Strong mag. 5.5 earthquake - North Pacific Ocean, 127 mi east of Unalaska, Aleutians West (CA) County, Alaska, USA, on Thursday, 27 October 2016 at 12:44 (GMT)
This quake was likely an aftershock of the 5.9 quake North Pacific Ocean, 133 mi east of Unalaska, Aleutians West (CA) County, Alaska, USA, 27 October 2016 11:53 GMT, which had occurred 52 minutes earlier.
Quake Data | Interactive map | User Reports | Earlier quakes in same area | Quakes in the US| Alaska
Strong magnitude 5.5 earthquake at 10 km depth
27 Oct 12:55 UTC: First to report: GFZ after 11 minutes.
Oct 27 12:57: Magnitude recalculated from 5.0 to 5.1.
Oct 27 12:58: Magnitude recalculated from 5.1 to 5.3.
Oct 27 12:58: Magnitude recalculated from 5.3 to 5.4.
Oct 27 12:59: Magnitude recalculated from 5.4 to 5.5.
Oct 27 12:57: Magnitude recalculated from 5.0 to 5.1.
Oct 27 12:58: Magnitude recalculated from 5.1 to 5.3.
Oct 27 12:58: Magnitude recalculated from 5.3 to 5.4.
Oct 27 12:59: Magnitude recalculated from 5.4 to 5.5.
Date & time: 27 Oct 2016 12:44:58 UTC
Magnitude: 5.5
Depth: 10.0 km
Epicenter latitude / longitude: 53.64°N / 163.44°W
(North Pacific Ocean, United States)Nearest volcano: Isanotski (126 km / 78 mi)
Nearby towns and cities:
135 km (84 mi) S of False Pass (pop: 40) --> See nearby quakes!
163 km (101 mi) ESE of Akutan (pop: 1,040) --> See nearby quakes!
174 km (108 mi) SSW of King Cove (pop: 1,010) --> See nearby quakes!
178 km (111 mi) SSW of Cold Bay (pop: 123) --> See nearby quakes!
205 km (127 mi) E of Unalaska (pop: 4,490) --> See nearby quakes!
268 km (166 mi) SW of Sand Point (pop: 1,060) --> See nearby quakes!
299 km (186 mi) SSW of Nelson Lagoon (pop: 52) --> See nearby quakes!
374 km (232 mi) SW of Perryville (pop: 113) --> See nearby quakes!
417 km (259 mi) SW of Chignik Lake (pop: 73) --> See nearby quakes!
431 km (268 mi) SW of Chignik Lagoon (pop: 78) --> See nearby quakes!
Primary data source: GFZ (German Research Centre for Geosciences)
Estimated released energy: 1.1 x 1013 joules (3.12 gigawatt hours, equivalent to 2682 tons of TNT or 0.2 atomic bombs!) 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 5.5 | 10 km | Unimak Island Region, Alaska | GFZ |
| M 5.0 | 20 km | UNIMAK ISLAND REGION, ALASKA | EMSC |
| M 4.9 | 13 km | - 135km S of False Pass, Alaska | USGS |
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
There are no user reports for this quake yet. If you felt it be the first to report it!
Earlier earthquakes in the same area
Click here to search our database for earlier earthquakes in the same area since 1900!
