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 mag. 5.0 earthquake - 89 Km SE of Sand Point, Alaska, USA, on 20 Oct 12:37 am (GMT -8) Moderate mag. 5.0 earthquake - 89 Km SE of Sand Point, Alaska, USA, on 20 Oct 12:37 am (GMT -8)

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.

Earthquake details

Date & timeOct 20, 2020 08:37:14 UTC
Local time at epicenter20 Oct 12:37 am (GMT -8)
Depth33.3 km
Epicenter latitude / longitude54.6484°N / 159.6909°W (Alaska, United States)
Antipode54.648°S / 20.309°E
Shaking intensityLight shaking near epicenter
Felt0 reports
Primary data sourceUSGS (United States Geological Survey)
Nearest volcanoStepovak Bay 2 (142 km / 88 mi)
Nearby towns and cities92 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 quakeClear Sky 7.7°C (46 F), humidity: 61%, wind: 7 m/s (13 kts) from NNW
Estimated seismic energy released2 x 1012 joules (554 megawatt hours, equivalent to 477 tons of TNT) | about seismic energy
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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.
5.033 km89 Km SE of Sand Point, Alaska, USAUSGS
5.230 kmSouth of Alaska, USAGFZ
5.027 kmSouth Of Alaska, USAEMSC
5.025 kmSouth of Alaska, USAGeoAu

User reports for this quake (1)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Knik-Fairview, Matanuska-Susitna, Alaska (967.3 km NNE of epicenter) [Map] / not felt (reported through our app)
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