Moderate mag. 4.0 earthquake - Bering Sea, 38 mi southeast of Tag s Island, Aleutians West County, Alaska, USA, on Thursday, 20 August 2015 at 23:18 (GMT)
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Moderate magnitude 4.0 earthquake at 10 km depth
21 Aug 01:10 UTC: First to report: EMSC after 1 hour and 51 minutes.
Date & time: 20 Aug 2015 23:18:40 UTC
Depth: 10.0 km
Epicenter latitude / longitude: 51.14°N / 178.01°W (Bering Sea, United States)
Nearest volcano: Takawangha (82 km / 51 mi)
Nearby towns and cities:
125 km (78 mi) SW of Adak (pop: 332) --> See nearby quakes!
288 km (179 mi) WSW of Atka (pop: 64) --> See nearby quakes!
Primary data source: EMSC (European-Mediterranean Seismological Centre)
Estimated released energy: 6.3 x 1010 joules (17.5 megawatt hours, equivalent to 15.1 tons of TNT) 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.
|M 4.0||10 km||ANDREANOF ISLANDS, ALEUTIAN IS.||EMSC|
|M 4.0||10 km||- 78km E of Amatignak Island, Alaska||USGS|
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.