Strong mag. 6.9 earthquake - Gulf of Alaska, 12 mi southwest of Chirikof Island, Kodiak Island County, Alaska, USA, on Thursday, 6 February 1964 at 13:07 (GMT)
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Strong magnitude 6.9 earthquake at 20 km depth
Magnitude: 6.9
Depth: 20.0 km
Epicenter latitude / longitude: 55.703°N / 155.853°W
(Gulf of Alaska, Alaska, United States)Nearest volcano: Yantarni (168 km / 104 mi)
Nearby towns and cities:
173 km (107 mi) SW of Akhiok (pop: 72) --> See nearby quakes!
180 km (112 mi) ESE of Chignik Lagoon (pop: 78) --> See nearby quakes!
295 km (183 mi) E of Sand Point (pop: 1,060) --> See nearby quakes!
303 km (188 mi) SW of Kodiak Station (pop: 1,300) --> See nearby quakes!
313 km (194 mi) SW of Kodiak (pop: 6,250) --> See nearby quakes!
415 km (258 mi) ENE of King Cove (pop: 1,010) --> See nearby quakes!
507 km (315 mi) SSW of Homer (pop: 5,520) --> See nearby quakes!
524 km (325 mi) SSW of Fritz Creek (pop: 1,930) --> See nearby quakes!
5879 km (3653 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
5879 km (3653 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.4 x 1015 joules (392 gigawatt hours, equivalent to 3.4 x 105 tons of TNT or 21.1 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 6.9 | 20 km | south of 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 of the 6.9 quake Gulf of Alaska, 12 mi southwest of Chirikof Island, Kodiak Island County, Alaska, USA, 6 February 1964 13:07 GMT
More info
Recorded aftershocks, latest first (4 quakes):- 04 Apr 1964 17:59 UTC| M 6.5 |25 km (15.5 mi) depth|122 km (76 mi) distance| USGS | Strong mag. 6.5 earthquake - Gulf of Alaska, 7.6 mi south of Trinity s Island, Kodiak Island County, Alaska, USA, on Saturday, 4 April 1964 at 17:59 (GMT)
- 04 Apr 1964 17:46 UTC| M 6.8 |18.4 km (11.4 mi) depth|112 km (69 mi) distance| USGS | Strong mag. 6.8 earthquake - Gulf of Alaska, 14 mi southeast of Tugidak Island, Kodiak Island County, Alaska, USA, on Saturday, 4 April 1964 at 17:46 (GMT)
- 29 Mar 1964 06:04 UTC| M 6.2 |26.1 km (16.2 mi) depth|108 km (67 mi) distance| USGS | Strong mag. 6.2 earthquake - Gulf of Alaska, 25 mi southeast of Tugidak Island, Kodiak Island County, Alaska, USA, on Sunday, 29 March 1964 at 06:04 (GMT)
- 28 Mar 1964 14:46 UTC| M 6.5 |25 km (15.5 mi) depth|119 km (74 mi) distance| USGS | Strong mag. 6.5 earthquake - Gulf of Alaska, 20 mi south of Sitkinak Island, Kodiak Island County, Alaska, USA, on Saturday, 28 March 1964 at 14:46 (GMT)
Earlier earthquakes in the same area
Strong mag. 6.9 earthquake - Gulf of Alaska, 12 mi southwest of Chirikof Island, Kodiak Island County, Alaska, USA, on Thursday, 6 February 1964 at 13:07 (GMT)
Click here to search our database for earlier earthquakes in the same area since 1900!
