Very strong mag. 6.3 earthquake - Gulf of Alaska, 53 mi southeast of Twoheaded Island, Kodiak Island County, Alaska, USA, on Tuesday, 12 May 1964 at 18:16 (GMT)

Very strong mag. 6.3 earthquake - Gulf of Alaska, 53 mi southeast of Twoheaded Island, Kodiak Island County, Alaska, USA, on Tuesday, 12 May 1964 at 18:16 (GMT)

Very strong magnitude 6.3 earthquake at 20 km depth

Date & time: 12 May 1964 18:16:46 UTC
Magnitude: 6.3
Depth: 20.0 km
Epicenter latitude / longitude: 56.431°N / 152.489°W (Gulf of Alaska, Alaska, United States)
Nearest volcano: Unnamed 57.87°N/155.42°W (238 km / 148 mi)
Nearby towns and cities:
99 km (62 mi) SSE of Old Harbor (pop: 221) --> See nearby quakes!
118 km (73 mi) ESE of Akhiok (pop: 72) --> See nearby quakes!
140 km (87 mi) S of Womens Bay (pop: 719) --> See nearby quakes!
149 km (92 mi) S of Kodiak Station (pop: 1,300) --> See nearby quakes!
151 km (94 mi) S of Kodiak (pop: 6,250) --> See nearby quakes!
361 km (225 mi) S of Homer (pop: 5,520) --> See nearby quakes!
374 km (232 mi) S of Anchor Point (pop: 1,930) --> See nearby quakes!
374 km (233 mi) S of Fritz Creek (pop: 1,930) --> See nearby quakes!
446 km (277 mi) SSW of Lowell Point (pop: 2,790) --> See nearby quakes!
449 km (279 mi) S of Kalifornsky (pop: 7,850) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.8 x 1014 joules (49.4 gigawatt hours, equivalent to 42502 tons of TNT or 2.7 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 6.320 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

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Aftershocks

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Recorded aftershocks, latest first (0 quakes):
So far, no aftershocks have been registered.

Earlier earthquakes in the same area

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