Mag. 4.8 earthquake - North Pacific Ocean, 102 mi southeast of Unalaska, USA, on Tuesday, 20 Oct 2020 6:35 pm (GMT -9) -

Mag. 4.8 earthquake  - North Pacific Ocean, 102 mi southeast of Unalaska, USA, on Tuesday, 20 Oct 2020 6:35 pm (GMT -9)

Light magnitude 4.8 earthquake at 39 km depth

21 Oct 03:46 UTC: First to report: GFZ after 11 minutes.
21 Oct 03:50: Now using data updates from USGS
22 Oct 01:56: Hypocenter depth recalculated from 42.0 to 39.0 km (from 26 to 24 mi). Epicenter location corrected by 5.4 km (3.4 mi) towards ESE.
Date & time: 21 Oct 2020 03:35:24 UTC -
Local time at epicenter: Tuesday, 20 Oct 2020 6:35 pm (GMT -9)
Magnitude: 4.8
Depth: 39.0 km
Epicenter latitude / longitude: 52.9586°N / 164.584°W (North Pacific Ocean, Alaska, United States)
Nearest volcano: Akutan (155 km / 96 mi)
Nearby towns and cities:
153 km (95 mi) SSE of Akutan (pop: 1,040) --> See nearby quakes!
165 km (102 mi) SE of Unalaska (pop: 4,490) --> See nearby quakes!
224 km (139 mi) SSW of False Pass (pop: 40) --> See nearby quakes!
276 km (171 mi) SSW of Cold Bay (pop: 123) --> See nearby quakes!
277 km (172 mi) SSW of King Cove (pop: 1,010) --> See nearby quakes!
287 km (178 mi) E of Nikolski (pop: 18) --> See nearby quakes!
375 km (233 mi) SW of Sand Point (pop: 1,060) --> See nearby quakes!
403 km (250 mi) SW of Nelson Lagoon (pop: 52) --> See nearby quakes!
6516 km (4049 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
6516 km (4049 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
130 km (81 mi) SSE of Tigalda Island --> See nearby quakes!
171 km (106 mi) ESE of Peter Island --> See nearby quakes!
Weather at epicenter at time of quake:
Overcast Clouds 7.8°C (46 F), humidity: 74%, wind: 14 m/s (27 kts) from E
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1 x 1012 joules (278 megawatt hours, equivalent to 239 tons of TNT) More info
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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.
MagnitudeDepthLocationSource
M 4.839 km152 Km SSE of Akutan, Alaska, USAUSGS
M 4.840 kmUnimak Island Region, Alaska, USAEMSC
M 5.010 kmUnimak Island Region, Alaska, USAGFZ
M 5.031 kmUnimak Island Region, Alaska, USAGeoAu

User reports for this quake (1)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Akutan (151 km NNW of epicenter) [Map] / Light shaking (MMI IV) / 5-10 s (reported through our app)
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Earlier earthquakes in the same area since 1900

Mag. 4.8 earthquake - North Pacific Ocean, 102 mi southeast of Unalaska, USA, on Tuesday, 20 Oct 2020 6:35 pm (GMT -9)

Map of earlier quakes

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