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Major magnitude 7.0 earthquake - Bering Sea, 19 mi east of Tag s Island, Aleutians West County, Alaska, USA, on Friday, 5 July 1929 at 14:19 (GMT)
Major magnitude 7.0 earthquake at 35 km depth
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Date & time: 5 Jul 1929 14:19:09 UTC
Magnitude: 7Depth: 35.0 km
Epicenter latitude / longitude: 51.473°N / 178.152°W
(
Bering Sea,
Alaska,
United States)
Nearest volcano:
Tanaga (46 km / 29 mi)
Nearby towns and cities:114 km (71 mi) WSW of Adak (pop: 332) -->
See nearby quakes!283 km (176 mi) WSW of Atka (pop: 64) -->
See nearby quakes!Primary data source:
USGS (United States Geological Survey)
Estimated released energy: 2 x 10
15 joules (554 gigawatt hours, equivalent to 4.8 x 10
5 tons of TNT or 29.8 atomic bombs!)
More info[show map]
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Data for the same earthquake reported by different agencies
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| Magnitude | Depth | Location | Source |
| M 7.0 | 35 km | Andreanof Islands, Aleutian Islands, Alaska (USA) | USGS |
Note: for quakes of 2012 and earlier, our database often contains only records from USGS.
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Aftershocks
More info
Based on its magnitude, the fault that was active during the quake ruptured along a surface of approx. 1000 km
2 (=386 sqare miles) as a first-order estimate. The length of the rupture zone thus was probably around 55 km (34 mi).
Aftershocks typically occur during the weeks, months or even a year following the quake at or near the same fault, at distances of up to approx. two times the length of the rupture zone.
The often broadly linear arrangement of aftershock epicenters encompasses the rupture zone of the main shock (check on the
map below to verify).
07 Jul 1929 21:23 UTC
| M 7.3 | 35 km (21.7 mi) depth
| 26 km (16 mi) distance
| USGS | Major magnitude 7.3 earthquake - Bering Sea, 23 mi south of Tannaga Island, Aleutians West County, Alaska, USA, on Sunday, 7 July 1929 at 21:23 (GMT)05 Jul 1929 22:36 UTC
| M 6.5 | 25 km (15.5 mi) depth
| 83 km (51 mi) distance
| USGS | Very strong mag. 6.5 earthquake - Bering Sea, 52 mi south of Adak, Aleutians West County, Alaska, USA, on Friday, 5 July 1929 at 22:36 (GMT)
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