Moderate mag. 4.9 earthquake - Bering Sea, USA, on 4 May 7:47 am (GMT -9) -

Moderate mag. 4.9 earthquake - Bering Sea, USA, on 4 May 7:47 am (GMT -9)

Moderate magnitude 4.9 earthquake at 54 km depth

4 May 16:59 UTC: First to report: GFZ after 11 minutes.
4 May 17:14: Now using data updates from USGS
4 May 17:32: Hypocenter depth recalculated from 57.1 to 50.9 km (from 35 to 32 mi). Epicenter location corrected by 9 km (5.6 mi) towards SSE.
4 May 21:28: Hypocenter depth recalculated from 50.9 to 54.3 km (from 32 to 34 mi). Epicenter location corrected by 11 km (6.8 mi) towards N.
Date & time: 4 May 2021 16:47:43 UTC -
Local time at epicenter: 4 May 7:47 am (GMT -9)
Magnitude: 4.9
Depth: 54.3 km
Epicenter latitude / longitude: 52.4413°N / 170.5567°W (Bering Sea, Alaska, United States)
Nearest volcano: Yunaska (49 km / 30 mi)
Nearby towns and cities:
127 km (79 mi) WSW of Nikolski (pop: 18) --> See nearby quakes!
249 km (155 mi) E of Atka (pop: 64) --> See nearby quakes!
312 km (194 mi) WSW of Unalaska (pop: 4,490) --> See nearby quakes!
369 km (229 mi) WSW of Akutan (pop: 1,040) --> See nearby quakes!
Weather at epicenter at time of quake:
Overcast Clouds 2.9°C (37 F), humidity: 71%, wind: 4 m/s (8 kts) from SW
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.4 x 1012 joules (392 megawatt hours, equivalent to 338 tons of TNT) More info
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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.
MagnitudeDepthLocationSource
4.954 km127 Km WSW of Nikolski, Alaska, USAUSGS
4.960 kmFOX ISLANDS, ALEUTIAN ISLANDS, USAEMSC
4.852 kmFox Islands, Aleutian Islands, USAGFZ

User reports for this quake

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Earlier earthquakes in the same area

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