Very strong mag. 6.1 earthquake - Gulf of Alaska, 5.7 mi south of Trinity s Island, Kodiak Island County, Alaska, USA, on Wednesday, 15 April 1964 at 15:30 (GMT)

Very strong mag. 6.1 earthquake - Gulf of Alaska, 5.7 mi south of Trinity s Island, Kodiak Island County, Alaska, USA, on Wednesday, 15 April 1964 at 15:30 (GMT)

Very strong magnitude 6.1 earthquake at 26 km depth

Date & time: 15 Apr 1964 15:30:47 UTC
Magnitude: 6.1
Depth: 25.6 km
Epicenter latitude / longitude: 56.48°N / 154.343°W (Gulf of Alaska, Alaska, United States)
Nearest volcano: Kialagvik (167 km / 104 mi)
Nearby towns and cities:
53 km (33 mi) S of Akhiok (pop: 72) --> See nearby quakes!
178 km (110 mi) SW of Kodiak Station (pop: 1,300) --> See nearby quakes!
187 km (116 mi) SW of Kodiak (pop: 6,250) --> See nearby quakes!
187 km (116 mi) SW of Saint Paul (pop: 6,250) --> See nearby quakes!
388 km (241 mi) SSW of Homer (pop: 5,520) --> See nearby quakes!
395 km (246 mi) SSW of Anchor Point (pop: 1,930) --> See nearby quakes!
404 km (251 mi) SSW of Fritz Creek (pop: 1,930) --> See nearby quakes!
473 km (294 mi) SSW of Kalifornsky (pop: 7,850) --> See nearby quakes!
485 km (301 mi) SSW of Soldotna (pop: 4,540) --> See nearby quakes!
494 km (307 mi) SW of Lowell Point (pop: 2,790) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 8.9 x 1013 joules (24.8 gigawatt hours, equivalent to 21301 tons of TNT or 1.3 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.
M 6.126 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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More info
Recorded aftershocks, latest first (2 quakes):
  • 08 May 1964 16:21 UTC
    | M 5.8 |
    24 km (14.9 mi) depth
    13 km (8 mi) distance
    | USGS | Details
  • 18 Apr 1964 20:16 UTC
    | M 5.8 |
    22.5 km (14 mi) depth
    51 km (32 mi) distance
    | USGS | Details

Earlier earthquakes in the same area

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