Strong mag. 6.0 earthquake - Gulf of Alaska, 80 mi south of Kodiak, Alaska, USA, on Thursday, 1 August 1974 at 07:59 (GMT)

Strong mag. 6.0 earthquake - Gulf of Alaska, 80 mi south of Kodiak, Alaska, USA, on Thursday, 1 August 1974 at 07:59 (GMT)

Strong magnitude 6.0 earthquake at 33 km depth

Date & time: 1 Aug 1974 07:59:56 UTC
Magnitude: 6
Depth: 33.0 km
Epicenter latitude / longitude: 56.632°N / 152.265°W (Gulf of Alaska, Alaska, United States)
Nearest volcano: Unnamed 57.87°N/155.42°W (234 km / 145 mi)
Nearby towns and cities:
90 km (56 mi) SE of Old Harbor (pop: 221) --> See nearby quakes!
128 km (79 mi) S of Kodiak Station (pop: 1,300) --> See nearby quakes!
129 km (80 mi) S of Kodiak (pop: 6,250) --> See nearby quakes!
337 km (210 mi) S of Homer (pop: 5,520) --> See nearby quakes!
350 km (217 mi) S of Fritz Creek (pop: 1,930) --> See nearby quakes!
351 km (218 mi) S of Anchor Point (pop: 1,930) --> See nearby quakes!
425 km (264 mi) S of Kalifornsky (pop: 7,850) --> See nearby quakes!
435 km (270 mi) S of Soldotna (pop: 4,540) --> See nearby quakes!
440 km (273 mi) S of Kenai (pop: 7,660) --> See nearby quakes!
443 km (275 mi) S of Sterling (pop: 5,620) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 6.3 x 1013 joules (17.5 gigawatt hours, equivalent to 15080 tons of TNT or 0.9 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 6.033 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 (16 quakes):
  • 17 Sep 1974 02:01 UTC
    | M 5.1 |
    17 km (10.6 mi) depth
    |
    39 km (24 mi) distance
    | USGS | Details
  • 07 Aug 1974 15:59 UTC
    | M 4.5 |
    33 km (20.5 mi) depth
    |
    20 km (13 mi) distance
    | USGS | Details
  • 07 Aug 1974 15:30 UTC
    | M 4.6 |
    33 km (20.5 mi) depth
    |
    15 km (9 mi) distance
    | USGS | Details
  • 07 Aug 1974 08:50 UTC
    | M 3.9 |
    67 km (41.6 mi) depth
    |
    25 km (16 mi) distance
    | USGS | Details
  • 07 Aug 1974 08:23 UTC
    | M 5.3 |
    33 km (20.5 mi) depth
    |
    3 km (2 mi) distance
    | USGS | Details
  • 07 Aug 1974 08:21 UTC
    | M 4.6 |
    32 km (19.9 mi) depth
    |
    17 km (11 mi) distance
    | USGS | Details
  • 06 Aug 1974 18:05 UTC
    | M 4.6 |
    33 km (20.5 mi) depth
    |
    13 km (8 mi) distance
    | USGS | Details
  • 06 Aug 1974 12:59 UTC
    | M 4.7 |
    16 km (9.9 mi) depth
    |
    15 km (9 mi) distance
    | USGS | Details
  • 04 Aug 1974 21:36 UTC
    | M 4.3 |
    40 km (24.9 mi) depth
    |
    21 km (13 mi) distance
    | USGS | Details
  • 03 Aug 1974 20:03 UTC
    | M 4.1 |
    33 km (20.5 mi) depth
    |
    13 km (8 mi) distance
    | USGS | Details
  • 02 Aug 1974 17:03 UTC
    | M 4.1 |
    36 km (22.4 mi) depth
    |
    4 km (3 mi) distance
    | USGS | Details
  • 02 Aug 1974 09:22 UTC
    | M 4.0 |
    64 km (39.8 mi) depth
    |
    51 km (31 mi) distance
    | USGS | Details
  • 01 Aug 1974 15:29 UTC
    | M 4.0 |
    33 km (20.5 mi) depth
    |
    16 km (10 mi) distance
    | USGS | Details
  • 01 Aug 1974 14:05 UTC
    | M 3.8 |
    33 km (20.5 mi) depth
    |
    13 km (8 mi) distance
    | USGS | Details
  • 01 Aug 1974 08:26 UTC
    | M 3.9 |
    33 km (20.5 mi) depth
    |
    6 km (4 mi) distance
    | USGS | Details
  • 01 Aug 1974 08:17 UTC
    | M 4.1 |
    33 km (20.5 mi) depth
    |
    9 km (6 mi) distance
    | USGS | Details

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Earlier earthquakes in the same area

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