Very strong mag. 6.3 earthquake - Gulf of Alaska, 93 mi south of Kodiak, Alaska, USA, on Sunday, 12 April 1964 at 01:24 (GMT)
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Very strong magnitude 6.3 earthquake at 15 km depth
Date & time: 12 Apr 1964 01:24:32 UTC
Magnitude: 6.3
Depth: 15.0 km
Epicenter latitude / longitude: 56.446°N / 152.349°W
(Gulf of Alaska, Alaska, United States)Nearest volcano: Unnamed 57.87°N/155.42°W (244 km / 152 mi)
Nearby towns and cities:
102 km (64 mi) SE of Old Harbor (pop: 221) --> See nearby quakes!
139 km (86 mi) S of Womens Bay (pop: 719) --> See nearby quakes!
148 km (92 mi) S of Kodiak Station (pop: 1,300) --> See nearby quakes!
149 km (93 mi) S of Kodiak (pop: 6,250) --> See nearby quakes!
359 km (223 mi) S of Homer (pop: 5,520) --> See nearby quakes!
371 km (231 mi) S of Fritz Creek (pop: 1,930) --> See nearby quakes!
372 km (231 mi) S of Anchor Point (pop: 1,930) --> See nearby quakes!
441 km (274 mi) SSW of Lowell Point (pop: 2,790) --> See nearby quakes!
446 km (277 mi) S of Kalifornsky (pop: 7,850) --> See nearby quakes!
456 km (283 mi) S of Soldotna (pop: 4,540) --> 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
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.
| Magnitude | Depth | Location | Source |
| M 6.3 | 15 km | Kodiak Island region, Alaska (USA) | 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!
Aftershocks
More info
Recorded aftershocks, latest first (4 quakes):- 12 May 1964 18:16 UTC| M 6.3 |20 km (12.4 mi) depth|9 km (5 mi) distance| USGS | 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)
- 06 May 1964 15:26 UTC| M 5.9 |20 km (12.4 mi) depth|19 km (12 mi) distance| USGS | Details
- 17 Apr 1964 04:49 UTC| M 6.1 |20 km (12.4 mi) depth|38 km (24 mi) distance| USGS | Very strong mag. 6.1 earthquake - Gulf of Alaska, 45 mi southeast of Twoheaded Island, Kodiak Island County, Alaska, USA, on Friday, 17 April 1964 at 04:49 (GMT)
- 16 Apr 1964 19:26 UTC| M 6.4 |25 km (15.5 mi) depth|44 km (27 mi) distance| USGS | Very strong mag. 6.4 earthquake - Gulf of Alaska, 46 mi southeast of Twoheaded Island, Kodiak Island County, Alaska, USA, on Thursday, 16 April 1964 at 19:26 (GMT)
Earlier earthquakes in the same area
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