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Strong mag. 5.2 earthquake - Bering Sea, 50 mi south of Atka, Aleutians West County, Alaska, USA, on Saturday, 4 July 2015 at 23:35 (GMT)
Strong magnitude 5.2 earthquake at 25 km depth
5 Jul 00:10 UTC: First to report: EMSC after 34 minutes.
Hypocenter depth recalculated from 2.0 to 25.0 km.
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Date & time: 4 Jul 2015 23:35:53 UTC
Magnitude: 5.2Depth: 25.0 km
Epicenter latitude / longitude: 51.52°N / 173.78°W
(
Bering Sea,
United States)
Nearest volcano:
Atka (85 km / 53 mi)
Nearby towns and cities:81 km (50 mi) SSE of Atka (pop: 64) -->
See nearby quakes!201 km (125 mi) E of Adak (pop: 332) -->
See nearby quakes!370 km (230 mi) WSW of Nikolski (pop: 18) -->
See nearby quakes!Primary data source:
EMSC (European-Mediterranean Seismological Centre)
Estimated released energy: 4 x 10
12 joules (1.11 gigawatt hours, equivalent to 951 tons of TNT)
More info[show map]
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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 5.2 | 25 km | ANDREANOF ISLANDS, ALEUTIAN IS. | EMSC |
| M 5.2 | 10 km | Andreanof Islands, Aleutian Islands | GFZ |
| M 5.2 | 27 km | - 82km SSE of Atka, Alaska | 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. 16 km
2 (=6 sqare miles) as a first-order estimate. The length of the rupture zone thus was probably around 7 km (4 mi).
Aftershocks typically occur during the days and weeks 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).
11 Jul 2015 04:18 UTC
| M 2.6 | 17.7 km (11 mi) depth
| 18 km (11 mi) distance
| USGS | Details05 Jul 2015 18:56 UTC
| M 4.8 | 10 km (6.2 mi) depth
| 15 km (10 mi) distance
| GFZ | Details
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