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Moderate mag. 5.1 earthquake - Bering Sea, 23 mi south of Adak, Aleutians West County, Alaska, USA, on 2015-07-18 04:20:28 -09:00
Moderate magnitude 5.1 earthquake at 51 km depth
18 Jul 14:10 UTC: First to report: USGS after 50 minutes.
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Date & time: 18 Jul 2015 13:20:28 UTC
Local time at epicenter: 2015-07-18 04:20:28 -09:00
Magnitude: 5.1Depth: 51.2 km
Epicenter latitude / longitude: 51.5507°N / 176.7526°W
(
Bering Sea,
Alaska,
United States)
Nearest volcano:
Moffett (44 km / 27 mi)
Nearby towns and cities:37 km (23 mi) SSW of Adak (pop: 332) -->
See nearby quakes!189 km (118 mi) WSW of Atka (pop: 64) -->
See nearby quakes!Primary data source:
USGS (United States Geological Survey)
Estimated released energy: 2.8 x 10
12 joules (783 megawatt hours, equivalent to 674 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 5.1 | 51 km | - 37km S of Adak, Alaska | USGS |
| M 5.1 | 54 km | ANDREANOF ISLANDS, ALEUTIAN IS. | EMSC |
| M 5.1 | 41 km | Andreanof Islands, Aleutian Islands | GFZ |
![shake map]()
(shakemap: 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. 13 km
2 (=5 sqare miles) as a first-order estimate. The length of the rupture zone thus was probably around 6 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).
25 Aug 2015 20:41 UTC
| M 2.7 | 41.2 km (25.6 mi) depth
| 14 km (9 mi) distance
| USGS | Details12 Aug 2015 06:28 UTC
| M 2.0 | 43.3 km (26.9 mi) depth
| 7 km (4 mi) distance
| USGS | Details
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