) |
| Status | Confirmed |
| Magnitude | 5 |
| Depth | 27.0 km |
| Epicenter latitude / longitude | 54.58°N / 159.79°W  (Gulf of Alaska, United States) |
| Antipode | 54.58°S / 20.21°E |
| Shaking intensity | Light shaking near epicenter |
| Felt | 0 reports |
| Primary data source | GFZ (German Research Centre for Geosciences) |
| Nearest volcano | Dana (149 km / 93 mi) |
| Nearby towns and cities | 96 km (59 mi) SSE of Sand Point (pop: 1,060) | Show on map | Quakes nearby 154 km (95 mi) SSW of Perryville (pop: 113) | Show on map | Quakes nearby 171 km (106 mi) ESE of King Cove (pop: 1,010) | Show on map | Quakes nearby 182 km (113 mi) SSE of Nelson Lagoon (pop: 52) | Show on map | Quakes nearby 197 km (123 mi) SSW of Chignik Lake (pop: 73) | Show on map | Quakes nearby 199 km (124 mi) ESE of Cold Bay (pop: 123) | Show on map | Quakes nearby 208 km (129 mi) SSW of Chignik Lagoon (pop: 78) | Show on map | Quakes nearby 235 km (146 mi) E of False Pass (pop: 40) | Show on map | Quakes nearby 273 km (169 mi) SSW of Port Heiden (pop: 98) | Show on map | Quakes nearby 391 km (243 mi) E of Akutan (pop: 1,040) | Show on map | Quakes nearby |
| Weather at epicenter at time of quake | Clear Sky  7.7°C (46 F), humidity: 64%, wind: 6 m/s (12 kts) from NNW |
| Estimated seismic energy released | 2 x 1012 joules (554 megawatt hours, equivalent to 477 tons of TNT) | about seismic energy |
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.
| Mag. | Depth | Location | Source |
| 5.0 | 27 km | South of Alaska, USA | GFZ |
| 4.8 | 28 km | 103 Km SE of Sand Point, Alaska, USA | USGS |
| 4.8 | 32 km | South Of Alaska, USA | EMSC |
User reports for this quake (1)
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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