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Knik-Fairview, Matanuska-Susitna, Alaska (967.3 km NNE of epicenter) [Map] / not felt (reported through our app)
Moderate mag. 5.0 earthquake - 89 Km SE of Sand Point, Alaska, USA, on 20 Oct 12:37 am (GMT -8)
This quake was likely an aftershock of the 7.6 quake 60 mi southeast of Sandpoint, Aleutians East, Alaska, USA, Oct 19, 2020 11:54 am (GMT -9), which had occurred 12 hours earlier.
Moderate magnitude 5.0 earthquake at 33 km depth
20 Oct 08:44 UTC: First to report: USGS after 7 minutes.
20 Oct 08:50: Magnitude recalculated from 5.1 to 5.0. Hypocenter depth recalculated from 17.0 to 33.3 km (from 10.6 to 21 mi). Epicenter location corrected by 4.4 km (2.7 mi) towards SSW.
20 Oct 08:50: Magnitude recalculated from 5.1 to 5.0. Hypocenter depth recalculated from 17.0 to 33.3 km (from 10.6 to 21 mi). Epicenter location corrected by 4.4 km (2.7 mi) towards SSW.
Earthquake details
| Date & time | Oct 20, 2020 08:37:14 UTC |
| Local time at epicenter | 20 Oct 12:37 am (GMT -8) |
| Status | Confirmed |
| Magnitude | 5 |
| Depth | 33.3 km |
| Epicenter latitude / longitude | 54.6484°N / 159.6909°W  (Alaska, United States) |
| Antipode | 54.648°S / 20.309°E |
| Shaking intensity | Light shaking near epicenter |
| Felt | 0 reports |
| Primary data source | USGS (United States Geological Survey) |
| Nearest volcano | Stepovak Bay 2 (142 km / 88 mi) |
| Nearby towns and cities | 92 km (57 mi) SE of Sand Point (pop: 1,060) | Show on map | Quakes nearby 145 km (90 mi) SSW of Perryville (pop: 113) | Show on map | Quakes nearby 174 km (108 mi) ESE of King Cove (pop: 1,010) | Show on map | Quakes nearby 178 km (111 mi) SE of Nelson Lagoon (pop: 52) | Show on map | Quakes nearby 188 km (117 mi) SSW of Chignik Lake (pop: 73) | Show on map | Quakes nearby 199 km (123 mi) SSW of Chignik Lagoon (pop: 78) | Show on map | Quakes nearby 203 km (126 mi) ESE of Cold Bay (pop: 123) | Show on map | Quakes nearby 240 km (149 mi) E of False Pass (pop: 40) | Show on map | Quakes nearby 264 km (164 mi) SSW of Port Heiden (pop: 98) | Show on map | Quakes nearby 398 km (247 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: 61%, wind: 7 m/s (13 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 | 33 km | 89 Km SE of Sand Point, Alaska, USA | USGS |
| 5.2 | 30 km | South of Alaska, USA | GFZ |
| 5.0 | 27 km | South Of Alaska, USA | EMSC |
| 5.0 | 25 km | South of Alaska, USA | GeoAu |
User reports for this quake (1)
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Earlier earthquakes in the same area
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