Very strong mag. 6.5 earthquake - Gulf of Alaska, 97 mi south of Kodiak, Alaska, USA, on Saturday, 28 March 1964 at 09:01 (GMT)
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Very strong magnitude 6.5 earthquake at 15 km depth
Date & time: 28 Mar 1964 09:01:01 UTC
Magnitude: 6.5
Depth: 15.0 km
Epicenter latitude / longitude: 56.388°N / 152.115°W
(Gulf of Alaska, Alaska, United States)Nearby towns and cities:
116 km (72 mi) SE of Old Harbor (pop: 221) --> See nearby quakes!
140 km (87 mi) ESE of Akhiok (pop: 72) --> See nearby quakes!
148 km (92 mi) SSE of Womens Bay (pop: 719) --> See nearby quakes!
156 km (97 mi) SSE of Kodiak Station (pop: 1,300) --> See nearby quakes!
157 km (97 mi) S of Kodiak (pop: 6,250) --> See nearby quakes!
364 km (226 mi) S of Homer (pop: 5,520) --> See nearby quakes!
376 km (233 mi) S of Fritz Creek (pop: 1,930) --> See nearby quakes!
377 km (234 mi) S of Anchor Point (pop: 1,930) --> See nearby quakes!
442 km (275 mi) SSW of Lowell Point (pop: 2,790) --> See nearby quakes!
451 km (280 mi) S of Kalifornsky (pop: 7,850) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 3.5 x 1014 joules (98.6 gigawatt hours, equivalent to 84802 tons of TNT or 5.3 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 6.5 | 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.
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Aftershocks
More info
Recorded aftershocks, latest first (14 quakes):- 12 May 1964 18:16 UTC| M 6.3 |20 km (12.4 mi) depth|24 km (15 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|24 km (15 mi) distance| USGS | Details
- 23 Apr 1964 14:56 UTC| M 5.6 |25 km (15.5 mi) depth|98 km (61 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|56 km (35 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)
- 12 Apr 1964 01:24 UTC| M 6.3 |15 km (9.3 mi) depth|16 km (10 mi) distance| USGS | 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)
- 07 Apr 1964 19:28 UTC| M 5.8 |15 km (9.3 mi) depth|85 km (53 mi) distance| USGS | Details
- 05 Apr 1964 01:41 UTC| M 6.0 |24.9 km (15.5 mi) depth|100 km (62 mi) distance| USGS | 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)
- 05 Apr 1964 01:22 UTC| M 6.3 |20 km (12.4 mi) depth|83 km (51 mi) distance| USGS | Very strong mag. 6.3 earthquake - Gulf of Alaska, 32 mi southeast of Sitkinak Island, Kodiak Island County, Alaska, USA, on Sunday, 5 April 1964 at 01:22 (GMT)
- 04 Apr 1964 09:10 UTC| M 5.9 |20.6 km (12.8 mi) depth|60 km (37 mi) distance| USGS | Details
- 04 Apr 1964 08:40 UTC| M 6.1 |20 km (12.4 mi) depth|45 km (28 mi) distance| USGS | Very strong mag. 6.1 earthquake - Gulf of Alaska, 44 mi southeast of Twoheaded Island, Kodiak Island County, Alaska, USA, on Saturday, 4 April 1964 at 08:40 (GMT)
- 30 Mar 1964 16:09 UTC| M 6.0 |15.5 km (9.6 mi) depth|17 km (11 mi) distance| USGS | Very strong mag. 6.0 earthquake - Gulf of Alaska, 55 mi southeast of Sitkalidak Island, Kodiak Island County, Alaska, USA, on Monday, 30 March 1964 at 16:09 (GMT)
- 30 Mar 1964 02:18 UTC| M 6.7 |18.6 km (11.6 mi) depth|43 km (27 mi) distance| USGS | Very strong mag. 6.7 earthquake - Gulf of Alaska, 41 mi southeast of Twoheaded Island, Kodiak Island County, Alaska, USA, on Monday, 30 March 1964 at 02:18 (GMT)
- 28 Mar 1964 10:35 UTC| M 6.1 |22.4 km (13.9 mi) depth|78 km (48 mi) distance| USGS | Very strong mag. 6.1 earthquake - Gulf of Alaska, 28 mi southeast of Old Harbor, Kodiak Island County, Alaska, USA, on Saturday, 28 March 1964 at 10:35 (GMT)
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