Strong mag. 5.9 earthquake - Gulf of Alaska, 42 mi southeast of Sandpoint, Aleutians East, Alaska, USA, on 5 Oct 9:54 pm (GMT -8) -

This quake was likely an aftershock of the 7.8 quake Gulf of Alaska, 31 mi east of Simeonof Island, Aleutians East, Alaska, USA, July, 22 2020 06:12 GMT, which had occurred 11 weeks earlier.
Strong mag. 5.9 earthquake - Gulf of Alaska, 42 mi southeast of Sandpoint, Aleutians East, Alaska, USA, on 5 Oct 9:54 pm (GMT -8)

Strong magnitude 5.9 earthquake at 30 km depth

6 Oct 06:00 UTC: First to report: USGS after 5 minutes.
6 Oct 06:08: Magnitude recalculated from 5.8 to 5.6. Hypocenter depth recalculated from 21.0 to 21.4 km (from 13 to 13.3 mi). Epicenter location corrected by 13.7 km (8.5 mi) towards S.
6 Oct 06:13: Magnitude recalculated from 5.6 to 5.9. Hypocenter depth recalculated from 21.4 to 30.4 km (from 13.3 to 18.9 mi). Epicenter location corrected by 1.9 km (1.2 mi) towards S.
Date & time: Oct 6, 2020 05:54:50 UTC -
Local time at epicenter: 5 Oct 9:54 pm (GMT -8)
Magnitude: 5.9
Depth: 30.4 km
Epicenter latitude / longitude: 54.8444°N / 159.8598°W (Gulf of Alaska, Alaska, United States)
Antipode: 54.844°S / 20.14°E
Nearest volcano: Stepovak Bay 2 (104 km / 65 mi)
Nearby towns and cities:
68 km (42 mi) SE of Sandpoint (pop: 1,060) --> See nearby quakes!
127 km (79 mi) SSW of Perryville (pop: 113) --> See nearby quakes!
154 km (96 mi) SE of Nelson Lagoon (pop: 52) --> See nearby quakes!
159 km (99 mi) E of King Cove (pop: 1,010) --> See nearby quakes!
171 km (107 mi) SSW of Chignik Lake (pop: 73) --> See nearby quakes!
183 km (114 mi) SSW of Chignik Lagoon (pop: 78) --> See nearby quakes!
186 km (116 mi) E of Cold Bay (pop: 123) --> See nearby quakes!
390 km (242 mi) ENE of Akutan (pop: 1,040) --> See nearby quakes!
446 km (277 mi) ENE of Unalaska (pop: 4,490) --> See nearby quakes!
446 km (277 mi) ENE of Dutch Harbor (pop: 4,380) --> See nearby quakes!
Weather at epicenter at time of quake:
Light Rain 8°C (46 F), humidity: 75%, wind: 9 m/s (17 kts) from NNW
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 4.5 x 1013 joules (12.4 gigawatt hours, equivalent to 10676 tons of TNT or 0.7 atomic bombs!) 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.
Mag.DepthLocationSource
5.930 km68 Km SE of Sand Point, Alaska, USAUSGS
5.930 kmSouth of Alaska, USAGFZ
5.930 kmSouth Of Alaska, USAEMSC
5.936 kmSouth of Alaska, USAGeoAu
5.910 kmAlaska Peninsula, USABMKG

User reports for this quake (31)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Glendale, Los Angeles, California (3939.6 km ESE of epicenter) [Map] / Very weak shaking (MMI II) / 1-2 s : A very shallow jolt. I thought was somebody climbing stairs but wasn't. Precise time so I assumed was an aftershock.  
Rancho Cucamonga, California, USA (3974.5 km ESE of epicenter) [Map] / not felt : Not felt  
Riverside, CA (3992.9 km ESE of epicenter) [Map] / not felt
Grass Valley, CA (3357 km ESE of epicenter) [Map] / not felt
Lakewood, Pierce, Washington (2714.9 km E of epicenter) [Map] / not felt
Tucson az 85712 (9.4 km NE of epicenter) [Map] / not felt
Kodiak (564 km NE of epicenter) [Map] / not felt
Caliente, Lincoln, Nevada (3887.9 km E of epicenter) [Map] / not felt : In bed sleeping 17 hours ago - did not feel anything.  
Anchor point, AK (743.2 km NE of epicenter) [Map] / not felt : I didn't feel a thing (reported through our app)  
unspecified (486 km NE of epicenter) [Map] / not felt (reported through our app)
Chignik, Lake and Peninsula County, Alaska (184.2 km NNE of epicenter) [Map] / Moderate shaking (MMI V) / horizontal (sideways) swinging / 10-15 s (reported through our app)
unspecified (126.5 km NNE of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 10-15 s (reported through our app)
29512 Peoria Road, Halsey OR 97348 / not felt : Tamara Gabrielsen: Halsey, Oregon address. Physically located on the bank of the Willamette river, in the village of Peoria.  
Fairhope / not felt : About 2 years ago my windows shook on and off. Reported the activity to USGS. My husband also experienced it. Are there any earthquake monitors this far south around Mobile Bay, eastern shore?  
Salem, Oregon / not felt
Anchorage, Alaska ship creek / Light shaking (MMI IV) / single lateral shake / 10-15 s : I was laying in bed and the bed started shaking my first earthquake It was like around 1am or so  
98387 zipcode / not felt
Big Bear Lake,California. 92315 / Light shaking (MMI IV) / single vertical bump / very short : Know worry  
Southern California / not felt : Didn't know there was an earthquake. If it was here, I'd know.  
Ritzville / not felt
Baldwin Park,CA / not felt
Phoenix / not felt : Arizona  
Sacramento / not felt
King Cove / Moderate shaking (MMI V)
Fairfield, Texas / not felt
Franklin, NC / not felt
Eugene, OR / not felt
Seattle / not felt
eugene, or / not felt
Fairhope / not felt
Sand Point / Moderate shaking (MMI V)
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