Very strong mag. 6.4 earthquake - North Pacific Ocean, 91 mi south of Unalaska, Aleutians West (CA) County, Alaska, USA, on Tuesday, 13 October 2009 at 20:21 (GMT)

Very strong mag. 6.4 earthquake - North Pacific Ocean, 91 mi south of Unalaska, Aleutians West (CA) County, Alaska, USA, on Tuesday, 13 October 2009 at 20:21 (GMT)

Very strong magnitude 6.4 earthquake at 14 km depth

Date & time: 13 Oct 2009 20:21:53 UTC
Magnitude: 6.4
Depth: 14.0 km
Epicenter latitude / longitude: 52.604°N / 167.118°W (North Pacific Ocean, Alaska, United States)
Nearest volcano: Okmok (113 km / 70 mi)
Nearby towns and cities:
123 km (76 mi) ESE of Nikolski (pop: 18) --> See nearby quakes!
147 km (91 mi) SSW of Unalaska (pop: 4,490) --> See nearby quakes!
192 km (119 mi) SSW of Akutan (pop: 1,040) --> See nearby quakes!
349 km (217 mi) SW of False Pass (pop: 40) --> See nearby quakes!
407 km (253 mi) SW of Cold Bay (pop: 123) --> See nearby quakes!
417 km (259 mi) SW of King Cove (pop: 1,010) --> See nearby quakes!
529 km (329 mi) WSW of Sand Point (pop: 1,060) --> See nearby quakes!
538 km (334 mi) SW of Nelson Lagoon (pop: 52) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 2.5 x 1014 joules (69.8 gigawatt hours, equivalent to 60036 tons of TNT or 3.8 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.
MagnitudeDepthLocationSource
M 6.414 kmFox Islands, Aleutian Islands, Alaska (USA)USGS
Note: for quakes of 2012 and earlier, our database often contains only records from 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!
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Aftershocks

More info
Recorded aftershocks, latest first (176 quakes):
  • 11 Apr 2010 07:05 UTC
    | M 2.6 |
    0.4 km (0.2 mi) depth
    |
    27 km (17 mi) distance
    | USGS | Details
  • 10 Apr 2010 20:48 UTC
    | M 3.3 |
    6.4 km (4 mi) depth
    |
    17 km (10 mi) distance
    | USGS | Details
  • 10 Apr 2010 13:43 UTC
    | M 2.5 |
    19.6 km (12.2 mi) depth
    |
    84 km (52 mi) distance
    | USGS | Details
  • 09 Apr 2010 18:40 UTC
    | M 2.2 |
    80 km (49.7 mi) depth
    |
    73 km (46 mi) distance
    | USGS | Details
  • 08 Apr 2010 23:13 UTC
    | M 2.0 |
    27.1 km (16.8 mi) depth
    |
    90 km (56 mi) distance
    | USGS | Details
  • 08 Apr 2010 03:19 UTC
    | M 2.3 |
    25 km (15.5 mi) depth
    |
    66 km (41 mi) distance
    | USGS | Details
  • 07 Apr 2010 22:32 UTC
    | M 2.1 |
    7.9 km (4.9 mi) depth
    |
    52 km (32 mi) distance
    | USGS | Details
  • 07 Apr 2010 04:41 UTC
    | M 1.7 |
    26.1 km (16.2 mi) depth
    |
    67 km (42 mi) distance
    | USGS | Details
  • 06 Apr 2010 22:01 UTC
    | M 2.3 |
    7 km (4.3 mi) depth
    |
    16 km (10 mi) distance
    | USGS | Details
  • 06 Apr 2010 19:32 UTC
    | M 2.3 |
    18.7 km (11.6 mi) depth
    |
    96 km (60 mi) distance
    | USGS | Details
  • 06 Apr 2010 16:26 UTC
    | M 1.8 |
    25.5 km (15.8 mi) depth
    |
    55 km (34 mi) distance
    | USGS | Details
  • 06 Apr 2010 05:08 UTC
    | M 2.0 |
    59.9 km (37.2 mi) depth
    |
    61 km (38 mi) distance
    | USGS | Details
  • 04 Apr 2010 17:32 UTC
    | M 2.0 |
    25 km (15.5 mi) depth
    |
    70 km (43 mi) distance
    | USGS | Details
  • 04 Apr 2010 15:15 UTC
    | M 2.3 |
    25 km (15.5 mi) depth
    |
    26 km (16 mi) distance
    | USGS | Details
  • 04 Apr 2010 13:56 UTC
    | M 3.4 |
    25.9 km (16.1 mi) depth
    |
    21 km (13 mi) distance
    | USGS | Details
  • 03 Apr 2010 15:25 UTC
    | M 1.8 |
    35.4 km (22 mi) depth
    |
    52 km (32 mi) distance
    | USGS | Details
    • Show all

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Earlier earthquakes in the same area

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