Very strong mag. 6.5 earthquake - Gulf of Alaska, 7.6 mi south of Trinity s Island, Kodiak Island, Alaska, USA, on Saturday, 4 April 1964 at 17:59 (GMT)
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Tremblement de terre très fort magnitude 6.5 at 25 km depth
Date & time: 4 Apr 1964 17:59:46 UTC
Magnitude: 6.5
Profondeur: 25.0 km
Epicenter latitude / longitude: 56.456°N / 154.428°W
(Gulf of Alaska, Alaska, États-Unis)Volcan le plus près: Kialagvik (164 km / 102 mi)
Nearby towns and cities:
57 km SSO de Akhiok (pop: 72) --> Voir les séismes à proximité!
183 km SO de Kodiak Station (pop: 1,300) --> Voir les séismes à proximité!
192 km SO de Kodiak (pop: 6,250) --> Voir les séismes à proximité!
393 km SSO de Homer (pop: 5,520) --> Voir les séismes à proximité!
398 km ENE de Sand Point (pop: 1,060) --> Voir les séismes à proximité!
400 km SSO de Anchor Point (pop: 1,930) --> Voir les séismes à proximité!
409 km SSO de Fritz Creek (pop: 1,930) --> Voir les séismes à proximité!
477 km SSO de Kalifornsky (pop: 7,850) --> Voir les séismes à proximité!
489 km SSO de Soldotna (pop: 4,540) --> Voir les séismes à proximité!
499 km SO de Seward (pop: 2,790) --> Voir les séismes à proximité!
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!) Plus d'infos
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 | Profondeur | Lieu | Source |
| 6.5 | 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 (8 quakes):- 08 May 1964 16:21 UTC| M 5.8 |24 km (14.9 mi) depth|18 km (11 mi) distance| USGS | Details
- 18 Apr 1964 20:16 UTC| M 5.8 |22.5 km (14 mi) depth|53 km (33 mi) distance| USGS | Details
- 17 Apr 1964 04:49 UTC| M 6.1 |20 km (12.4 mi) depth|92 km (57 mi) distance| USGS | Very strong mag. 6.1 earthquake - Gulf of Alaska, 45 mi southeast of Twoheaded Island, Kodiak Island, 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|89 km (55 mi) distance| USGS | Very strong mag. 6.4 earthquake - Gulf of Alaska, 46 mi southeast of Twoheaded Island, Kodiak Island, 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|6 km (4 mi) distance| USGS | Very strong mag. 6.1 earthquake - Gulf of Alaska, 5.7 mi south of Trinity s Island, Kodiak Island, Alaska, USA, on Wednesday, 15 April 1964 at 15:30 (GMT)
- 13 Apr 1964 21:25 UTC| M 5.7 |35 km (21.7 mi) depth|99 km (62 mi) distance| USGS | Details
- 05 Apr 1964 01:41 UTC| M 6.0 |24.9 km (15.5 mi) depth|61 km (38 mi) distance| USGS | Strong mag. 6.0 earthquake - Gulf of Alaska, 36 mi southeast of Sitkinak Island, Kodiak Island, 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|63 km (39 mi) distance| USGS | Very strong mag. 6.3 earthquake - Gulf of Alaska, 32 mi southeast of Sitkinak Island, Kodiak Island, Alaska, USA, on Sunday, 5 April 1964 at 01:22 (GMT)
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