Strong mag. 6.4 earthquake - Alaska Peninsula (USA) on Sunday, 20 May 1979 at 08:14 (GMT)

Strong mag. 6.4 earthquake - Alaska Peninsula (USA) on Sunday, 20 May 1979 at 08:14 (GMT)

Strong magnitude 6.4 earthquake at 71 km depth

Date & time: 20 May 1979 08:14:00 UTC
Magnitude: 6.4
Depth: 71.0 km
Epicenter latitude / longitude: 56.647°N / 156.725°W (Alaska, United States)
Nearest volcano: Yantarni (50 km / 31 mi)
Nearby towns and cities:
105 km (65 mi) SSE of Ugashik (pop: 12) --> See nearby quakes!
117 km (73 mi) ENE of Chignik Lagoon (pop: 78) --> See nearby quakes!
121 km (75 mi) ESE of Port Heiden (pop: 98) --> See nearby quakes!
276 km (172 mi) NE of Sand Point (pop: 1,060) --> See nearby quakes!
278 km (173 mi) WSW of Kodiak Station (pop: 1,300) --> See nearby quakes!
289 km (180 mi) WSW of Kodiak (pop: 6,250) --> See nearby quakes!
451 km (280 mi) SW of Homer (pop: 5,520) --> See nearby quakes!
525 km (326 mi) SW of Kalifornsky (pop: 7,850) --> See nearby quakes!
5901 km (3667 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
5901 km (3667 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> 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 6.471 kmAlaska Peninsula (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 of the 6.4 quake Alaska Peninsula (USA) 20 May 1979 08:14 GMT

More info
Recorded aftershocks, latest first (9 quakes):
  • 18 Jul 1979 19:41 UTC
    | M 4.7 |
    80 km (49.7 mi) depth
    |
    23 km (14 mi) distance
    | USGS | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    13384 km (8317 mi) distance
    | | Details
  • 18 Jul 1979 12:39 UTC
    | M 4.8 |
    57 km (35.4 mi) depth
    |
    16 km (10 mi) distance
    | USGS | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    13384 km (8317 mi) distance
    | | Details
  • 23 May 1979 13:44 UTC
    | M 4.9 |
    71 km (44.1 mi) depth
    |
    13 km (8 mi) distance
    | USGS | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    13384 km (8317 mi) distance
    | | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    13384 km (8317 mi) distance
    | | Details
  • 20 May 1979 11:24 UTC
    | M 4.4 |
    68 km (42.3 mi) depth
    |
    9 km (5 mi) distance
    | USGS | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    13384 km (8317 mi) distance
    | | Details

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Earlier earthquakes in the same area

Strong mag. 6.4 earthquake - Alaska Peninsula (USA) on Sunday, 20 May 1979 at 08:14 (GMT)
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