Very strong mag. 6.5 earthquake - Gulf of Alaska, 50 mi northeast of Kodiak, Alaska, USA, on Saturday, 28 March 1964 at 06:44 (GMT)

Very strong mag. 6.5 earthquake - Gulf of Alaska, 50 mi northeast of Kodiak, Alaska, USA, on Saturday, 28 March 1964 at 06:44 (GMT)

Very strong magnitude 6.5 earthquake at 25 km depth

Date & time: 28 Mar 1964 06:44:00 UTC
Magnitude: 6.5
Depth: 25.0 km
Epicenter latitude / longitude: 58.205°N / 151.289°W (Gulf of Alaska, Alaska, United States)
Nearest volcano: Douglas (149 km / 93 mi)
Nearby towns and cities:
80 km (50 mi) NE of Kodiak (pop: 6,250) --> See nearby quakes!
80 km (50 mi) NE of Saint Paul (pop: 6,250) --> See nearby quakes!
91 km (57 mi) ENE of Kodiak Station (pop: 1,300) --> See nearby quakes!
161 km (100 mi) S of Homer (pop: 5,520) --> See nearby quakes!
246 km (153 mi) S of Kalifornsky (pop: 7,850) --> See nearby quakes!
261 km (162 mi) S of Sterling (pop: 5,620) --> See nearby quakes!
261 km (162 mi) S of Kenai (pop: 7,660) --> See nearby quakes!
344 km (214 mi) SSW of Anchorage (pop: 298,700) --> See nearby quakes!
360 km (224 mi) SSW of Eagle River (pop: 24,800) --> See nearby quakes!
360 km (224 mi) SSW of Eagle River (Anchorage County) (pop: 24,800) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 3.5 x 1014 joules (98.6 gigawatt hours, equivalent to 84802 tons of TNT or 5.3 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 6.525 kmKodiak Island region, 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 (10 quakes):
  • 24 Aug 1964 21:56 UTC
    | M 5.5 |
    18.6 km (11.6 mi) depth
    |
    47 km (29 mi) distance
    | USGS | Details
  • 28 Jun 1964 19:09 UTC
    | M 5.7 |
    22.5 km (14 mi) depth
    |
    41 km (25 mi) distance
    | USGS | Details
  • 14 Apr 1964 22:55 UTC
    | M 5.6 |
    25 km (15.5 mi) depth
    |
    87 km (54 mi) distance
    | USGS | Details
  • 13 Apr 1964 14:05 UTC
    | M 5.6 |
    26.8 km (16.7 mi) depth
    |
    82 km (51 mi) distance
    | USGS | Details
  • 10 Apr 1964 01:08 UTC
    | M 5.6 |
    20 km (12.4 mi) depth
    |
    32 km (20 mi) distance
    | USGS | Details
  • 29 Mar 1964 01:29 UTC
    | M 5.7 |
    22 km (13.7 mi) depth
    |
    79 km (49 mi) distance
    | USGS | Details
  • 28 Mar 1964 23:46 UTC
    | M 5.6 |
    20 km (12.4 mi) depth
    |
    102 km (63 mi) distance
    | USGS | Details
  • 28 Mar 1964 08:39 UTC
    | M 5.6 |
    22.5 km (14 mi) depth
    |
    87 km (54 mi) distance
    | USGS | Details
  • 28 Mar 1964 08:33 UTC
    | M 5.8 |
    20.8 km (12.9 mi) depth
    |
    23 km (14 mi) distance
    | USGS | Details
  • 28 Mar 1964 07:30 UTC
    | M 5.8 |
    20 km (12.4 mi) depth
    |
    105 km (65 mi) distance
    | USGS | Details

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Earlier earthquakes in the same area

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