Strong mag. 6.0 earthquake - Gulf of Alaska, 36 mi southeast of Sitkinak Island, Kodiak Island County, Alaska, USA, on Sunday, 5 April 1964 at 01:41 (GMT)
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Strong magnitude 6.0 earthquake at 25 km depth
Date & time: 5 Apr 1964 01:41:45 UTC
Magnitude: 6
Depth: 24.9 km
Epicenter latitude / longitude: 56.116°N / 153.656°W
(Gulf of Alaska, Alaska, United States)Nearest volcano: Unnamed 57.87°N/155.42°W (222 km / 138 mi)
Nearby towns and cities:
98 km (61 mi) SSE of Akhiok (pop: 72) --> See nearby quakes!
123 km (76 mi) S of Old Harbor (pop: 221) --> See nearby quakes!
184 km (114 mi) SSW of Womens Bay (pop: 719) --> See nearby quakes!
194 km (121 mi) SSW of Kodiak Station (pop: 1,300) --> See nearby quakes!
201 km (125 mi) SSW of Kodiak (pop: 6,250) --> See nearby quakes!
411 km (256 mi) SSW of Homer (pop: 5,520) --> See nearby quakes!
421 km (262 mi) SSW of Anchor Point (pop: 1,930) --> See nearby quakes!
426 km (265 mi) SSW of Fritz Creek (pop: 1,930) --> See nearby quakes!
437 km (272 mi) ENE of Sand Point (pop: 1,060) --> See nearby quakes!
508 km (316 mi) SSW of Lowell Point (pop: 2,790) --> 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
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 6.0 | 25 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.
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Aftershocks
More info
Recorded aftershocks, latest first (5 quakes):- 08 May 1964 16:21 UTC| M 5.8 |24 km (14.9 mi) depth|55 km (34 mi) distance| USGS | Details
- 18 Apr 1964 20:16 UTC| M 5.8 |22.5 km (14 mi) depth|10 km (6 mi) distance| USGS | Details
- 17 Apr 1964 04:49 UTC| M 6.1 |20 km (12.4 mi) depth|51 km (32 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|45 km (28 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)
- 15 Apr 1964 15:30 UTC| M 6.1 |25.6 km (15.9 mi) depth|59 km (36 mi) distance| USGS | 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)
Earlier earthquakes in the same area
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