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 97 Km SE of Sand Point, Alaska, USA, 19 Oct 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.
Local time at epicenter: 20 Oct 12:37 am (GMT -8)
Magnitude: 5.0
Depth: 33.3 km
Epicenter latitude / longitude: 54.6484°N / 159.6909°W
(Alaska, United States)Nearest volcano: Stepovak Bay 2 (142 km / 88 mi)
Nearby towns and cities:
92 km (57 mi) SE of Sand Point (pop: 1,060)
145 km (90 mi) SSW of Perryville (pop: 113)
174 km (108 mi) ESE of King Cove (pop: 1,010)
203 km (126 mi) ESE of Cold Bay (pop: 123)
240 km (149 mi) E of False Pass (pop: 40)
453 km (281 mi) ENE of Unalaska (pop: 4,490)
694 km (431 mi) SSE of Bethel (pop: 6,450)
1594 km (991 mi) W of Juneau (pop: 32,800)
Weather at epicenter at time of quake:
Clear Sky
7.7°C (46 F), humidity: 61%, wind: 7 m/s (13 kts) from NNW
Primary data source: USGS
Clear Sky
7.7°C (46 F), humidity: 61%, wind: 7 m/s (13 kts) from NNWEstimated released energy: 2 x 1012 joules (554 megawatt hours, equivalent to 477 tons of TNT) More info
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.
| Magnitude | Depth | Location | Source |
| M 5.0 | 33 km | 89 Km SE of Sand Point, Alaska, USA | USGS |
| M 5.2 | 30 km | South of Alaska, USA | GFZ |
| M 5.0 | 27 km | South Of Alaska, USA | EMSC |
| M 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.
967.3 km NNE of epicenter [Map] / not felt (reported through our app)
Earlier earthquakes in the same area
Moderate mag. 5.0 earthquake - 89 Km SE of Sand Point, Alaska, USA, on 20 Oct 12:37 am (GMT -8)Click here to search our database for earlier earthquakes in the same area since 1900!
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