Very strong mag. 6.4 earthquake - Gulf of Alaska, 55 mi southeast of Pye s Island, Kenai Peninsula, Alaska, USA, on Saturday, 28 March 1964 at 07:10 (GMT)

Very strong mag. 6.4 earthquake - Gulf of Alaska, 55 mi southeast of Pye s Island, Kenai Peninsula, Alaska, USA, on Saturday, 28 March 1964 at 07:10 (GMT)

Very strong magnitude 6.4 earthquake at 20 km depth

Date & time: 28 Mar 1964 07:10:24 UTC
Magnitude: 6.4
Depth: 20.0 km
Epicenter latitude / longitude: 58.784°N / 149.391°W (Gulf of Alaska, Alaska, United States)
Nearest volcano: Douglas (239 km / 149 mi)
Nearby towns and cities:
138 km (86 mi) SE of Halibut Cove (pop: 76) --> See nearby quakes!
147 km (91 mi) S of Seward (pop: 2,790) --> See nearby quakes!
156 km (97 mi) SE of Homer (pop: 5,520) --> See nearby quakes!
208 km (129 mi) NE of Kodiak (pop: 6,250) --> See nearby quakes!
210 km (130 mi) SSE of Sterling (pop: 5,620) --> See nearby quakes!
211 km (131 mi) SSE of Kalifornsky (pop: 7,850) --> See nearby quakes!
223 km (139 mi) SSE of Kenai (pop: 7,660) --> See nearby quakes!
272 km (169 mi) S of Anchorage (pop: 298,700) --> See nearby quakes!
282 km (175 mi) S of Eagle River (pop: 24,800) --> See nearby quakes!
282 km (175 mi) S of Eagle River (Anchorage) (pop: 24,800) --> 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
6.420 kmGulf of 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.
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Aftershocks

More info
Recorded aftershocks, latest first (3 quakes):
  • 24 Aug 1964 21:56 UTC
    | M 5.5 |
    18.6 km (11.6 mi) depth
    |
    82 km (51 mi) distance
    | USGS | Details
  • 23 Jul 1964 19:08 UTC
    | M 5.6 |
    22.5 km (14 mi) depth
    |
    91 km (57 mi) distance
    | USGS | Details
  • 02 Apr 1964 11:41 UTC
    | M 5.7 |
    21.5 km (13.4 mi) depth
    |
    17 km (10 mi) distance
    | USGS | Details

Earlier earthquakes in the same area

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